scholarly journals Numerical Study on Super/Hypersonic Flow, Mixing, and Combustion Phenomena

2014 ◽  
Vol 6 ◽  
pp. 765315
Author(s):  
Bing Wang ◽  
X. Y. Hu ◽  
Xinliang Li ◽  
Qiang Wang
Keyword(s):  
Hypersonic Flow ◽  
Numerical Study ◽  
Flow Mixing

scholarly journals Numerical study on super/hypersonic flow, mixing, and combustion phenomena, 2015

2016 ◽  
Vol 8 (2) ◽  
pp. 168781401663293
Author(s):  
Bing Wang ◽  
Xiangyu Hu ◽  
Xinliang Li ◽  
Qiang Wang
Keyword(s):  
Hypersonic Flow ◽  
Numerical Study ◽  
Flow Mixing

A Numerical Study of Heat Transfer and Flow Structure in Channels With Miniature V Rib-Dimple Hybrid Structure on One Wall

2018 ◽  
Author(s):  
Peng Zhang ◽  
Yu Rao ◽  
Yanlin Li
Keyword(s):  
Heat Transfer ◽  
Turbulent Flow ◽  
Numerical Simulations ◽  
Numerical Study ◽  
Reynolds Numbers ◽  
Hybrid Structure ◽  
Transfer Enhancement ◽  
Nusselt Numbers ◽  
Flow And Heat Transfer ◽  
Flow Mixing

This paper presents a numerical study on turbulent flow and heat transfer in the channels with a novel hybrid cooling structure with miniature V-shaped ribs and dimples on one wall. The heat transfer characteristics, pressure loss and turbulent flow structures in the channels with the rib-dimples with three different rib heights of 0.6 mm, 1.0 mm and 1.5 mm are obtained for the Reynolds numbers ranging from 18,700 to 60,000 by numerical simulations, which are also compared with counterpart of a pure dimpled and pure V ribbed channel. The results show that the overall Nusselt numbers of the V rib-dimple channel with the rib height of 1.5 mm is up to 70% higher than that of the channels with pure dimples. The numerical simulations show that the arrangement of the miniature V rib upstream each dimple induces complex secondary flow near the wall and generates downwashing vortices, which intensifies the flow mixing and turbulent kinetic energy in the dimple, resulting in significant improvement in heat transfer enhancement and uniformness.

scholarly journals AERODYNAMIC MODELING OF OSCILLATING WING IN HYPERSONIC FLOW: A NUMERICAL STUDY

2016 ◽  
Vol 42 ◽  
pp. 1660177
Author(s):  
JIAN ZHU ◽  
YING-YU HOU ◽  
CHEN JI ◽  
ZI-QIANG LIU
Keyword(s):  
Mach Number ◽  
Hypersonic Flow ◽  
Numerical Study ◽  
Unsteady Aerodynamics ◽  
Order Theory ◽  
Second Order ◽  
Double Wedge ◽  
Piston Theory ◽  
Impact Theory ◽  
Cfd Method

Various approximations to unsteady aerodynamics are examined for the unsteady aerodynamic force of a pitching thin double wedge airfoil in hypersonic flow. Results of piston theory, Van Dyke’s second-order theory, Newtonian impact theory, and CFD method are compared in the same motion and Mach number effects. The results indicate that, for this thin double wedge airfoil, Newtonian impact theory is not suitable for these Mach number, while piston theory and Van Dyke’s second-order theory are in good agreement with CFD method for Ma<7.

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