PIV measurement and CFD analysis of the turbulent flow in a 3 × 3 rod bundle

2020 ◽  
Vol 140 ◽  
pp. 107135 ◽  
Author(s):  
Han Wang ◽  
Daogang Lu ◽  
Yuzhong Liu
Keyword(s):  
Turbulent Flow ◽  
Cfd Analysis ◽  
Rod Bundle ◽  
Piv Measurement

PIV measurement of turbulent flow downstream of mixing vane spacer grid in 5×5 rod bundle

2019 ◽  
Vol 132 ◽  
pp. 277-287 ◽  
Author(s):  
Wenhai Qu ◽  
Jinbiao Xiong ◽  
Shilong Chen ◽  
Zhifang Qiu ◽  
Jian Deng ◽  
...  
Keyword(s):  
Turbulent Flow ◽  
Spacer Grid ◽  
Rod Bundle ◽  
Piv Measurement

On the Development of Turbulent Flow in Wall Subchannels of a Rod Bundle

1987 ◽  
Vol 77 (3) ◽  
pp. 331-342 ◽  
Author(s):  
Klaus Rehme
Keyword(s):  
Turbulent Flow ◽  
Rod Bundle

CFD analysis of flow field in a triangular rod bundle

2010 ◽  
Vol 240 (2) ◽  
pp. 352-363 ◽  
Author(s):  
S. Tóth ◽  
A. Aszódi
Keyword(s):  
Flow Field ◽  
Cfd Analysis ◽  
Rod Bundle

Turbulent Flow Through Spacer Grids in Rod Bundles

1998 ◽  
Vol 120 (4) ◽  
pp. 786-791 ◽  
Author(s):  
Sun Kyu Yang ◽  
Moon Ki Chung
Keyword(s):  
Turbulent Flow ◽  
Laser Doppler Velocimetry ◽  
Hydraulic Characteristics ◽  
Rod Bundles ◽  
Spacer Grid ◽  
Spacer Grids ◽  
Rod Bundle ◽  
Turbulence Decay ◽  
Skewness Factor ◽  
Flow Through

The effects of the spacer grids with mixing vanes in rod bundles on the turbulent structure were investigated experimentally. The detailed hydraulic characteristics in subchannels of a 5 × 5 rod bundle with mixing spacer grids were measured upstream and downstream of the spacer grid by using a one component LDV (Laser Doppler Velocimetry). Axial velocity and turbulent intensity, skewness factor, and flatness factor were measured. The turbulence decay behind spacer grids was obtained from measured data. The trend of turbulence decay behaves in a similar way as turbulent flow through mesh grids or screens. Pressure drop measurements were also performed to evaluate the loss coefficient for the spacer grid and the friction factor for a rod bundle.

Numerical Prediction of Void Distribution in Two-Phase Turbulent Flow in a Sub-Channel

2009 ◽  
Author(s):  
Tsutomu Ikeno ◽  
Tatsuya Sasakawa ◽  
Isao Kataoka
Keyword(s):  
Turbulent Flow ◽  
Transport Equation ◽  
Nucleate Boiling ◽  
Pressurized Water Reactor ◽  
Two Phase ◽  
Simulation Code ◽  
Pressurized Water ◽  
Void Fractions ◽  
Rod Bundle ◽  
Void Distribution

Numerical simulation code for predicting void distribution in two-phase turbulent flow in a sub-channel was developed. The purpose is to obtain a profile of void distribution in the sub-channel. The result will be used for predicting a heat flux at departure from nucleate boiling (DNB) in a rod bundle for the pressurized water reactor (PWR). The fundamental equations were represented by a generalized transport equation, and the transport equation was transformed onto the generalized coordinate system fitted to the rod surface and the symmetric lines in the sub-channel. Using the finite-volume method the transport equation was discretized for the SIMPLE algorism. The flow field and void fraction at the steady state were calculated for different average void fractions. The computational result for atmospheric pressure condition was successfully compared with experimental data. Sensitivity analysis for the PWR condition was performed, and the result showed that the secondary flow slightly contributed to homogenizing the void distribution.

Phenomenological investigations on the turbulent flow structures in a rod bundle array with mixing devices

2008 ◽  
Vol 238 (3) ◽  
pp. 600-609 ◽  
Author(s):  
Seok Kyu Chang ◽  
Sang Ki Moon ◽  
Won Pil Baek ◽  
Young Don Choi
Keyword(s):  
Turbulent Flow ◽  
Flow Structures ◽  
Rod Bundle

Turbulent flow in a model nuclear fuel rod bundle containing partial flow blockages

1979 ◽  
Vol 52 (1) ◽  
pp. 15-33 ◽  
Author(s):  
J.M. Creer ◽  
J.M. Bates ◽  
A.M. Sutey ◽  
D.S. Rowe
Keyword(s):  
Turbulent Flow ◽  
Nuclear Fuel ◽  
Fuel Rod ◽  
Rod Bundle
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