Performance analysis of brush seal pump-jet without tip clearance propulsor based on anisotropic porous medium model
TANG Wanghao1，2, WANG Haoran1，2, HUANG Fei1，2, HUANG Xiuchang1，2, HUA Hongxing1，2
1.Fundamental Science on Vibration, Shock and Noise Laboratory, Shanghai Jiao Tong University, Shanghai 200240, China;
2.State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai 200240, China
Abstract：The hydrodynamic performance and flow-induced vibration of a pump-jet are greatly influenced by the flow in tip clearance. Aiming at optimizing the design of brush seal and analyzing the performance of pump-jet without tip clearance, the anisotropic porous media model was employed to characterize the brush seal, the fluid-structure interaction model of the brush filament bundle and the computational fluid dynamics model of the pump-jet containing porous media were established. According to the results of coupled fluid-structure simulation experiment, the drag coefficient in the power source term of the porous media control equation was determined, then the orthogonal test was used to optimize the structural parameters of the brush seal, and then the hydrodynamic performance of pump-jet equipped optimized brush seal was calculated. Compared with the CFD model of ideal pump-jet without tip clearance and cavitation tunnel test results, incorporating anisotropic porous medium model improves the calculation accuracy of torque by 4%. The unsteady excitation of pump-jet was obtained through unsteady calculation. The results show that the thrust pulsation and torque pulsation of pump-jet with brush seal was reduced by an order of magnitude at the shaft frequency and the blade-passing frequency compared to pump-jet with tip clearance.
Key words: pump-jet without tip clearance; brush seal; anisotropic porous medium; hydrodynamic performance; unsteady excitation
汤王豪1，2，王浩然1，2，黄飞1，2，黄修长1，2，华宏星1，2. 基于各向异性多孔介质模型的刷式密封无间隙泵喷推进器性能分析[J]. 振动与冲击, 2022, 41(21): 28-34.
TANG Wanghao1，2, WANG Haoran1，2, HUANG Fei1，2, HUANG Xiuchang1，2, HUA Hongxing1，2. Performance analysis of brush seal pump-jet without tip clearance propulsor based on anisotropic porous medium model. JOURNAL OF VIBRATION AND SHOCK, 2022, 41(21): 28-34.
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