Research on Distribution Characteristics of Time-averaged Flow Field Downstream of Spacer Grid under Pulsating Flow

Li Xing; Wang Qianglong; Tan Sichao; Qiu Jinrong; You Ximing

doi:10.13832/j.jnpe.2022.03.0046

Volume 43 Issue 3

Jun. 2022

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Article Navigation > Nuclear Power Engineering > 2022 > 43(3): 46-52

Li Xing, Wang Qianglong, Tan Sichao, Qiu Jinrong, You Ximing. Research on Distribution Characteristics of Time-averaged Flow Field Downstream of Spacer Grid under Pulsating Flow[J]. Nuclear Power Engineering, 2022, 43(3): 46-52. doi: 10.13832/j.jnpe.2022.03.0046

Citation:

Li Xing, Wang Qianglong, Tan Sichao, Qiu Jinrong, You Ximing. Research on Distribution Characteristics of Time-averaged Flow Field Downstream of Spacer Grid under Pulsating Flow[J]. Nuclear Power Engineering, 2022, 43(3): 46-52. doi: 10.13832/j.jnpe.2022.03.0046

Citation:

Li Xing, Wang Qianglong, Tan Sichao, Qiu Jinrong, You Ximing. Research on Distribution Characteristics of Time-averaged Flow Field Downstream of Spacer Grid under Pulsating Flow[J]. Nuclear Power Engineering, 2022, 43(3): 46-52. doi: 10.13832/j.jnpe.2022.03.0046

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Research on Distribution Characteristics of Time-averaged Flow Field Downstream of Spacer Grid under Pulsating Flow

doi: 10.13832/j.jnpe.2022.03.0046

Li Xing^1
,,
Wang Qianglong^{1, 2},
Tan Sichao^{3
,
,},
Qiu Jinrong¹,
You Ximing¹

1.
Wuhan Second Ship Design and Research Institute, Wuhan, 430205, China
2.
Xi’an Jiaotong University, Xi’an, 710049, China
3.
Harbin Engineering University, Harbin, 150001, China

Received Date: 2021-05-06
Accepted Date: 2021-12-15
Rev Recd Date: 2021-06-08
Publish Date: 2022-06-07

Abstract

Abstract

Studying the evolution characteristics of the instantaneous flow field downstream of the spacer grid in the rod bundle channel under flow fluctuation is of great significance to reveal the flow and heat transfer mechanism in the fuel assembly under ocean conditions. In this paper, the structure of the spatio-temporal evolution flow field downstream of the spacer grid in the rod bundle channel under pulsating flow is obtained by using the particle image velocimetry (PIV) technique, and the effects of pulsating parameters (pulsating period and pulsating amplitude) on the velocity distribution and turbulence characteristics downstream of the spacer grid are analyzed. The results show that there is little difference between the time-averaged velocity downstream of the spacer grid under pulsating flow and that under steady flow, and it basically does not change with the variation of pulsating amplitude and pulsating period; The root mean square of transverse velocity and axial velocity downstream of the spacer grid under pulsating flow are significantly different from that under steady flow, and show different trends with the change of pulsating parameters. The results of this paper help to reveal the transient characteristics of fuel assemblies under unsteady conditions and lay a foundation for the design and optimization of fuel assemblies.
- PIV,
- Spacer grid,
- Pulsating flow,
- Velocity distribution,
- Turbulence characteristics

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References(17)

References

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