About
394
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2,418
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Introduction
Current institution
Additional affiliations
September 1986 - present
January 2013 - present
Position
- Modeling of pulsatile fluid flow stability in tubes with compliant walls applied to hemodynamics in arteries with wall pathologies
Description
- Russian Foundation for Basic Research Project No. 13-01-00270
January 2010 - December 2012
Position
- Multi-layer compliant coating for laminar-turbulent transition control
Description
- Russian Foundation for Basic Research Project No. 10-08-00276
Education
October 1989 - October 1992
July 1983 - June 1989
Novosibirsk State University
Field of study
- Physics
Publications
Publications (394)
Modern approaches to visualization and automatic identification of separation regionsof three-dimensional boundary layers are discussed. The corresponding algorithms are implemented within the framework of the original LOTRAN software package designed to predict the onset of a laminar-turbulent transition in boundary layers over small-curvature sur...
A technology for numerical analysis of the local biglobal stability of laminar incompressible boundary layers over streamwise-ribbed surfaces is proposed. Within its framework, the stability is studied using the locally-parallel approximation and Floquet theory. The work of the proposed technology is demonstrated by the example of a boundary layer...
The work is devoted to modeling the disturbance propagation in viscous incompressible laminar boundary layers, using linearized equations for disturbance amplitudes. Along with the numerical model based on original linearized equations, the article considers three models based on equations derived from the original ones by neglecting the streamwise...
A method and results of computing a laminar-turbulent flow past a swept wing under a control action generated by a source of blowing or suction from the model surface are presented. Pioneering results on the influence of three-dimensional blowing and suction sources on stability of the boundary layer on a swept wing and distributions of N-factors o...
The hydrodynamic stability theory deals with external disturbances of a main flow, whose stability is of interest. It studies their propagation in space or evolution in time. Stability
characteristics, such as the growth rate, and the phase and group velocities, allow one to describe the propagation of the most unstable disturbances. The computatio...
Stochastization of boundary-layer flow has a dramatic effect on the aerodynamic characteristics of wings, nacelles, and other objects frequently encountered in practice, resulting in higher skin-friction drag and worse aerodynamic quality. A swept-wing boundary layer encountering a transition to turbulence in the presence of two-dimensional surface...
The article deals with the downstream propagation of small–amplitude disturbances of viscous incompressible laminar boundary layers, using the linearized equations for disturbance amplitudes. Two different methods are proposed. The first one solves a two-dimensional boundary-value problem, using a buffer-domain technique to mimic the outflow bounda...
The linear temporal stability of the Poiseuille flow through a rectangular duct is considered. The effect of the duct aspect ratio on the transient growth of disturbances, which causes the so-called subcritical laminar–turbulent transition, is studied numerically. In particular, it is shown that an increase in the aspect ratio promotes the subcriti...
The results of numerical simulation of a subsonic flow around a 45-degree swept wing model with a NACA 67 1-215 airfoil are considered. The simulation was performed using the ANSYS Fluent package with a plug-in original module LOTRAN for predicting the position of laminar-turbulent transition, which implements the eN-method. In particular, the dist...
This paper formulates the problem of determining the response of a flat monolithic viscoelastic coating to traveling pressure and shear waves in two-dimensional formulation. Examples of corresponding numerical computations for coating parameters typical for laboratory experiments on the reduction in turbulent viscous drag are presented. The coating...
The temporal linear stability of the Poiseuille flow in an infinite pipe of uniform elliptic cross-section with a compliant wall is numerically investigated in a broad range of the problem parameters. The pipe wall is modeled as a thin elastic shell, which can be surrounded by viscoelastic foundation; the latter is considered as a distributed set o...
The goal of the paper is to determine the position of the laminar-turbulent transition in the boundary layer of a prolate spheroid using the e N -method with the calibration of threshold N -factors. It is demonstrated that the predicted and experimental data on the laminarturbulent transition are in good agreement.
The laminar-turbulent transition in the boundary layer of a 45° swept wing model installed at zero attack angle in the test section of a subsonic wind-tunnel was detected with the help of an infrared camera. The camera recorded sequences of frames, the evolution of the preheated model surface temperature acquired and used for differentiating betwee...
In this paper, known probabilistic methods for estimating the thickness of the boundary layer of a two-dimensional laminar flow of viscous incompressible fluid are extended to three-dimensional laminar flows of a viscous compressible medium. Their applicability to the problems of boundary-layer stability is studied with the LOTRAN3 software package...
