超音速/極超音速で飛行する火星突入カプセル周りの流れ構造の数値解析

概要

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Numerical solutions for supersonic/hypersonic flows of carbon-dioxide around a Mars Environmental Survey (MESUR) capsule have been computed utilizing a new computational method of compressible flows based on the finite element method (FEM). In this simulation, two different Mars's atmospheres are used to confirm the effects of atmospheric pressure change on the flowfield around capsule, and the computations are carried out for four points on a trajectory of the capsule at Mach numbers of 2, 3, 5, and 10. By these simulations, differences of the flow structures for effects of atmospheric pressure change and various Mach numbers are clarified. The computational results show that the location of the separation behind the capsule is governed by the strength of the reverse pressure gradient. The reverse flow behind the capsule that determines the value of the base pressure distribution is correlated to the strength of the re-circulation region.
福山大学の論文