Theoretical Research on DNB-type Critical Heat Flux in Uniform Heating Narrow Rectangular Tube

Zhao Dawei; Liu Wenxing; Xiong Wanyu; Yang Zumao; Huang Yanping

doi:10.13832/j.jnpe.2016.03.0021

Volume 37 Issue 3

Feb. 2025

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Zhao Dawei, Liu Wenxing, Xiong Wanyu, Yang Zumao, Huang Yanping. Theoretical Research on DNB-type Critical Heat Flux in Uniform Heating Narrow Rectangular Tube[J]. Nuclear Power Engineering, 2016, 37(3): 21-25. doi: 10.13832/j.jnpe.2016.03.0021

Citation:

Zhao Dawei, Liu Wenxing, Xiong Wanyu, Yang Zumao, Huang Yanping. Theoretical Research on DNB-type Critical Heat Flux in Uniform Heating Narrow Rectangular Tube[J]. Nuclear Power Engineering, 2016, 37(3): 21-25. doi: 10.13832/j.jnpe.2016.03.0021

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Theoretical Research on DNB-type Critical Heat Flux in Uniform Heating Narrow Rectangular Tube

doi: 10.13832/j.jnpe.2016.03.0021

CNNC Key Laboratory on Nuclear Reactor Thermal Hydraulics Technology, Nuclear Power Institute of China, Chengdu, 610213, China

Received Date: 2015-04-09
Rev Recd Date: 2015-10-20

Available Online: 2025-02-15

Abstract

Abstract

Based on liquid sublayer dryout mechanism, a critical heat flux（CHF） model has been developed for the prediction of DNB-type CHF. In the model, the forces exerted on the vapor blanket are analyzed to calculate the boiling crisis parameters including vapor blanket velocity, sublayer thickness with modified lift force coefficient. The predictions of present CHF model are verified by CHF experimental results, which are obtained in two narrow rectangular test sections with different heating length. The deviations between the CHF predictions and CHF experiment results are within ±15% error band, which show more reasonable accuracy than using Bowring correlation and Bettis correlation.
- CHF,
- Liquid sublayer dryout model,
- DNB,
- Narrow rectangular tube