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Numerical Simulations of the FIRE-II Convective and Radiative Heating Rates

机译:火灾 - II对流和辐射加热率的数值模拟

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Numerical simulations of axisymmetric flows over the FIRE-II spacecraft at reentry conditions using a Navier-Stokes solver being developed at the University of Michigan are presented. The finite-volume method is used to solve the set of differential equations. The code has the capability to handle any mix of hexahedra, tetrahedra, prisms and pyramids in 3D or triangles and quadrilaterals in 2D. Numerical fluxes between the cells are discretized using a modified Steger-Warming Flux Vector Splitting which has low dissipation and is appropriate to calculate boundary layers. A point or line implicit method is used to perform the time integration. The computed convective heating rates are in good agreement to other numerical results and are consistent with total heat transfer flight measurements. The radiative heating rates, computed using NASA's NEQAIR code, are also in good agreement with results obtained previously.
机译:展示了在密歇根大学开发的Navier-Stokes Solver的ReEntry条件下的Fire-II航天器上的轴对称的数值模拟。有限体积方法用于解决差分方程集。该代码具有在2D中以3D或三角形和三边形的任何六覆症,四面体,棱镜和金字塔处理任何混合的能力。使用具有低耗散的改进的标记 - 变暖通量矢量分裂,电池之间的数值通量被离散化,并且适合计算边界层。点或行隐式方法用于执行时间集成。计算的对流加热速率与其他数值结果吻合良好,并且与总传热飞行测量一致。使用NASA的NEQAIR代码计算的辐射加热速率也与先前获得的结果一致。

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