Experimental and Numerical Investigations on the Operation of the Hypersonic Ludwieg Tube Braunschweig
Experimental and Numerical Investigations on the Operation of the Hypersonic Ludwieg Tube Braunschweig
复制标题
不伦瑞克高超声速路德维格管运行的实验和数值研究
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
R. Radespiel
中科院分区：
文献类型：
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作者：
M. Estorf;T. Wolf;R. Radespiel
2003年夏天，高超声速路德维格布伦斯韦格管(HLB)已经投入使用。该装置设计的机器数M=6，单位雷诺数的工作范围为3·101/m~20·101/m，试验段直径为500 mm，在近稳定流条件下运行时间为80ms。第一次测量测试段内的皮托管压力显示出良好的横向均匀度，但对存储管内总温度的测量显示，在管的加热段内伴随着对流的强烈层结。在这篇文章中，我们介绍了最近采取的减弱分层的措施。对试验段内的温度分布进行了测量，并在尖头5◦半角锥体上进行了初步过渡试验。进一步，我们比较了非定常数值模拟的第一次结果的非定常开始在HLB流和测量数据。
In summer 2003 the Hypersonic Ludwieg Tube Braunschweig (HLB) has been commissioned. It has been designed for Machnumber M = 6. The operative range of the unit Reynoldsnumber is between 3 · 10 1/m and 20 · 10 1/m. The test section has 500 mm diameter and the run time with near steady flow conditions is 80 ms. First measurements of the pitot pressure within the testsection have shown good transverse uniformity, but measurements of the total temperature within the storage tube revealed a strong stratification accompanied by convective flow within the heated section of the tube. In this paper we present recent measures to attenuate the stratification. Measurements of the temperature distribution within the testsection and preliminary transition tests on a sharp 5◦ half-angle cone have been performed. Further we compare first results of invisvid numerical simulations of the unsteady onset of flow in the HLB to measured data.