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Effect of an inducer on cavitation flow field of a high-speed liquid-oxygen-pump |
DOU Wei1, JIANG Wenshan1, LI Chaoqun2, GAO Yongxin2, YAO Cheng2 |
1.Beijing Aerospace Propulsion Institute, Beijing 100076, China;
2.College of Civil Engineering, Hefei university of Technology, Hefei 230009, China |
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Abstract High anti-cavitation inducer improves the cavitation characteristics of the liquid-oxygen-pump and enhances the reliability of heavy-lift rockets. Based on the computational fluid dynamics method, a geometry of the high-speed liquid-oxygen-pump is established to simulate its flow field. The accuracy of numerical model is validated with three test conditions. Effects of inducer-blade number on the performance and cavitation characteristics of the liquid-oxygen-pump are investigated in the present work. It is found that implementing inducer compensates for the cavitation in the centrifugal wheel by reducing the cavitation area and improves the pumping head of the liquid-oxygen-pump. When the inflow mass flow rate and the outflow pressure keeps constant, increasing the inducer-blade number enhances the liquid-oxygen-pump efficiency, but reduces the pumping head. Meanwhile, the ability of compensating cavitation weakens where the cavitation area increases in the centrifugal wheel. Considering the performance and cavitation characteristics of the pump, the inducer with three-blades satisfies the high reliability requirement for the heavy-lift rockets.
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Received: 11 May 2023
Published: 28 April 2024
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