Measurement of characteristic feature of cavitation flows of He Ⅰ and He Ⅱ

机译：HeⅠ和HeⅡ空化流动特征的测量。

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In the present experimental study cavitation phenomena in both He Ⅰ and He Ⅱ flows were investigated through the pressure and temperature measurements and the application of optical visualization. The cavitation flow is generated in the downstream region of a Venturi channel driven by contracting the metal bellows. The cavitating flows can be observed through the optical windows of the cryostat Tests were carried out for both He Ⅱ and He Ⅰ. The pressure loss and the temperature drop caused by cavitation are measured in a wide range of the flow velocity. The spatial distribution of the cavitation bubble velocity is also measured by the application of PIV (Particle Image Velocimetry) technique.

机译：在本实验研究中，通过压力和温度测量以及光学可视化的应用研究了HeⅠ和HeⅡ流中的空化现象。在文丘里管通道的下游区域通过压缩金属波纹管而产生空化流。可通过低温恒温器的光学窗口观察到空化流。对HeⅡ和HeⅠ均进行了测试。在很宽的流速范围内测量由气蚀引起的压力损失和温度下降。空化气泡速度的空间分布也通过应用PIV（颗粒图像测速）技术进行测量。

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《International Cryogenic Engineering Conference(ICEC 20)》|2004年|939-942|共4页
会议地点 Beijing(CN)
作者
Harada K.; Tsukahara R.; Murakami M.;
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Institute of Engineering Mechanics and Systems University of Tsukuba Tsukuba 305-8573 Japan;

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Measurement of characteristic feature of cavitation flows of He Ⅰ and He Ⅱ

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