Tran The Hung

Tran The Hung
Le Quy Don Technical University · Department of Aerospace Engineering

Doctor of Engineering

About

24
Publications
2,669
Reads
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58
Citations
Introduction
I received Ph.D at Tohoku University, Japan in 2019. My study focuses on experimental aerodynamic, optical-flow and data processing technique.

Publications

Publications (24)
Chapter
In this paper, bending analysis of functionally graded carbon nanotubes reinforced composite (FG-CNTRC) cylindrical shell was presented using higher-order shear deformation theory (HSDT) taking transverse normal stress effect into account. Effective material properties of FG-CNTRC were estimated by the rule of mixture. The principle of virtual work...
Chapter
This study presents a mathematic algorithm for determining position of the model in three dimensional surface. The work is important for robotic vision, where the role of robotic increases in our life and industry. We showed that the technique can detect positions and surface of the model well. Details of the technique and discussions are presented...
Article
The flow-induced rotation of the modified Savonius rotor, for which the blade consists of a semicircular profile and an elliptical shape, is studied using a series of unsteady computational fluid dynamics (CFD) simulations. The present study first concentrates on the validation of the numerical scheme against Blackwell's experimental data of the co...
Article
A numerical study is performed to simulate the cavitating flow, evaluating the applicability of different flow fluctuation pressure (FFP) models such as the Singhai FFT model, the modified Singhal FFT model, the shear strain model, and the present shear strain-vorticity model. The axisymmetric blunt-body with the availability of experimental data i...
Chapter
In this study, flow behavior around an axisymmetric boattail model was presented at different Mach number from subsonic to supersonic flow. Reynolds averaged Navier-Stokes equations with k-ω SST model was applied for the simulation. Results were validated with previous relevant experimental data for validation. The results indicated that the numeri...
Article
This study proposes and investigates the impact of a modification, accounting for the influence of vortices and flow properties on the liquid rupture, to improve the modeling of mass transfer rate in cavitation. The threshold phase-change pressure is calculated by the fluid-saturated pressure at rest and the added vortex pressure term. The explicit...
Article
In this study, skin friction around a ½-scale Ahmed body was measured experimentally at a Reynolds number of Re = 2×105. The slant angle of the Ahmed body was 25° and the yaw angles ranged from 0° to 8°. This study focused on the flow structure on the slant surface under different cross-wind conditions. A force balance system was applied to measure...
Article
The cavitating flow on a NACA0015 hydrofoil in water under a wide range of temperatures is simulated with or without non-condensation gas using a homogeneous model. Our simplified thermodynamic model is coupled with governing equations to capture the latent heat transfer in cavitation. A numerical evaluation proves its applicability through a compa...
Article
Flow behavior around axisymmetric boattail surface was studied by numerical methods. A wide range of boattail angles from 0° to 24° was investigated to find the drag trend of the model. Numerical simulation was validated by experimental results with the same flow conditions. Results showed that the use of boattail model always has a positive effect...
Article
In this study, we developed a novel optical-flow algorithm for determining the wall shear-stress on the surface of objects. The algorithm solves the thin-oil-film equation using a numerical scheme that recovers local features neglected by smoothing filters. A variational formulation with a smoothness constraint was applied to extract the global she...
Preprint
In this study, we developed a novel optical-flow algorithm for determining the wall shear-stress on the surface of objects. The algorithm solves the thin-oil-film equation using a numerical scheme that recovers local features neglected by smoothing filters. A variational formulation with a smoothness constraint was applied to extract the global she...
Article
In this study, ability of an optical-flow algorithm in extracting wake structure of axisymmetric model was investigated. The initial data for optical-flow processing was obtained in low-speed conditions by particle image velocimetry (PIV) method. The Reynolds number based on the model diameter was around ReD = 1.97×104 in this study. Both the time-...
Article
Full-text available
The effect of a boattail angle on the structure of the wake of an axisymmetric model was investigated at low-speed condition. Four conical boattail models with angles of 0° (blunt-based body), 10°, 16°, and 22° were selected for this study. The Reynolds number based on the diameter of the model was around 1.97 × 10 4 . Particle image velocimetry (P...
Article
Particle image velocimetry (PIV) measurement is an important technique in analyzing velocity fields. However, in traditional cross-correlation algorithm, the resolution of velocity fields is limited by the size of interrogation windows and the boundary layer was not captured well. In this study, single-pixel ensemble correlation algorithm was appli...
Article
Full-text available
The effect of Reynolds number on flow behaviors and pressure drag around axisymmetric conical boattails was experimentally investigated at low-speed conditions. Four conical boattails with slant angles of 12°, 16°, 20°, and 22° were studied. The Reynolds number ranged from 4.34 × 10⁴ to 8.89 × 10⁴ based on the model diameter. The global-luminescent...
Article
Full-text available
This study is focused on the effect of boattail angle on the pressure distribution and drag force of axisymmetric afterbodies under low-speed conditions. Experiments were conducted on three conical boattails with angles of 10°, 14° and 20°. The diameter-based Reynolds number is approximately 4.3 × 10⁴ under the experimental conditions. Two types of...
Conference Paper
In this study, the effect of boattail shape on aerodynamic drag of an ogive-cylinder model was investigated using the 0.3-m Magnetic Suspension and Balance System. The drag of a model with boattail angles of 10º, 14º and 20º was measured at the velocity of 22 m/s under free levitation condition. The results show that boattail angle of 14º provides...
Conference Paper
The paper presents methods for determining the mathematical model of a control object, which is an unscrewed aerial vehicle typed Quadrotor. The paper goes deeply into analyzing identifying algorithm, evaluating, applying possibility and proving the feasibility of the algorithm by comparing reaction of the system with a received mathematical model...
Conference Paper
Delta wing is used for hypersonic flying object. The specific feature of delta wing by comparison with normal wing is that, the lift is created not only by potential flow but also by vortex flow. There are two vortexes along the leading-edge. If the wing is in stability regime, the lift creating by the vortexes helps increase total lift and stall a...
Conference Paper
Active flow is effective method to control flow near an airfoil. The flow can be created in many ways. Plasma circulation control technique overcomes disadvantage of other method and is used in the paper as active flow to control separation in the airfoil NACA 2415 with speed of free-stream V=50m/s. Gambit software is used to create mesh while Flue...
Conference Paper
Contracting takeoff and landing runway that brings a huge benefit of building airports especially in tropical countries and on military purpose, is common object in over the world. For creative short takeoff and landing airplane we used powered lift-augmentation system. The system helps increasing lift force by comparison with conventional takeoff...

Questions

Question (1)
Question
I am planning to use Titanium Dioxide and Oleic acid for flow visualization at velocity from 5 to 50 m/s, but I do not know about the composition of them.
Could anyone who has experience of the technique help me?

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