Dmitriy M. Markovich

Dmitriy M. Markovich
Russian Academy of Sciences | RAS

Doctor of Philosophy, Professor

About

189
Publications
27,115
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2,028
Citations
Additional affiliations
January 2000 - October 2013
Novosibirsk State University
Position
  • Professor (Full)

Publications

Publications (189)
Article
The three-dimensional structure of the flow in the near field of a wake behind a cylinder in a slot channel was experimentally investigated. Based on direct measurements of three-component volumetric velocity distributions, the averaged flow structure in a wake behind the cylinder is presented for the cylinder height-to-diameter ratio of 0.4 and Re...
Article
Full-text available
The decay of a two-dimensional solitary wave into three-dimensional waves in film flow along a vertical plate has been studied using a high-speed laser-induced fluorescence technique that allows high spatial and temporal resolution measurements of the thickness of wave liquid films. It has been shown that the three-dimensional wave packet resulting...
Article
This paper presents the results of experimental studies of the spatial flow structure and coherent structures in the initial region of swirling jets at a Reynolds number of 5000 and different swirl rates. The contribution of these structures to the turbulent transport of momentum and mass was first quantitatively evaluated. In addition, for the cas...
Article
The wavy structure of a liquid film sheared by high-velocity gas flow with droplet entrainment from the film surface has been investigated. The paper presents an analysis of methods for measuring the local fluid film thickness and a review of classical concepts of the wave hydrodynamics of annular dispersed flow obtained in early studies using rath...
Article
Full-text available
This review is devoted to the analysis of the history and current trends in the development of the velocimetry method based on particle images for an aerodynamic experiment. The authors consider the basics of the method, various implementations, former and current status of equipment. Special attention is paid to the methods of data processing and...
Article
Full-text available
We report on a study of the impact of coherent helical vortex structures on the shape of the reaction zone and heat release in swirling methane/air flames in regimes with a vortex breakdown. Three kinds of atmospheric flames are considered, viz., fuel-lean and fuel-rich premixed flames and a partially premixed fuel-rich lifted flame. Based on the m...
Article
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Currently used recycling technologies have limitations on the composition of recyclable waste, which makes them specialized. Thus, the preliminary sorting of municipal solid waste is a necessary step, increasing the efficiency of using municipal solid waste as a resource. To sort municipal solid waste we developed a method for detecting and classif...
Article
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Elaboration of a predictive and well validated kinetic mechanism for combustion of H 2 /CO mixtures is the key to development of advanced technologies for effective syngas burning in power generation systems. Moreover, understanding the combustion chemistry of H 2 /CO mixtures is a prerequisite for a comprehensive description of hydrocarbons chemis...
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The evolution of thin liquid films sheared by a co-current gas flow in a vertical cylindrical channel with an internal diameter of 11.7 mm was studied using a high-speed implementation of the laser-induced fluorescence method. The main purpose of the work was to study the characteristics of the waves during the transition from the gravitational to...
Article
Modern aviation industry solves the problem of developing multifunction engines capable of flying both at subsonic and supersonic speeds. An important part in such engines is a variable area nozzle, which allows varying the geometry of the engine exhaust unit and, accordingly, its technical characteristics. This study touches upon an computer visio...
Article
Full-text available
The results of an experimental study of the waves on the surface of a vertically falling liquid film in the range of the Reynolds numbers of film flow 80 < Re < 420 have been presented. The experiments have been carried out with the use of the field optical diagnostic methods with high spatial and time resolution. Generation of capillary ripples wi...
Conference Paper
This paper reports on the investigation of coherent structures in a high-swirl jet with vortex breakdown (Re = 5 000) and combustion of a methane/air mixture (with equivalence ratio equal to 0.7 and 1.4). The measurements were performed by combined application of the stereo PIV, OH PLIF and HCHO PLIF techniques. The velocity data were processed by...
Conference Paper
Cavitation is one of the main sources of flow instabilities arising during the operation of hydraulic equipment and is also a cause of erosion wear of its operating elements. In this regard, the elaboration and development of various methods of cavitating flow control is an urgent problem for hampering cavitation evolution and reducing its negative...
