A Prediction Model for Liquid Film Thickness and Heat Transfer Coefficient of Annular Flow in a Narrow Channel with Uniform Heating

Wu Lianwei; Meng Qingzheng; Chen Chong; Wu Wei; Liu Dongmin

doi:10.13832/j.jnpe.2018.01.0051

Volume 39 Issue 1

Feb. 2025

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Wu Lianwei, Meng Qingzheng, Chen Chong, Wu Wei, Liu Dongmin. A Prediction Model for Liquid Film Thickness and Heat Transfer Coefficient of Annular Flow in a Narrow Channel with Uniform Heating[J]. Nuclear Power Engineering, 2018, 39(1): 51-55. doi: 10.13832/j.jnpe.2018.01.0051

Citation:

Wu Lianwei, Meng Qingzheng, Chen Chong, Wu Wei, Liu Dongmin. A Prediction Model for Liquid Film Thickness and Heat Transfer Coefficient of Annular Flow in a Narrow Channel with Uniform Heating[J]. Nuclear Power Engineering, 2018, 39(1): 51-55. doi: 10.13832/j.jnpe.2018.01.0051

Citation:

Wu Lianwei, Meng Qingzheng, Chen Chong, Wu Wei, Liu Dongmin. A Prediction Model for Liquid Film Thickness and Heat Transfer Coefficient of Annular Flow in a Narrow Channel with Uniform Heating[J]. Nuclear Power Engineering, 2018, 39(1): 51-55. doi: 10.13832/j.jnpe.2018.01.0051

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A Prediction Model for Liquid Film Thickness and Heat Transfer Coefficient of Annular Flow in a Narrow Channel with Uniform Heating

doi: 10.13832/j.jnpe.2018.01.0051

1. Naval Representatives office in 701 Research Institute, Wuhan, 430064, China;
2. China Ship Development and Design Center, Wuhan, 430064, China

Received Date: 2017-02-12
Rev Recd Date: 2017-08-03

Available Online: 2025-02-09

Publish Date: 2025-02-09

Abstract

Abstract

In order to research the heat transfer characteristics of annular flow in the rectangular narrow channel, a mathematical model of annular flow in rectangular narrow channel is developed based on the mass, momentum and energy conversation equations of liquid film, as well the momentum conversation equation of vapor core. Through numerically solving the closure equations, the boiling heat transfer coefficients of annular flow in the rectangular narrow channel is obtained, and the effects of heat flux, mass flow rate and rectangular channel size on the liquid film thickness are analyzed. The results show that the present model can well predict the two-phase heat transfer coefficient, and the deviation is within ±30%. The heat flux and rectangular channel size have a big effect on the liquid film thickness.
- Rectangular narrow channel,
- Annular flow model,
- Boiling heat transfer coefficient,
- Liquid film thickness