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CFD Simulations of the IHF Arc-Jet Flow: Compression- Pad/Separation Bolt Wedge Tests

机译:IHF电弧射流的CFD模拟:压垫/分离螺栓楔形测试

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This paper reports computational analyses in support of two wedge tests in a high enthalpy arc-jet facility at NASA Ames Research Center. These tests were conducted using two different wedge models, each placed in a free jet downstream of a corresponding different conical nozzle in the Ames 60-MW Interaction Heating Facility. Each panel test article included a metallic separation bolt imbedded in Orion compression-pad and heatshield materials, resulting in a circular protuberance over a flat plate. The protuberances produce complex model flowfields, containing shock-shock and shock-boundary layer interactions, and multiple augmented heating regions on the test plate. As part of the test calibration runs, surface pressure and heat flux measurements on water-cooled calibration plates integrated with the wedge models were also obtained. Surface heating distributions on the test articles as well as arc-jet test environment parameters for each test configuration are obtained through computational fluid dynamics simulations, consistent with the facility and calibration measurements. The present analysis comprises simulations of the nonequilibrium flowfield in the facility nozzle, test box, and flowfield over test articles, and comparisons with the measured calibration data.
机译:本文报告了在美国国家航空航天局艾姆斯研究中心的高焓电弧喷射设备中进行的两次楔形测试所支持的计算分析。这些测试是使用两个不同的楔形模型进行的,每个模型都放置在Ames 60 MW互动加热设施中相应的不同锥形喷嘴下游的自由射流中。每个面板测试物品都包括一个嵌入Orion压垫和热屏蔽材料中的金属分隔螺栓,从而在平板上形成圆形突起。突起产生复杂的模型流场,其中包含冲击-冲击和冲击-边界层相互作用,以及测试板上的多个增加的加热区域。作为测试校准过程的一部分,还获得了与楔形模型集成在一起的水冷校准板上的表面压力和热通量测量结果。通过计算流体动力学模拟,获得与设备和校准测量结果一致的测试物品上的表面加热分布以及每种测试配置的电弧喷射测试环境参数。本分析包括设备喷嘴,测试箱中非平衡流场的模拟以及测试物品上的流场,并与测得的校准数据进行比较。

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