DMCA
1 A High-Order Cut-Cell Method for Numerical Simulation of Hypersonic-Boundary Transition with Arbitrary Surface Roughness
| Citations: | 3 - 0 self |
BibTeX
@MISC{Duan_1a,
author = {Le Duan and Xiaowen Wang and Xiaolin Zhong},
title = {1 A High-Order Cut-Cell Method for Numerical Simulation of Hypersonic-Boundary Transition with Arbitrary Surface Roughness},
year = {}
}
Share
 |
 |
 |
 |
||
OpenURL
Abstract
Hypersonic boundary-layer transition can be affected significantly by surface roughness. Many important mechanisms which involve transition induced by arbitrary roughness are not well understood. In this paper, we propose a new high-order cut cell method which combined the non-uniform finite difference method for discrete points near the curvilinear boundary and shock-fitting method for the bow shock. The receptivity process induced by interaction of Mach 5.92 flow over flat plate under the combination effect of two-dimensional surface roughness and blow-suction is investigated. Both steady state solutions and unsteady solutions have been obtained by using the new method. For steady flow with roughness, there is significant change inside the boundary layer with flow separation before and after the roughness element. For unsteady flow, the results for flow instability induced by both blow-suction slot and roughness are obtained and analyzed by Linear Stability Theory (LST). These results show that the roughness element with height to be half the boundary layer thickness may delay the hypersonic transition. I.
Keyphrases
hypersonic-boundary transition arbitrary surface roughness high-order cut-cell method numerical simulation roughness element flat plate unsteady flow new method steady flow surface roughness flow separation linear stability theory hypersonic boundary-layer transition blow-suction slot two-dimensional surface roughness combination effect shock-fitting method flow instability hypersonic transition boundary layer significant change receptivity process steady state solution unsteady solution new high-order cut cell method boundary layer thickness non-uniform finite difference method many important mechanism bow shock discrete point arbitrary roughness