The paper describes a technology designed for computing three-dimensional transonic laminar–turbulent flows at various aerodynamic configurations with the use of the general-purpose computational fluid dynamics code ANSYS Fluent and an integrated special module of computing the laminar–turbulent transition position created on the basis of the auton...
The problem of calibration of semi-empirical eN-method for prediction of laminar-turbulent transition in three-dimensional boundary layers is discussed. A high-resolving panoramic experimental technique to estimate the onset and length of the transition for aerodynamic applications is proposed and described. The position of laminar-turbulent transi...
Обсуждается проблема точного экспериментального определения положения ламинарно-турбулентного перехода в трехмерных пограничных слоях с помощью бесконтактного панорамного метода на основе инфракрасной термографии. Предлагается и подробно описывается надежная экспериментальная методика с высоким раз? решением для оценки не только осредненного положе...
Actual fundamental and computational problems of laminar–turbulent transition prediction in aerodynamic flows are discussed. The author’s approach based on the exp(N)-method is briefly described. The results of experimental studies aimed at clarifying the calibration of the exp(N)-method is highlighted. Particularly, one of the main problem is a li...
Numerical simulation of three-dimensional flow past a prolate spheroid located at an angle of attack of 10° accompanied by the laminar-turbulent transition was performed for subsonic (M∞ = 0.136) and transonic (M∞ = 0.75) velocities. The general-purpose gas-dynamic package ANSYS Fluent in integration with a laminar-turbulent transition module based...
Modern fundamental and computational problems in predicting the laminar-turbulent transition in aerodynamic flows are considered. A review of advanced engineering methods of forecasting the transition to turbulence in two- and three-dimensional aerodynamic flows at pre- and transonic speeds is given. The approach based on the exp (N)-method is summ...
Wind Tunnel: T-324 ITAM SB RAS (Novosibirsk);
Swept Wing Model: SW45 (swept angle 45 degrees, chord length 0.7м); Angle of Attack: -3 degree;
Side under Study: Lower (pressure) side;
Insident Flow Tu-level: 0.1%;
Incident Flow Speeds:10-50m/s
Wind Tunnel: T-324 ITAM SB RAS (Novosibirsk);
Swept Wing Model: SW45 (swept angle 45 degrees, chord length 0.7м); Angle of Attack: -3 degree;
Side under Study: Lower (pressure) side;
Insident Flow Tu-level: 0.1%;
Incident Flow Speeds: 10-39 m/s
Wind Tunnel: T-324 ITAM SB RAS (Novosibirsk);
Swept Wing Model: SW45 (swept angle 45 degrees, chord length 0.7м); Angle of Attack: 0 degree;
Side under Study: Lower (pressure) side;
Insident Flow Tu-level: 0.5%;
Incident Flow Speeds: 10-39 m/s
Wind Tunnel: T-324 ITAM SB RAS (Novosibirsk); Swept Wing Model: SW45 (swept angle 45 degrees, chord length 0.7м); Angle of Attack: -3 degree; Side under Study: Lower (pressure) side; Insident Flow Tu-level: 0.76%; Incident Flow Speeds: 10-36 m/s
Wind Tunnel: T-324 ITAM SB RAS (Novosibirsk);
Swept Wing Model: SW45 (swept angle 45 degrees, chord length 0.7м); Angle of Attack: 0 degree;
Side under Study: Lower (pressure) side;
Insident Flow Tu-level: 0.1%;
Incident Flow Speeds: 10-50 m/s
Wind Tunnel: T-324 ITAM SB RAS (Novosibirsk);
Swept Wing Model: SW45 (swept angle 45 degrees, chord length 0.7м); Angle of Attack: 0 degree;
Side under Study: Lower (pressure) side;
Insident Flow Tu-level: 0.76%;
Incident Flow Speeds: 10-39 m/s
The subject of the paper is the instability of the flow in local regions of laminar boundary-layer separation, the so-called “separation bubbles” that arise in the flow of an incompressible fluid. Typical examples of separated flows of this type are the areas of separation that accompany the flow around airfoils at low Reynolds numbers, geometric s...
A transition prediction module for 3D compressible flows was developed by the authors in order to include the prediction of the laminar-turbulent transition in hydrodynamics computational codes; particularly the module was integrated in the general-purpose gas-dynamic package ANSYS Fluent. The subsonic air flow about a swept wing model with the swe...
