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首页> 美国政府科技报告 >Implementation of a Chemical and Thermal Nonequilibrium Flow Solver onUnstructured Meshes and Application to Blunt Bodies
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Implementation of a Chemical and Thermal Nonequilibrium Flow Solver onUnstructured Meshes and Application to Blunt Bodies

机译：在结构网格上实现化学和热非平衡流动求解器及其在钝体上的应用

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This paper presents a nonequilibrium flow solver, implementation of the algorithmon unstructured meshes, and application to hypersonic flow past blunt bodies. Air is modeled as a mixture of five chemical species, namely O2, N2, O, NO, and N, having two temperatures namely translational and vibrational. The solution algorithm is a cell centered, point implicit upwind scheme that employs Roe's flux difference splitting technique. Implementation of this algorithm on unstructured meshes is described. The computer code is applied to solve Mach 15 flow with and without a Type IV shock interference on a cylindrical body of 2.5mm radius representing a cowl lip. Adaptively generated meshes are employed, and the meshes are refined several times until the solution exhibits detailed flow features and surface pressure and heat flux distributions. Effects of a catalytic wall on surface heat flux distribution are studied. For the Mach 15 Type IV shock interference flow, present results showed a peak heat flux of 544 MW/m2 for a fully catalytic wall and 431 MW/m(exp 2) for a noncatalytic wall. Some of the results are compared with available computational data.

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