High-temperature effects in hypersonic flows |
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Authors: | Dinesh K Prabhu |
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Affiliation: | (1) Computational and Theoretical Fluid Dynamics Division, National Aerospace Laboratories, 560 017 Bangalore, India |
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Abstract: | The hypersonic (M=25) flow past a 10° right circular cone at 0° angle of attack has been computed using an implicit, noniterative,
finite-difference scheme for the Parabolized Navier-Stokes (PNS) equations. Three different gas models have been considered
in the study — (1) ideal gas (γ = constant), (2) equilibrium air, and (3) five species (N2, O2, NO, N, O) chemical nonequilibrium air. For the nonequilibrium air case, three different models have been considered — (a)
one in which the constituent species have no internal structure (i.e., species are ideal gases), (b) one in which the constituent
species have internal structure (i.e., species are thermally perfect gases), and (c) one in which the species have internal
structure and their thermodynamic properties have been obtained from quantum mechanical and spectroscopic calculations. |
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Keywords: | Hypersonic flows chemical equilibrium/nonequilibrium flows planar/axisymmetric flows finite-difference formulation |
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