The paper illustrates some result of the efforts in ITAM SB RAS in designing an engineering tool LOTRAN 3.0 integrated with the ANSYS Fluent for predicting the position of the laminar-turbulent transition in compressible fully three-dimensional boundary layers. The paper presents some validation results for the laminar- turbulent transition in full...
Описывается новая экспериментальная методика панорамного бесконтактного определения положения ламинарно-турбулентного перехода в трехмерном пограничном слое. Показано, что данная методика позволяет точно определить положение границ области перехода как при низкой, так и при повышенной степенях турбулентности набегающего потока.
A new experimental method for panoramic contactless determination of the laminar-turbulent transition position in a three-dimensional boundary layer is described. It is demonstrated that this method allows accurate determination of the transition region boundaries at both low and enhanced levels of free-stream turbulence.
The results of a parametric study of hydrodynamic stability in linear formulation of the Blasius boundary layer stability over two-layer compliant coatings are presented. In the calculations, experimental data for real silicon rubbers of several types on the elasticity modulus and the loss factor as functions of deformation frequency are used. Eigh...
A subsonic (U ∞ =30 m/s) flow around a swept wing with a sweep angle of 45° and a chord of 700 mm aligned at an angle of attack in the test section of the T-324 wind tunnel based at the Khristianovich Institute of Theoretical and Applied Mechanics of the Siberian Branch of the Russian Academy of Sciences is considered. The experiments include measu...
The goal of the paper is to determine the position of the laminar-turbulent transition in subsonic and transonic two-dimensional boundary layers on an airfoil with the use of the a laminar-turbulent transition module based on the e N -method and using the results of numerical simulations of the laminar flow around the model performed by the ANSYS F...
The paper deals with the numerical simulation of the laminar-turbulent transition as the gas flow moves at a nacelle at transonic speeds. The laminar-turbulent transition position in the 3D boundary layer of the nacelle is found with the aid of the laminar-turbulent transition module based on the e N -method which involves the data of the numerical...
A numerical algorithm for solving equations of fluid dynamics for the case of a stable stratified flow with a bluff body in the form of a thin vertical barrier generating internal waves is developed and verified with the use of the OpenFOAM software. Numerical simulations of this flow are performed for different Froude numbers for steady and unstea...
An unstable laminar flow over a wavy region of a plate placed parallel to the oncoming air flow is studied. The results have been obtained by the hot-wire method in a low-turbulent wind tunnel at low subsonic velocities. Flow near a wall with transverse undulation, whose amplitude is sufficiently large and can contribute to the formation of local r...
The study is aimed at determining the position of the laminar-turbulent transition in subsonic and transonic two-dimensional boundary layers with the use of a novel software package LOTRAN 2.0 developed by the authors. The package is based on the eN-method and employs numerical data of numerical simulations of the laminar flow performed by standard...
A new experimental technique of panoramic determination of the position of the laminar-turbulent transition in three-dimensional boundary-layer flows with a thermal imaging camera is described. It is shown that it is suitable for parametric measurements of the transition providing a sharp location of the transition at both low and high degrees of f...
The goal of the present work is to integrate the LOTRAN 3.0 package designed for computing the laminar-turbulent transition on the basis of the eN-method into the ANSYS Fluent fluid dynamic software. Integration means the transformation of this package into a laminar-turbulent transition module, i.e., the development and implementation of interface...
A review of recent research on the hydrodynamic instabilities of incompressible asymmetric flows along dihedral corner with the aim of obtaining data necessary for modeling the laminar-turbulent transition is presented. The results of numerical simulation of the flow along the corner based on parametric (for various angles of attack and for differe...
Results of studying stability of the Blasius boundary layer on a two-layer compliant coating in the linear formulation are reported. The computations are based on experimental parameters of viscoelasticity of a real coating, which reveal the dependences of its elasticity modulus and loss coefficient on frequency. Parametric investigations of the in...
A possibility of using the 4D Qflow protocol, which is commonly applied for medical diagnostics by magnetic resonance imaging, for determining the structure of the three-dimensional fluid flow in the human blood circulation system is considered. Specialized software is developed for processing DICOM images taken by a magnetic resonance scanner, and...
The work is devoted to the use of asymptotic boundary conditions for engineering prediction of the laminar-turbulent transition position in hydrodynamic flows by the eN-method. It is shown that the asymptotic boundary conditions can significantly reduce the total computational cost.
