Study on Slug Characteristics of Air-water Two-phase Flow in Horizontal Narrow Rectangular Channel

Liu Antai; Cheng Linhai; Gu Haifeng; Yan Changqi; Meng Zhaoming; Gong Suijun

doi:10.13832/j.jnpe.2022.06.0024

Volume 43 Issue 6

Dec. 2022

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Liu Antai, Cheng Linhai, Gu Haifeng, Yan Changqi, Meng Zhaoming, Gong Suijun. Study on Slug Characteristics of Air-water Two-phase Flow in Horizontal Narrow Rectangular Channel[J]. Nuclear Power Engineering, 2022, 43(6): 24-29. doi: 10.13832/j.jnpe.2022.06.0024

Citation:

Liu Antai, Cheng Linhai, Gu Haifeng, Yan Changqi, Meng Zhaoming, Gong Suijun. Study on Slug Characteristics of Air-water Two-phase Flow in Horizontal Narrow Rectangular Channel[J]. Nuclear Power Engineering, 2022, 43(6): 24-29. doi: 10.13832/j.jnpe.2022.06.0024

Citation:

Liu Antai, Cheng Linhai, Gu Haifeng, Yan Changqi, Meng Zhaoming, Gong Suijun. Study on Slug Characteristics of Air-water Two-phase Flow in Horizontal Narrow Rectangular Channel[J]. Nuclear Power Engineering, 2022, 43(6): 24-29. doi: 10.13832/j.jnpe.2022.06.0024

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Study on Slug Characteristics of Air-water Two-phase Flow in Horizontal Narrow Rectangular Channel

doi: 10.13832/j.jnpe.2022.06.0024

1.
Heilongjiang Provincial Key Laboratory of Nuclear Power System & Equipment, Harbin Engineering University, Harbin, 150001, China
2.
Nuclear Power Institute of China, Chengdu, 610005, China

Received Date: 2021-12-17
Rev Recd Date: 2022-07-12
Publish Date: 2022-12-14

Abstract

Abstract

As the key parameters of slug flow, slug velocity and liquid film thickness are of great significance in heat transfer analysis and mechanical analysis. In this paper, the characteristics of slug in a horizontal narrow rectangular channel with 1.9 mm×68 mm are studied by using high-speed camera and PCB liquid film sensor. For liquid Reynolds number ${{Re}}_{\text{l}}\text{ < 2500}$) , the rectangular channel is a laminar area; For Re_l≥2500, the rectangular channel is a turbulent area. Based on the gas-liquid two-phase mixing velocity, the predictive relation of slug velocity is fitted respectively. The results show that the laminar area distribution coefficient (C₀) can be calculated by Ishii equation and the drift velocity is 0; the turbulent area C₀ is 1.0. For slug Reynolds number Re_b<3100, the liquid film thickness (δ_b) at the bottom of slug increases with the increase of capillary number; For Re_b≥3100, δ_b shows volatility. Existing δ_b predictive relation is not applicable to narrow rectangular channels. Considering the influence of channel aspect ratio, a new δ_b predictive relation is proposed to verify 210 data in the literature, and the prediction errors are all within ±20%.
- Horizontal narrow rectangular channel,
- Two-phase flow,
- Slug velocity,
- Slug bottom liquid film thickness

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References(18)

References

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