TY - JOUR
T1 - A nonlinear compressible flow disturbance formulation for adaptive mesh refinement wavepacket tracking in hypersonic boundary-layer flows
AU - Browne, Oliver M.F.
AU - Haas, Anthony P.
AU - Fasel, Hermann F.
AU - Brehm, Christoph
N1 - Publisher Copyright:
© 2022
PY - 2022/5/30
Y1 - 2022/5/30
N2 - An new numerical approach for simulating nonlinear wavepackets in hypersonic boundary-layers is presented. The adaptive mesh refinement wavepacket tracking (AMR-WPT) method has been developed as an efficient alternative to conventional direct numerical simulations (DNS). The AMR-WPT method employs the nonlinear disturbances equations (NLDE), an overset dual mesh approach with higher-order interpolation, and adaptive mesh refinement (AMR) to track wavepackets in hypersonic boundary-layer flows. After introducing the numerical details, the method is used to simulate linear and nonlinear wavepackets for an axisymmetric M=9.81 straight cone and 2-D/3-D M=5.35 flat plate boundary-layer. The simulation results are compared against classical stability and transition prediction tools, such as linear stability theory (LST), parabolized stability equations (PSE) and DNS. It is demonstrated that the AMR-WPT method requires only about 10% of the number of grid points when compared to DNS of a nonlinear wavepacket inside a hypersonic flat plate boundary-layer flow.
AB - An new numerical approach for simulating nonlinear wavepackets in hypersonic boundary-layers is presented. The adaptive mesh refinement wavepacket tracking (AMR-WPT) method has been developed as an efficient alternative to conventional direct numerical simulations (DNS). The AMR-WPT method employs the nonlinear disturbances equations (NLDE), an overset dual mesh approach with higher-order interpolation, and adaptive mesh refinement (AMR) to track wavepackets in hypersonic boundary-layer flows. After introducing the numerical details, the method is used to simulate linear and nonlinear wavepackets for an axisymmetric M=9.81 straight cone and 2-D/3-D M=5.35 flat plate boundary-layer. The simulation results are compared against classical stability and transition prediction tools, such as linear stability theory (LST), parabolized stability equations (PSE) and DNS. It is demonstrated that the AMR-WPT method requires only about 10% of the number of grid points when compared to DNS of a nonlinear wavepacket inside a hypersonic flat plate boundary-layer flow.
KW - Adaptive mesh refinement
KW - Boundary-layer stability
KW - Hypersonic boundary-layer transition
KW - Nonlinear disturbance formulation
KW - Wave packet tracking
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U2 - 10.1016/j.compfluid.2022.105395
DO - 10.1016/j.compfluid.2022.105395
M3 - Article
AN - SCOPUS:85127514034
SN - 0045-7930
VL - 240
JO - Computers and Fluids
JF - Computers and Fluids
M1 - 105395
ER -