低温风洞多普勒全球测速技术的发展

20th International Congress on Instrumentation in Aerospace Simulation Facilities, 2003. ICIASF '03. Pub Date : 2003-08-25 DOI:10.1109/ICIASF.2003.1274846

C. Willert, G. Stockhausen, J. Klinner, M. Beversdorff, J. Quest, U. Jansen, M. Raffel

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引用次数: 7

摘要

专门设计的多普勒全球测速系统(DGV，平面多普勒测速)在高速低温设备中进行了测试，测试速度为0.3 ~ 0.8马赫，压力为1.2 ~ 2.5 bar。必要的播种是通过将气态氮和水蒸气的混合物注入干燥和寒冷的隧道流中，然后立即形成大量的小冰晶来实现的。由于与其他设施相比，DGV的操作条件和进入条件都有很大的限制，因此DGV被认为是目前流场非侵入式测量的最佳选择。并将DGV与更广泛的粒子图像测速技术(PIV)进行了比较。

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On the development of Doppler global velocimetry for cryogenic wind tunnels

A specially designed Doppler global velocimetry system (DGV, planar Doppler velocimetry) was tested in a high-speed cryogenic facility at Mach 0.3 to Mach 0.8 and pressures between 1.2 and 2.5 bar. The necessary seeding was achieved by injecting a mixture of gaseous nitrogen and water vapor into the dry and cold tunnel flow which then immediately formed a large amount of small ice crystals. As operational and access conditions are quite restrictive with respect to other facilities, DGV is currently considered the best choice for the non-intrusive measurement of flow fields. A comparison of DGV to the more wide-spread particle image velocimetry technique (PIV) is also given.

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20th International Congress on Instrumentation in Aerospace Simulation Facilities, 2003. ICIASF '03.

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