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Experimental investigation of velocity fluctuations in a radial diffuser pump 被引量:2
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作者 冯建军 罗兴锜 +1 位作者 benra friedrich-karl DOHMEN Hans-Josef 《Journal of Hydrodynamics》 SCIE EI CSCD 2015年第3期332-339,共8页
The strong interaction in a radial pump due to the relative movement between the impeller and the diffuser may excite not only strong pressure fluctuations but also velocity fluctuations. In this paper, the laser Dopp... The strong interaction in a radial pump due to the relative movement between the impeller and the diffuser may excite not only strong pressure fluctuations but also velocity fluctuations. In this paper, the laser Doppler velocimetry (LDV) technique is successfully applied to measure the periodic flow field in a radial diffuser pump with low-specific speed, in order to investigate the velocity fluctuations caused by the impeller-diffuser interactions both in the impeller and diffuser regions. The velocity fluctuations in the impeller region are quantitatively examined at different radial positions, and the flow structure at the radial gap between two flow components is analyzed at different relative positions. In addition, the downstream effect on the diffuser flow is quantitatively and qualitatively assessed and compared with the turbulence effect. 展开更多
关键词 laser Doppler velocimetry (LDV) radial pump impeller-diffuser interaction velocity fluctuations
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