Predicting the preferential sites to liquid droplet erosion of the bellows assemblies by CFD

IMR OpenIR

	Predicting the preferential sites to liquid droplet erosion of the bellows assemblies by CFD
	H. X. Hu; Y. G. Zheng; C. B. Liu
	2011
发表期刊	Nuclear Engineering and Design
ISSN	0029-5493
卷号	241 期号:6 页码:2295-2306
摘要	Bellows assemblies are placed within extraction steam lines to absorb the differential displacement (driven primarily by thermal growth) between the turbine lower casing and the condenser shell in nuclear power plants. The thin wall thickness and service environmental conditions of the bellows predetermine their vulnerable endurance to the liquid droplet erosion (LDE). A three-dimensional computational fluid dynamics (CFD) bellows model proposed in this paper consists of a hydraulic model and a LDE model aiming to investigate the LDE on the external surface of the bellows assemblies. The result shows that the most prone site to LDE locates at the upwind side of the first bellows convolution (USFBC). The droplet diameter has significant effect on the LDE extent, rather than the LDE distribution. Moreover, the addition of the weld seam before the bellows can mitigate the LDE of the bellows downstream. In addition, the protecting cover (PC) effectively prevents the bellows from the LDE, but causes the droplet accumulation on the convolution, which possible leads to corrosive damage. The PC structure was designed optimization according to the requirements of the displacement compensation, the manufacture cost and the LDE resistance. (C) 2011 Elsevier B.V. All rights reserved.
部门归属	[hu, h. x.; zheng, y. g.; liu, c. b.] chinese acad sci, state key lab corros & protect, inst met res, shenyang 110016, peoples r china.;zheng, yg (reprint author), chinese acad sci, state key lab corros & protect, inst met res, 62 wencui rd, shenyang 110016, peoples r china;ygzheng@imr.ac.cn
关键词	Nuclear-power-plant U-shaped Bellows Wear Sites Feedwater Heater Failure Analysis Disturbed Flow Ductile Metals Corrosion Impact Hydrodynamics
URL	查看原文
WOS记录号	WOS:000292418800042
引用统计	被引频次：6[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/30392
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	H. X. Hu,Y. G. Zheng,C. B. Liu. Predicting the preferential sites to liquid droplet erosion of the bellows assemblies by CFD[J]. Nuclear Engineering and Design,2011,241(6):2295-2306.
APA	H. X. Hu,Y. G. Zheng,&C. B. Liu.(2011).Predicting the preferential sites to liquid droplet erosion of the bellows assemblies by CFD.Nuclear Engineering and Design,241(6),2295-2306.
MLA	H. X. Hu,et al."Predicting the preferential sites to liquid droplet erosion of the bellows assemblies by CFD".Nuclear Engineering and Design 241.6(2011):2295-2306.