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首页> 外文期刊>Journal of Spacecraft and Rockets >Unstructured Multigrid Simulations of Turbulent Launch Vehicle Flows Including a Propulsive Jet
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Unstructured Multigrid Simulations of Turbulent Launch Vehicle Flows Including a Propulsive Jet

机译：包括推进射流的湍流运载火箭流的非结构化多网格模拟

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摘要

A study of the flowfield around axisymmetric launch vehicles in different flight conditions is performed. In particular, the first Brazilian Satellite Launcher second-stage configuration is analyzed considering the case with and without a propulsive jet in the vehicle base. The study is performed using a cell-centered finite volume formulation on unstructured grids. Different spatial discretization schemes are compared, including a centered and an upwind scheme. The upwind scheme is a second-order version of the Liou flux vector-splitting scheme. Turbulence effects are accounted for using two one-equation turbulence closure models, namely, the Baldwin and Barth and the Spalart and Allmaras models. An agglomeration multigrid algorithm is used to accelerate the converge to steady state of the numerical solutions. The numerical results obtained are compared with experimental data, as well as with previous structured grid simulations.
机译：对不同飞行条件下轴对称运载火箭周围的流场进行了研究。特别是，考虑到在车辆底座中是否装有推进式喷气机的情况，分析了巴西的第一种巴西卫星发射器第二阶段配置。该研究是在非结构化网格上使用以单元为中心的有限体积公式进行的。比较了不同的空间离散方案，包括居中方案和逆风方案。迎风方案是Liou通量矢量分裂方案的二阶版本。湍流效应是通过使用两个一方程式湍流闭合模型来解释的，即鲍德温和巴特以及斯帕尔特模型和阿尔玛拉斯模型。使用团聚多网格算法将数值解收敛到稳态。将获得的数值结果与实验数据以及以前的结构化网格模拟进行比较。

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