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Influence of tip clearance of semi-open centrifugal pump on performance stability(PDF)

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]

Issue:
2014年04期
Page:
29-34
Research Field:
研究与设计
Publishing date:

Info

Title:
Influence of tip clearance of semi-open centrifugal pump on performance stability
Author(s):
WU Jie;  XU Nan;  YANG Da-yu;  LIU Jun-nian
Xi’an Aerospace Propulsion Institute, Xi’an 710100, China
Keywords:
-
PACS:
V434-34
DOI:
-
Abstract:
In order to improve the performance stability of liquid rocket engine turbopump, the flow characteristics of semi-open centrifugal pump tip clearance are studied by means of the boundary layer theory. The thickness of the boundary layer in tip clearance is calculated with the boundary layer momentum integral equation. The pump performance test and numerical simulation study are carried out with different tip clearances. The results show that, when the tip clearance is equal to the thickness of boundary layer, the tip clearance leakage vortex will no longer be enhanced and the pump performance is stable. The volumetric efficiency of the pump is low when the tip clearance is too large and the pump performance drops off precipitously. The theoretical method can be used as an important reference to determine the semi-open certrifugal pump tip clearance.

References:

[1]ZHU zu-chao, CHEN Ying. Experimental study on high- speed centrifugal pumps with different impellers[J]. Chinese Journal of Mechanical Engineering, 2002, 15(4): 372-375.
[2]张剑慈, 崔宝玲. 开式离心叶轮内部流道的数值模拟[J]. 机械工程学报，2006，42(4)：37-41
[3]ENGIN Tahsin, GUR Mesut, SCHOLZ Reinhard. Effects of tip clearance and impeller geometry on the performance of semi-open ceramic centrifugal fan impellers at elevated temperatures[J]. Experimental Thermal and Fluid Science, 2006, 30: 565-577.
[4]TAMM Alberto, STOFFEL Bernd. The influences of gap clearance and surface roughness on leakage loss and disc friction of centrifugal pumps[C]// Proceedings of ASME 2002 Fluids Engineering Division Summer Meeting. Montreal, Quebec, Canada: ASME, 2002: 14-18.
[5]毛佳妮, 曹紫胤. 抑制叶顶间隙泄漏的叶轮机械叶片的流场模拟[J]. 热能动力工程, 2009, 24(2): 154-262.
[6]朱祖超. 小流量切线泵设计与应用[J]. 水泵技术,1996(1):9-12.
[7]景思睿, 张鸣远. 流体力学[M]. 西安: 西安交通大学出版社, 2001.

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