Experimental research on dryout point of flow boiling in narrow annular channels

Ge-Ping WU; Sui-Zheng QIU; Guang-Hui SU; Dou-Nan JIA; Dong-Hua LU

doi:10.1016/S1001-8042(06)60047-X

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Experimental research on dryout point of flow boiling in narrow annular channels

MISCELLANEOUS | Updated：2021-01-29

- Experimental research on dryout point of flow boiling in narrow annular channels
- Nuclear Science and Techniques Vol. 17, Issue 4, (2006)
- Affiliations：
  
  1.State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China
  2.Reactor Engineering Research Division, Nuclear Power Institute of China, Chengdu 610041, China
- Author bio：
  
  E-mail: gpwu@mailst.xjtu.edu.cn
- Funds：
- DOI：10.1016/S1001-8042(06)60047-X
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Ge-Ping WU, Sui-Zheng QIU, Guang-Hui SU, et al. Experimental research on dryout point of flow boiling in narrow annular channels. [J]. Nuclear Science and Techniques 17(4):252-256(2006)
DOI：

Ge-Ping WU, Sui-Zheng QIU, Guang-Hui SU, et al. Experimental research on dryout point of flow boiling in narrow annular channels. [J]. Nuclear Science and Techniques 17(4):252-256(2006) DOI： 10.1016/S1001-8042(06)60047-X.

摘要

Abstract

An experimental research on the dryout point of flow boiling in narrow annular channels under low mass flux with 1.55mm and 1.05mm annular gap, respectively, is conducted. Distilled water is used as working fluid and the range of pressure is limited within 2.0~4.0MPa and that of mass flux is 26.0~69.0kg·m,-2,·s,-1,. The relation of critical heat flux (CHF) and critical qualities with mass flux and pressure are revealed. It is found that the critical qualities decrease with the increasing mass flux and increase with the increasing inlet qualities in externally heated annuli. Under the same conditions, critical qualities in the outer tube are always larger than those in the inner tube. The appearance of dryout point in bilaterally heated narrow annuli can be judged according to the ratio of ,q,o,/,q,i,.

关键词

Keywords

Narrow annular channelFlow boilingDryout point

references

Okawa T, Kotani A, Kataoka I. Prediction of dryout heat flux in vertical round tubes with uniform and non-uniform heating, The 10th International Topic Meeting on Nuclear Reactor Thermal Hydraulics, October 2003, Seoul, Korea.

Wang B X, Zhang J T, Peng X F, International Journal of Heat and Mass Transfer, 2000, 43: 1897-1903.

Knudsen J G, Katz D L. Fluid dynamics and heat transfer. New York: McGraw-Hill, 1958:186-195.

Collier J G, Thome J R. Convective boiling and condensation. Oxford: Oxford University Press, 1994: 329-367.

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State Key Laboratory of Multiphase Flow on Power Engineering, Department of Nuclear & Thermal Power Engineering Xi'an Jiaotong University

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