Conference Paper
The present paper reports on the measurements of flow structure and heat transfer in swirling jets, impinging normally on a flat heated wall. Velocity field is measured by using the stereoscopic particle image velocimetry technique, whereas the wall temperature is monitored by IR imaging. Two cases of distances between the jet nozzle and impingemen...
Article
The initial stage of downward co-current annular flow was studied using two optical techniques: brightness-based laser-induced fluorescence technique and shadow technique. The experiments were conducted in a circular pipe and in a rectangular duct. The working area was represented by the first few centimetres from liquid inlet; the latter was organ...
Article
This paper describes an experimental study of the spatial structure of the chemical reaction zone in turbulent swirling flames by planar laser-induced fluorescence of formaldehyde (HCHO). Combustion of the methane–air mixture at atmospheric pressure is considered for different values of the equivalence ratio φ: inverted cone flames for φ = 0.7 and...
Article
Results of an experimental study of the spatial structure of a reacting flow during combustion of a propane–air mixture in a turbulent swirling jet escaping into atmospheric air are presented. The fuel-to-air equivalence ratio is φ = 0.7, and the Reynolds number of the jet is Re = 5 · 10³. The time-averaged spatial distributions of velocity, local...
Article
Investigation results on unsteady flow dynamics in a gaseous jet flame with strong swirl, vortex breakdown, and precession of a vortex core obtained by panoramic optical methods are presented, as well as the results of theoretical analysis of the fastest growing modes of hydrodynamic instability. Characteristics of the most unstable self-oscillatin...
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Full-text available
An experimental investigation is performed in order to compare the time-averaged spatial structure of low- and high-swirl turbulent premixed lean flames by using the particle image velocimetry and spontaneous Raman scattering techniques. Distributions of the time-average velocity, density and concentration of the main components of the gas mixture...
Article
The spatial-density distribution in burning a premixed methane–air swirling turbulent jet has been studied by measuring the intensity of the Stokes branch of spontaneous Raman scattering for vibrational–rotational transitions in nitrogen. An optical system comprising a Nd:YAG laser and the liquid-crystalline Lyot–Ehman tunable filter has been creat...
Article
We report on the experimental investigation of cavitating flow control over a 2D model of guide vanes of a Francis turbine by means of a continuous tangential injection of liquid along the foil surface. The generated wall jet, providing supplementary mass and momentum, issues from a nozzle chamber inside the hydrofoil through a spanwise slot channe...
Article
Full-text available
Experimental study of wave evolution on the surface of isothermal liquid films falling down vertical plate conducted by means of field measuring system has revealed three typical scenarios of the evolution in the range of low and moderate liquid flow rates. At low liquid flow rates transverse modulation of 2D waves develops without formation of 3D...
Article
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The process of formation of disturbance waves in annular gas-liquid flow was studied using three-dimensional configuration of brightness-based laser-induced fluorescence technique in two ducts of different geometry in the proximity of the inlet. The process was found to consist of three stages: formation of initial two-dimensional high-frequency wa...
Article
Full-text available
Downstream development of disturbance waves properties in annular regime of gas - liquid flow was conducted in adiabatic air-water downwards flow in a vertical pipe with inner diameter of 11.7 mm. The measurements were conducted using brightness-based laser-induced fluorescence technique. Instantaneous distributions of local thickness of liquid fil...
Article
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Results of simultaneous liquid velocity and film thickness fields measurements in the three dimensional waves are presented. The three dimensional waves formed as a result of decay of the forced two dimensional waves were studied. Liquid velocity fields were reconstructed at different distance from the film surface with reference to the specific ar...
Article
Full-text available
The work explores the three-dimensional structure of the near field of a quasi-two-dimensional turbulent jet. The jet stream forms at an outflow from the rectangular channel with aspect ratio B/h equal to 1:2.5 into the channel, formed by two plane-parallel plates. The experiments were carried out for a wide range of Re number from 2 000 to 20 000....
Article
Full-text available
Jet flows are extensively used in various practical applications. Presently, the development of technical equipment where jets are employed is connected with the improvement and optimization of different methods of flow control. In the paper, an experimental investigation of the turbulent structure of forced bubbly free and impinging jets was carri...
