[Updated on Apr. 18] Integration of CiNii Articles into CiNii Research

Three-Dimensional Hypersonic Aeroheating Computations Associated with Cross-Flow Jet Interactions

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  • 横断噴流空力干渉を伴う三次元極超音速空力加熱の数値計算

Abstract

<p>Hypersonic aeroheating is one of challenging tasks in the modern Computational Fluid Dynamics (CFD), partly due to difficulties in accurate capturing of shockwaves and thermal boundary-layers, and partly due to lack of the reference data. We have tackled this problem by computationally reproducing the heating created by a hypersonic-flow/cross-flow-jet aerodynamic interaction. In the first half of this work, we surveyed both numerical flux functions and computational grids, and reached the conclusion that both AUSM+-up2 and SLAU2 successfully yielded analytical heating values with symmetry profiles over a blunt-body at Mach 8.1 (without the jet), as long as the minimum cell size was set small enough (cell-Reynolds-number being 0.32 or smaller). Then the second half was dedicated to the cross-flow-jet interaction. Using AUSM+-up2, we again succeeded in simulating the jet-interaction-induced aeroheating and pressure augmentations and their distributions, as well as complicated three-dimensional flow structures. Furthermore, a new heating mechanism not tied to pressure increase has been identified. These pieces of information are expected to serve as one of guidelines for hypersonic CFD, new insights into hypersonic flow physics, and also additional data for validation purposes.</p>

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