Chemical nonequilibrium effects in the wake of an obstacle in hypersonic boundary-layer flows
Chemical nonequilibrium effects in the wake of an obstacle in hypersonic boundary-layer flows
复制标题
高超声速边界层流中障碍物后的化学非平衡效应
DOI：
10.1051/eucass/201203267
复制
发表时间：
2012
影响因子：
1.6
通讯作者：
C. Stemmer
中科院分区：
文献类型：
--
作者：
M. Birrer;C. Stemmer
Various complex flow features occur in reentry scenarios. This paper aims to investigate the influence of chemical nonequilibrium effects on the wake of a cuboid obstacle, sized about half the boundary layer thickness, in hypersonic boundary layer flows. The geometry here was chosen according to NASA HyBoLT experiment as explained in [1], where the basic shape is a wedge with a half angle of 6°. The freestream flow was chosen to have atmospheric conditions at an altitude of 42.5 km and a Mach number of 8.5. Simulations were obtained with 3 different gas models, a caloric one, one assuming chemical equilibrium, and the last considering chemical nonequilibrium. Two-dimensional (2D) direct numerical simulation (DNS) was used over the whole domain to extract inflow profiles for three-dimensional (3D) DNS of a reduced domain.