Article
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We have simultaneously measured the velocity vector and film thickness fields in three-dimensional (3D) waves formed upon the decay of regular 2D waves on a liquid film flowing down a vertical plate. Velocity fields at various distances from the plate surface in various regions of a 3D wave are constructed. It is shown that the liquid flow in the w...
Article
Averaged fields of thickness of an isothermal vertically flowing liquid film, obtained by the laserinduced fluorescence method, have been analyzed. The chosen minimum averaging time interval, at which the wave motion is completely averaged, allows one to observe rivulet dynamics in a transverse direction. It is found that short-lived rivulets, whic...
Article
Using planar optical methods based on laser-induced fluorescence and particle image velocimetry instantaneous velocity fields and passive tracer concentration are measured simultaneously in a model of GT-combustor at realistic flow rates. Spatial distributions of velocity pulsations and passive tracer concentration pulsations are measured at air fl...
Article
Full-text available
For construction of portable aluminium-air batteries (AABs) for field applications the data on performance of such batteries at low temperatures are necessary. Such experimental data are presented in this article. Lower temperature limit for effective operation of portable AABs is estimated. Possibility of AABs self-heating to the desired temperatu...
Article
Full-text available
The onset of instabilities of various types, including those caused by cavitation, in ducts of hydraulic systems negatively affects the efficiency, reliability and safety of hydrotechnical and hydropower equipment. This fact makes it necessary to develop different means to control such flows. The main aim of the study is to determine the possibilit...
Article
Full-text available
We studied cavitating flow over the suction side of a symmetric 2D foil – a scaleddown model of high-pressure hydroturbine guide vanes (GV) – in different cavitation regimes at the attack angle of 3°. High-speed imaging was used to analyze spatial patterns and time dynamics of the gas-vapour cavities. A hydroacoustic pressure transducer was employe...
Article
Improvement of advanced technologies in the field of high-velocity hydrodynamics is strategically significant in terms of national security and stable and long-term growth of the economy due to regional development in Siberia and the Arctic, as well as support of Russia’s scientific and technological authority in the global arena. The practice of c...
Conference Paper
Full-text available
Настоящая статья носит обзорный характер и посвящена анализу истории и современным тенденциям развития панорамных оптических методов диагностики для аэродинамического эксперимента. Поскольку количество разработанных за последние несколько десятилетий методов крайне велико и охватить их в рамках одного обзора невозможно, в статье рассматриваются в о...
Article
Results of numerical simulation and experimental investigation of the working process of a vortex igniter-stabilizer are presented. It is shown that a high-temperature pulsating swirling jet provides reliable ignition of a fuel and its stable combustion at a main-flow velocity of up to 2.5 M.
Article
In the paper, the possibility of active control of a cavitating flow over a 2D hydrofoil that replicates a scaled-down model of high-pressure hydroturbine guide vane (GV) was tested. The flow manipulation was implemented by a continuous tangential liquid injection at different flow rates through a spanwise slot in the foil surface. In experiments,...
Conference Paper
To reduce NOx formation modern industrial power gas-turbines utilizes lean premixed combustion of natural gas. The uniform distribution of local fuel/air ratio in the combustion chamber plays one of the key roles in the field of lean combustion to prevent thermo-acoustic pulsations. Present paper reports on simultaneous Particle Image Velocimetry a...
Conference Paper
This paper presents an evaluation of the density distribution in swirling turbulent premixed flames. The measurement principle is based on registration of spontaneous Raman scattering, when the reacting gas flow is illuminated by a laser sheet. Evaluation of 1D and 2D distributions of density and temperature were performed in a laminar Bunsen flame...
Conference Paper
This paper reports on application of Stereo Particle Image Velocimetry (Stereo PIV) to measure flow characteristics at high-Reynolds number flow in turbine test facility. The test rig “TS-2” at The Central Institute of Aviation Motors was operated at the pressure up to 2.5 bar, temperature 450°C and flow rates up to 36 kg/s. The main goal of the st...
Article
For simultaneous measurement of instantaneous fields of temperature and velocity in the near-wall areas of the impinging jet combination of PLIF and PIV methods is implemented. The algorithms to reduce the measurement error of PLIF method are proposed. Unsteady heat transfer in axisymmetric jet impinging normally onto the plane heated surface is ex...