A new approach to formulation of asymptotic boundary conditions for eigenvalue problems arising in numerical analysis of hydrodynamic stability of such shear flows as boundary layers, separations, jets, wakes, characterized by almost constant velocity of the main flow outside the shear layer or layers is proposed and justified. This approach makes...
Experiments on the effect of two-layer compliant coatings on the surface friction of a flat plate at flow velocities of up to 16 m/s carried out in a water tunnel are described. To document the properties of the coatings, the dynamic viscoelastic properties of used rubbers were measured in the frequency range approximately corresponding to the freq...
In this work we study a 4D Qflow scanning protocol used in medical magnetic resonance imaging. Post-processing of the DICOM images acquired from the MR scanner allows one to reconstruct time-dependent three-dimensional velocity field. We show that with MR velocimetry it is possible to determine whether it exists and study the swirling (helical) cha...
Two methods of laminar-turbulent transition prediction are compared in application to transonic flow on an airfoil. An attempt was made to use LST and eN method for calculating the transition position based on the mean flow obtained with the help of ANSYS Fluent. Two-dimensional flow around RAE (NPL) 5212 airfoil was considered for M∞=0.5 and M∞=0....
Inviscid instability of nonsymmetric self-similar incompressible axial corner-layer flow at zero streamwise pressure gradient is considered. It is shown that the leading corner mode exhibits the maximum growth at least in a certain range of the streamwise wave number, outside of which the growth is overlapped by boundary-layer modes. The maximum gr...
A test rig designed for studying oscillating fluid flows in channels is described. The shape of pressure oscillations is defined by displacements of a piston whose motion is controlled by a stepping motor, the minimum step of the piston being 6 μm.
![Fig. 8. Layout of the setup for wave velocity measurements [24]: (1)...](profile/Victor-Kulik-2/publication/328805631/figure/fig5/AS:776033259233281@1562032155236/Layout-of-the-setup-for-wave-velocity-measurements-24-1-contact-area-of-the_Q320.jpg)
The main methods used to measure viscoelastic properties of materials in a wide range of frequencies from 10⁻⁴ to 10⁶ Hz are reviewed. It is demonstrated that the accuracy of many experimental methods can be increased by taking into account the form factors, which depend on the specimen type. An example of the form factor for a cylindrical specimen...
The influence of the low-frequency modulation of flow behind a rectangular backward-facing step on the amplitude characteristics of disturbances in the separated laminar boundary layer has been studied. The experimental data were obtained by the method of hot-wire anemometry in a wind tunnel at a low subsonic velocity. Response of the separated flo...
The possibility of drag reduction due to compliant coatings of viscoelastic silicone rubbers has been tested experimentally. For this purpose, a series of single-layer coatings of various thicknesses was made of a homogeneous material. The experiments were carried out in a high-speed cavitation tunnel of Pusan National University. Dynamic viscoelas...
A technique for analyzing the spatial stability of viscous incompressible shear flows in ducts of constant cross section, i.e., a technique for the numerical analysis of the stability of such flows with respect to small time-harmonic disturbances propagating downstream is described and justified. According to this technique, the linearized equation...
The effectiveness of local forcing by periodic blowing/suction through a thin transverse slot to alter the properties of an incompressible turbulent boundary layer is considered. In the first part of the review the effectiveness of the forcing through a single slot is discussed. Analysis of approaches for experimental modeling of the forcing, inclu...
Symmetric and asymmetric self-similar flows of a viscous incompressible fluid along a semi-infinite right-angle dihedral corner with a preset streamwise pressure gradient have been considered. Equations describing such flows in the framework of boundary layer approximation have been derived. The asymptotic behavior of solutions of the derived equat...
An overview and synthesis of researches on development of local vortical disturbances in laminar separated flows downstream of backward-facing steps, in which the velocity field depends essentially on two variables are given. Peculiarities of transition to turbulence in such spatially inhomogeneous separated zones are discussed. The experimental da...
The work is aimed at developing methods of numerical simulation of incompressible non-symmetric flow in streamwise corner by solving the Navier–Stokes equations with ANSYS Fluent and the self-similar equations of boundary-layer type. A comparison of the computations with each other and experimental data is provided.
