垂直上升光管中气液两相摩擦因子分析

唐国力, 吴玉新, 顾君苹, 刘青, 吕俊复

清华大学学报（自然科学版） ›› 2020, Vol. 60 ›› Issue (6) : 500-506.

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清华大学学报（自然科学版） ›› 2020, Vol. 60 ›› Issue (6) : 500-506. DOI: 10.16511/j.cnki.qhdxxb.2020.25.017
专题：能源领域中的多相流动基础及应用

垂直上升光管中气液两相摩擦因子分析

  • 唐国力1,2, 吴玉新1, 顾君苹1, 刘青1, 吕俊复1
作者信息 +

Comparison of two-phase empirical multiplier correlations for high pressure steam-water mixtures flowing upward in a vertical smooth tube

  • TANG Guoli1,2, WU Yuxin1, GU Junping1, LIU Qing1, L�Junfu1
Author information +
文章历史 +

摘要

管内气液两相流动压降是水动力计算中的重要参数，选取不同摩擦因子会影响到计算结果的精度。为分析不同摩擦因子的适用性，该文讨论了5种常见的全液相两相摩擦因子计算方法，对关键参数选取进行了敏感性分析，并将5种方法的计算结果与文献中高压下汽水工质在垂直光管内的实验结果进行了比较。结果表明：管径对5种计算方法的影响有限；壁面粗糙度对Chisholm方法和Chisholm B系数方法的计算结果影响较大，这2种方法的结果均随着壁面粗糙度的增加而减小；工质压力的增加会导致压降的计算结果减小；质量流速对Chisholm方法和83国标方法的计算结果影响较大，并且质量流速增加，计算压降减小。计算结果与实验结果的比较表明：在中、低干度区域，Chisholm方法、Friedel方法和改进Friedel方法的计算结果与实验数据比较接近；在高干度区域，83国标方法的计算结果与实验数据更为接近。

Abstract

Good pressure drop predictions are critical for hydrodynamic simulations of gas-liquid two-phase flows. Good simulations must use the correct multiplier empirical correlations for the various key parameters for the hydrodynamic calculations. This study compared five two-phase empirical multiplier correlations. A parametric sensitivity analysis showed that the tube inside diameter had little effect on all five correlations. The wall roughness significantly influenced the Chisholm method and the Chisholm B coefficient method. The pressure and mass flux significantly influenced all five correlations, with the calculated values decreasing with increasing pressure and mass flux. The predictions were also compared with experimental data for high pressure steam-water mixtures flowing upward in a vertical smooth tube. For low steam qualities, the Chisholm method, Friedel method and improved Friedel method give the best predictions. For high steam quality flows, the 83 national standard method gives the best predictions. The differences between the experimental data and predictions decrease with increasing pressure.

关键词

两相摩擦因子 / 摩擦压降 / 经验关系式 / 汽水混合物 / 两相流动

Key words

two-phase multiplier / frictional pressure drop / empirical correlation / steam-water mixture / two-phase flow

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唐国力, 吴玉新, 顾君苹, 刘青, 吕俊复. 垂直上升光管中气液两相摩擦因子分析[J]. 清华大学学报（自然科学版）. 2020, 60(6): 500-506 https://doi.org/10.16511/j.cnki.qhdxxb.2020.25.017
TANG Guoli, WU Yuxin, GU Junping, LIU Qing, L�Junfu. Comparison of two-phase empirical multiplier correlations for high pressure steam-water mixtures flowing upward in a vertical smooth tube[J]. Journal of Tsinghua University(Science and Technology). 2020, 60(6): 500-506 https://doi.org/10.16511/j.cnki.qhdxxb.2020.25.017

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基金

国家重点研发计划项目（2016YFB0600201）

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