Numerical Simulation of Hypersonic Boundary Layer Receptivity, Transient Growth and Transition With Surface Roughness

Abstract

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Fluid Ablation Interactions on a Compression Ramp at Mach 8

“…Review articles on this past research have been compiled for studying laminar to turbulent transition [1][2][3][4] with roughness [5] as well as with ablation [6,7]. As for more recent studies from the past few years, notable contributions have been made in modeling GSI [8][9][10], performing laminar hypersonic simulations with ablation coupling [11][12][13], investigating stability and transition to turbulence in hypersonic flows [14][15][16][17][18][19] with roughness [20,21] or with blowing [22,23] and further with ablation [24][25][26][27][28], and in performing turbulent hypersonic simulations [29,30]. Moreover, there has also been a recently renewed interest for studying ablative shape change with low-temperature ablators [13,31,32] as they exhibit characteristics similar to that of real flight ablators at lower enthalpy conditions.…”

“…Moreover, there has also been a recently renewed interest for studying ablative shape change with low-temperature ablators [13,31,32] as they exhibit characteristics similar to that of real flight ablators at lower enthalpy conditions. There still exists large uncertainties in the predictions and interactions of various effects, and some phenomena such as transition control with roughness [20] is yet to be understood properly. Among all of these studies, use of direct numerical simulations (DNS) has been greatly influential in many of the aforementioned works due to the lack of reliable data in this field as ground testing cannot simultaneously replicate all aspects of atmospheric entry environments, and flight tests are rare.…”