Harmonic linearized Navier-Stokes equation on describing the effect of surface roughness on hypersonic boundary-layer transition

2019 ◽  
Vol 31 (3) ◽  
pp. 034108 ◽  
Keyword(s):  
Boundary Layer ◽  
Surface Roughness ◽  
Stokes Equation ◽  
Boundary Layer Transition ◽  
Navier Stokes ◽  
Hypersonic Boundary Layer ◽  
Navier Stokes Equation ◽  
Layer Transition ◽  
Effect Of Surface

Effect of Surface Roughness on Conjugate Heat Transfer of a Turbine Vane

2016 ◽  
Author(s):  
Hongyang Li ◽  
Yun Zheng
Keyword(s):  
Heat Transfer ◽  
Boundary Layer ◽  
Surface Roughness ◽  
Suction Side ◽  
Transition Process ◽  
Considerable Effect ◽  
Boundary Layer Transition ◽  
Layer Transition ◽  
Turbine Vane ◽  
Effect Of Surface

For the purpose of researching the effect of surface roughness on boundary layer transition and heat transfer of turbine blade, a roughness modification approach for γ-Reθ transition model was proposed based on an in-house CFD code. Taking surface roughness effect into consideration, No. 5411 working condition of Mark II turbine vane was simulated and the results were analyzed in detail. Main conclusions are as follows: Surface roughness has little effect on heat transfer of laminar boundary layer, while has considerable effect on turbulent boundary layer. Compared with smooth surface, equivalent sand roughness of 100μm increases the temperature for about 28.4K on suction side, reaching an increase of 5%. Under low roughness degree, effect of shock wave dominants on boundary layer transition process on suction side, while above the critical degree, effect of surface roughness could abruptly change the transition point.

Effect of surface cooling on second-mode dominated hypersonic boundary layer transition

2021 ◽  
Vol 62 (7) ◽  
Author(s):  
Ryan Oddo ◽  
Jonathan L. Hill ◽  
Mark F. Reeder ◽  
Daniel Chin ◽  
Joshua Embrador ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Boundary Layer Transition ◽  
Hypersonic Boundary Layer ◽  
Surface Cooling ◽  
Layer Transition ◽  
Second Mode ◽  
Effect Of Surface

scholarly journals Effect of Surface Roughness Geometry on Boundary-Layer Transition and Far-Field Noise

AIAA Journal ◽  
2021 ◽  
pp. 1-13
Author(s):  
Qingqing Ye ◽  
Francesco Avallone ◽  
Daniele Ragni ◽  
Meelan Choudhari ◽  
Damiano Casalino
Keyword(s):  
Boundary Layer ◽  
Surface Roughness ◽  
Boundary Layer Transition ◽  
Far Field ◽  
Layer Transition ◽  
Field Noise ◽  
Effect Of Surface

scholarly journals Effect of Surface Roughness on Boundary Layer Transition and Far Field Noise

2019 ◽  
Author(s):  
Qingqing Ye ◽  
Francesco Avallone ◽  
Daniele Ragni ◽  
Meelan M. Choudhari ◽  
Damiano Casalino
Keyword(s):  
Boundary Layer ◽  
Surface Roughness ◽  
Boundary Layer Transition ◽  
Far Field ◽  
Layer Transition ◽  
Field Noise ◽  
Effect Of Surface
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