Experimental and computational determination of the VKI Plasmatron operating envelope
Experimental and computational determination of the VKI Plasmatron operating envelope
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VKI Plasmatron 工作范围的实验和计算确定
DOI：
10.2514/6.1999-3607
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
M. Carbonaro
中科院分区：
文献类型：
--
作者：
B. Bottin;S. Paris;V. V. D. Haegen;M. Carbonaro
本文件涉及的等离子体发生器设施，设计和建造在冯K&M&N流体动力学研究所作为欧洲航天局的测试台进行测试的TPS材料在飞行中使用之前的工作包络线的实验测定。因此，该设施的首要要求是其能够达到特定的滞止压力值和催化冷壁滞止点热通量。这两个变量使用水冷皮托管探头和稳态热通量探头测量。该文件包含这些探头的描述和有关其使用的细节，以及实验不确定度的分析。结果表明，该设备达到并超过了其基本要求。实验结果也进行了比较，由准一维的等离子体流在化学平衡的喷嘴代码预测的值。结果表明，实验值与预测值吻合较好。在不同位置的等离子体射流的测量结果也报告。热流密度和动压随距火炬轴向距离的减小基本呈线性关系。一维模型被证明是无法预测的质量流率的影响，由于强大的二维射流的影响。鉴于泵送能力的超音速操作的前景进行了检查。该设施的简要说明也是报告的一部分。
The present paper deals with the experimental determination of the operating envelope of the Plasmatron facility, designed and built at the von K&m&n Institute for Fluid Dynamics as the test bench of the European Space Agency to perform testing of TPS materials before their use in flight. As such the prime requisite of the facility is its capacity to reach specified values of stagnation pressure and catalytic cold wall stagnation point heat flux. These two variables are measured using a water-cooled Pitot probe and a steady-state heat flux probe. The paper contains the description of these probes and details about their use, as well as an analysis of experimental uncertainty. The results of the envelope exploration are presented and it is shown that the facility reaches and outdoes its basic requirements. The experimental results are also compared to the values predicted by a quasi-one-dimensional nozzle code of a plasma flow in chemical equilibrium. It is shown that the experimental values agree well with the predicted values. Results of measurements at various positions of the plasma jet are also reported. The decrease of heat flux and dynamic pressure with axial distance from the torch is essentially linear. The onedimensional model was shown to fail to predict the effect of mass flow rate, due to strong twodimensional effects in the jet. Perspectives of supersonic operation are examined in view of the pumping capacity. A brief description of the facility is also part of the report.