Article
Full-text available
Hydropower resources, used for power generation in hidraulic power plants, are one of the major renewable energy sources. A significant scientific and technical challenge for designing the equipment of hydroelectric power plants is cavitation caused by high velocity of water flow near the runner blades. Cavitation is also typical for other turbomac...
Article
We report on a parallel study on properties of large-scale vortical structures in low- and high-swirl turbulent jets by means of the time-resolved tomographic particle image velocimetry technique. The high-swirl jet flow is featured by a well-established bubble-type vortex breakdown with a central recirculation zone. In the low-swirl flow, the mean...
Article
Full-text available
We investigate a vertically discharged shallow wall-bounded turbulent water jet both experimentally (LIF, TomoPIV) and numerically (LES). We identify the well-known meandering motion of the jet core generating large-scale planar vortices similar to the Karman vortex street. The modulation of the meandering amplitude is identified in experiments and...
Article
This Letter presents the results of an experimental study of the wave regimes of the liquid film flow over the vertical plate within a range of moderate Reynolds numbers using liquids with different physical properties. The analysis of statistical characteristics of wave fields has made it possible to elaborate the classification of three-dimension...
Article
The paper reports on shape of a three-dimensional coherent structure in a velocity field of a high-swirl turbulent jet with the bubble-type vortex breakdown. A set of the 3D instantenous velocity fields was measured by using the tomographic particle image velocimetry (tomographic PIV) technique and processed by the proper orthogonal decomposition (...
Article
We present results of high-speed imaging of cavitation on sample NACA0015 hydrofoils with different levels of irregular roughness at two angles of incidence α = 3 and 9°, focusing on the effects of surface texture on cavity dynamics and patterns. Cavitation is shown to be governed not only by the arithmetical mean deviation (Ra) and average peak-to...
Article
It is shown that a suitable transformation in the transverse-coordinate shift makes the set of equations describing the flow of viscous fluid films in the long-wavelength approximation invariant with respect to the reflection transformation. When constructing the flow models with the Galerkin spectral method, this symmetry in the equation for the l...
Article
We studied cavitating flow over the suction side of two symmetric 2D foils – a NACA0015 hydrofoil and a scaled-down model of high-pressure hydroturbine guide vanes (GV) – in different cavitation regimes at several attack angles. High-speed imaging was used to analyze spatial patterns and time dynamics of the gas-vapor cavities, as well as for evalu...
Article
Full-text available
The present paper reports an application of optical methods, namely PIV, background-oriented-schlieren (BOS) and high-magnification imaging with background illumination to study of dynamics and breakup of 10-100 μm size droplets in continuous supersonic flow terminated by a normal shock wave. Flow diagnostics was performed by means of BOS and PIV....
Article
Full-text available
In the present work simultaneous velocity field and passive admixture concentration field measurements at realistic flow-rates conditions in a non-reacting flow in a model of combustion chamber with an industrial mixing device are reported. In the experiments for safety reasons the real fuel (natural gas) was replaced with neon gas to simulate stra...
Chapter
The current study reports on spatial structure of a global mode of self-sustaining oscillations in a turbulent swirling jet under vortex breakdown conditions. Ensembles of 2D and 3D velocity fields were measured by stereoscopic and tomographic PIV systems, respectively, and were analysed via proper orthogonal decomposition. For the 2D PIV, the spat...
Article
Full-text available
Cavitation on two symmetric foils, a NACA0015 hydrofoil and a scaled-down model of a Francis turbine guide vane (GV), was investigated by high-speed visualization and PIV. At small attack angles the differences between the profiles of the mean and fluctuating velocities for both hydrofoils were shown to be insignificant. However, at the higher angl...
Article
Wavy structure of downward annular gas–liquid flow with liquid entrainment in 15 mm pipe was studied using high-speed laser-induced fluorescence technique. Measurements were performed near the inlet, which was organized as a tangential slot. Spatiotemporal records of film thickness were obtained over the first 100 mm of the pipe length in order to...
Article
Full-text available
This article presents the results of experimental investigations of the process of transition from two-dimensional (2D) to three-dimensional (3D) waves in liquid films falling down a vertical plate. The method of laser induced fluorescence was used to obtain instant shapes of three dimensional waves and to investigate the regularities of formation...