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Hypersonic boundary-layer instability with chemical reactions

par Marxen, Olaf;Magin, Thierry ;Iaccarino, Gianluca;Shaqfeh, Eric
Référence 48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition(48: 2010), American Institute of Aeronautics and Astronautics
Publication Publié, 2010

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Résumé :

Numerical simulations of a hypersonic boundary layer on a flat plate with chemical reactions are carried out. For all computations, the mixture of gases is assumed to be in chemical and thermal equilibrium. The boundary layer is perturbed with a smallamplitude disturbance of fixed frequency, which gets amplified in streamwise direction. Two different approaches have been implemented and are verified here. In the first approach, gas properties are tabulated, and Lagrange interpolation is used to retrieve the desired values during time advancement of the Navier-Stokes equations. In the second approach, the Navier-Stokes solver is directly coupled with a library to computing the gas properties based on kinetic theory. Since the table used in the first approach has been computed using the same library, result obtained from both approaches match closely. A comparison of simulation data with linear stability results reported in the literature shows good agreement with respect to disturbance amplification rate, phase velocity as well as amplitude and phase functions.