Problems of experimental modeling of the process of air blowing into turbulent boundary layer of incompressible fluid through finely perforated wall are discussed. Particular attention is paid to the analysis of both the main factors responsible for the effectiveness of blowing and the possibility of studying the factors in artificially generated t...
The problem of asymmetric incompressible axial flow in a corner formed of two intersecting plates at a right angle is considered. The asymptotic behaviour of the flow far away from the corner is analysed. Two types of asymptotic behaviour are found. It is shown that the flow is very sensitive to the asymmetry parameter. A comparison of the results...
The results of an experimental study of the effect of single-layer monolithic compliant coatings on friction in a turbulent boundary layer are presented. The techniques of manufacturing the coating and measuring their properties are described. A special test model (a section of a wing section of an infinite span) to be used in experiment was design...
Calculation results are presented for the form factor of a flat ring in a linear formulation of the theory of elasticity. The form factor accounts for the influence of the sample dimensions and Poisson’s ratio on the modulus of elasticity being measured. The two-dimensional problem of elastic deformation of a ring with boundary conditions specified...
The accuracies of measuring the velocity field using clinical and research magnetic resonance imagers are compared. The flow velocity of a fluid simulating blood in a carotid artery model connected to a programmable pump was measured. Using phase-contrast magnetic resonance tomography, the velocity distributions in the carotid artery model were obt...
As a result of long-standing studies of subsonic flows past 2D surface imperfections, physical models to describe the influence of such elements on the boundary-layer transition to turbulence were formulated. The models are primarily based on stability properties of the flow around local geometrical variations of the wall. The present review discus...
A combined theoretical and numerical analysis of an experiment devoted to the excitation of Görtler vortices by localized stationary or vibrating surface nonuniformities in a boundary layer over a concave surface is performed. A numerical model of generation of small-amplitude disturbances and their downstream propagation based on parabolic equatio...
Laminar boundary layer separation in conditions of localized heat transfer is investigated at low subsonic velocity through wind-tunnel measurements and linear stability analysis. A backward-facing step flow is subjected to a stationary temperature variation generated by Peltier elements installed on the test model directly downstream of the separa...
Evolution equations of small disturbances aimed to compute the location of a laminar–turbulent transition in boundary layers by the eN-method taking into account the compressibility and heat transfer are described and justified for aerodynamic applications. The results of computation of N-factors and transition locations with the use of locally-par...
In this study, the drag reduction capabilities of compliant coatings made from viscoelastic silicon rubbers are verified experimentally. A series of single-layer compliant coatings of homogeneous materials with constant thicknesses were used. The experiments were performed at different flow velocities in a high-speed water tunnel of Pusan National...
Drag reduction capabilities of compliant coatings has long been of a verification issue in experimental fluid mechanics. In this paper, an optimal flow velocity range leading to maximum interaction between coatings and the flow is predicted based on viscoelastic material properties coating. The prediction is performed using a semi-empirical model,...
Modern achievements, status, and prospects of studies on reducing the turbulent friction and aerodynamic drag with the help of the blowing through a permeable wall are discussed. The main focus is placed upon a physical modeling of the process of boundary layer blowing in the framework of the dimensional theory, a critical analysis of experimental...
We have experimentally investigated the characteristics of an incompressible turbulent boundary layer on a plane plate upon the passive blowing of air through a fine-perforated surface and flushing it by supplying an external pressure flow through a wind tunnel using an intake device equipped with an attachment for draining the boundary layer on th...
A generalized analysis of the results of numerical and experimental studies of air blowing into a turbulent boundary layer through finely perforated surface consisting of alternating permeable and impermeable sections of varying length providing a sudden change in the flow conditions at the boundaries of these sections is presented. The air blowing...
The results of experimental and numerical investigations of the efficiency of control by an incompressible turbulent boundary layer with the help air blowing through a permeable wall fabricated with maintenance of most of the necessary requirements for the quality and configuration of microapertures and having a low effective roughness are analyzed...
In our experiments, we investigate a flow of a viscous fluid in the model of the common carotid artery bifurcation. The studies are carried out using three hardware equipments: two magnetic resonance scanners by Philips and Bruker, and intravascular guidewire ComboWire. The flux is generated by a special pump CompuFlow that is designed to reproduce...
The study is directed to formulate physical models adequate to describe mechanisms of interactions of compliant walls of pipes and hydrodynamic disturbances aiming to reveal the conditions responsible for hydrodynamic instability in hemodynamic problems.
