Experimental Study on Vortex Shedding in Water Medium of Closed Three-Way Side Branch Pipe

Liu Shuai; Jiang Xiaozhou; Feng Zhipeng; Huang Xuan; Zhang Rui; Zhang Yixiong

doi:10.13832/j.jnpe.2021.S2.0070

Volume 42 Issue S2

Dec. 2021

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Article Navigation > Nuclear Power Engineering > 2021 > 42(S2): 70-76

Liu Shuai, Jiang Xiaozhou, Feng Zhipeng, Huang Xuan, Zhang Rui, Zhang Yixiong. Experimental Study on Vortex Shedding in Water Medium of Closed Three-Way Side Branch Pipe[J]. Nuclear Power Engineering, 2021, 42(S2): 70-76. doi: 10.13832/j.jnpe.2021.S2.0070

Citation:

Liu Shuai, Jiang Xiaozhou, Feng Zhipeng, Huang Xuan, Zhang Rui, Zhang Yixiong. Experimental Study on Vortex Shedding in Water Medium of Closed Three-Way Side Branch Pipe[J]. Nuclear Power Engineering, 2021, 42(S2): 70-76. doi: 10.13832/j.jnpe.2021.S2.0070

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Experimental Study on Vortex Shedding in Water Medium of Closed Three-Way Side Branch Pipe

doi: 10.13832/j.jnpe.2021.S2.0070

Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu, 610213, China

Received Date: 2021-07-19
Accepted Date: 2021-12-06
Rev Recd Date: 2021-11-04
Publish Date: 2021-12-29

Abstract

Abstract

Through the study on the vortex shedding in the water medium of the closed three-way side branch pipe, and according to the vortex shedding mechanism of the three-way pipe, a test device for the closed three-way side branch pipe is established to verify the mechanism. The Particle Image Velocimetry (PIV) test method is used to obtain the cross-sectional streamlines and velocities at the three-way positions of the closed three-way side branch pipe under different flow conditions, and analyze the location and change characteristics of the vortex shedding of the three-way pipe. Tests have shown that due to the unique flow field structure of the three-way pipe, a pressure wave will be formed at the location of the three-way, and a vortex will be formed in the side branch pipe; a large velocity gradient occurs in the area where the fluid flows through the main pipe and the side branch pipe, resulting in the formation of a small vortex that is falling off at the front edge of the side branch pipe; due to the viscosity of the fluid, the fluid at the front edge of the side branch pipe will be driven by the fluid in the main flow area to flow downstream, creating a vacuum area at the front edge; the velocity fluctuation at the interface between the main pipe and the side branch pipe, the size of the vortex in the side branch pipe and the vortex shedding velocity at the front edge of the side branch pipe will increase with the increase of velocity.
- Three-way branch pipe,
- Vortex shedding,
- PIV test,
- Water medium

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References(7)

References

[1]	MORITA R, TAKAHASHI S, YOSHIKAWA K. Computational investigation of pressure fluctuations in BWR main steam line[C]//Proceeding of ASME 2009 Pressure Vessels and Piping Conference. Prague: ASME, 2009.
[2]	TAKAHASHI S, OHTSUKA M, OKUYAMA K, et al. Experimental study of acoustic and flow-induced vibrations in BWR main steam lines and steam dryers[C]//Proceeding of ASME 2008 Pressure Vessels and Piping Conference. Chicago: ASME, 2008.
[3]	UCHIYAMA Y, MORITA R. Flow-induced acoustic resonance in a closed side branch under a low-pressure wet steam flow[J]. Journal of Pressure Vessel Technology, 2017, 139(3): 031306. doi: 10.1115/1.4035271
[4]	LAWSON S J, BARAKOS G N. Review of numerical simulations for high-speed, turbulent cavity flows[J]. Progress in Aerospace Sciences, 2011, 47(3): 186-216. doi: 10.1016/j.paerosci.2010.11.002
[5]	ZHANG H. Experimental and numerical study on flow-induced acoustic resonance in square closed side branch[D]. Shanghai: Shanghai Jiao Tong University, 2013.
[6]	RAFFEL M, WILLERT C, WERELEY S, et al. Particle image velocimetry[M]. 2nd ed. Berlin: Springer, 2007.
[7]	WANG R Q. Study of flow field characteristics in rod bundles with laser diagnostic technique[D]. Harbin: Harbin Engineering University, 2016.