气候变化领域集成服务门户(CCPortal): Numerical Investigation of Different Tip Clearances Effect on the Hydrodynamic Performance of Pumpjet Propulsor

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DOI	10.1142/S0219876218500378
	Numerical Investigation of Different Tip Clearances Effect on the Hydrodynamic Performance of Pumpjet Propulsor
	Qin, Denghui; Pan, Guang; Huang, Qiaogao; Zhang, Zhengdong; Ke, Jiujiu
发表日期	2018
ISSN	0219-8762
卷号	15 期号:5
英文摘要	Previous studies show that the tip clearance loss limits the improvement of turbomachinery performance, and it is roughly in close relation with the gap size. In this study, a pumpjet propulsor (PJP) with different sizes of tip clearances (delta = 0.2, 0.5, 1, 2, 3 mm) has been presented to investigate the influence of tip clearances on PJP. This analysis is based on computational fluid dynamic (CFD) method, and the SST k-omega turbulence model is applied. Calculations are carried out with a worldwide employed ducted propeller (the Ka4-70 propeller in 19A duct) to verify the numerical simulation. And the grid independence validation is discussed. The numerical simulation of PJP flow with different tip clearances is carried out. Results show that the open water efficiency decreases gradually with the increase of tip clearance. The efficiency decreasing is caused by the tip flow loss. The shape of tip vortex of PJP which consisted of tip-separation vortex and tip-leakage vortex is presented. Furthermore, the formation and spread process of tip vortex at different tip clearances are discussed. Then, the effect of different tip clearances on the pressure field of rotor blade is investigated. The main pressure area affected by different tip clearances is mainly concentrated in the area above 0.9 spanwise of the suction side of rotor blade. Beyond that, the effects of different tip clearances on the velocity field of PJP has been studied.
英文关键词	Pumpjet propulsor; tip clearance; the tip vortex; the hydrodynamic performance
WOS研究方向	Engineering ; Mathematics
WOS类目	Engineering, Multidisciplinary ; Mathematics, Interdisciplinary Applications
来源期刊	INTERNATIONAL JOURNAL OF COMPUTATIONAL METHODS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/158516
作者单位	Pan, G (corresponding author), Northwestern Polytech Univ, Sch Marine Sci & Technol, Xian 710072, Shaanxi, Peoples R China.
推荐引用方式 GB/T 7714	Qin, Denghui,Pan, Guang,Huang, Qiaogao,et al. Numerical Investigation of Different Tip Clearances Effect on the Hydrodynamic Performance of Pumpjet Propulsor[J],2018,15(5).
APA	Qin, Denghui,Pan, Guang,Huang, Qiaogao,Zhang, Zhengdong,&Ke, Jiujiu.(2018).Numerical Investigation of Different Tip Clearances Effect on the Hydrodynamic Performance of Pumpjet Propulsor.INTERNATIONAL JOURNAL OF COMPUTATIONAL METHODS,15(5).
MLA	Qin, Denghui,et al."Numerical Investigation of Different Tip Clearances Effect on the Hydrodynamic Performance of Pumpjet Propulsor".INTERNATIONAL JOURNAL OF COMPUTATIONAL METHODS 15.5(2018).