Sensitivity Analysis and Parametric Optimization of Distributors with Vapor-Liquid Two-Phase Flow

ZHI Changshuang; LI Chuangye; LI Jinbo; ZHAO Fufeng; YANG Peng; LIU Yingwen

doi:10.7652/xjtuxb202406009

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Sensitivity Analysis and Parametric Optimization of Distributors with Vapor-Liquid Two-Phase Flow

更新时间：2025-07-28

- Sensitivity Analysis and Parametric Optimization of Distributors with Vapor-Liquid Two-Phase Flow
- Vol. 58, Issue 6, Pages: 90-102(2024)
- 作者机构：
  
  1. 西安交通大学能源与动力工程学院,西安,710049
  2. 广东美的制冷设备有限公司,广东,佛山,528311
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202406009
  CLC： O359
- Online First：10 June 2024，
  
  Published：2024
- 稿件说明：
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ZHI Changshuang, LI Chuangye, LI Jinbo, et al. Sensitivity Analysis and Parametric Optimization of Distributors with Vapor-Liquid Two-Phase Flow[J]. 2024, 58(6): 90-102.
DOI：

ZHI Changshuang, LI Chuangye, LI Jinbo, et al. Sensitivity Analysis and Parametric Optimization of Distributors with Vapor-Liquid Two-Phase Flow[J]. 2024, 58(6): 90-102. DOI： 10.7652/xjtuxb202406009.

摘要

针对制冷系统气液两相流分配不均引起的多流路蒸发器能效低下

以及分配器结构设计不合理问题

基于六面体网格和Euler-Euler模型

构建了分配器中制冷剂气液两相流动模型

详细分析了制冷剂在分配器中的流动特性

研究了不同工况下腔体高度、腔体直径以及支管插入深度等参数对分配不均匀度的影响规律

并结合田口法进行敏感性分析及参数优化

得到了各参数的影响权重及最优参数组合。数值结果表明:随着腔体高度与直径的增大

气液两相流混合效果得到改善

分配不均匀度逐渐下降; 随着插入深度的增大

分配器不均匀度先降低后增大

插入深度最优值为5 mm; 随着质量流量的增大

腔体高度与插入深度的贡献逐渐增大

而腔体直径的贡献逐渐减小

表明分配均匀性对腔体直径的依赖程度降低; 相对于基准案例

所得最优组合的不均匀度降低了6.6%～19.3%。该研究可为抑制气液两相流相分离和分配器结构设计提供理论基础及数据支撑。

Abstract

To address the issues of low energy efficiency of multi-flow evaporator caused by non-uniform distribution of vapor-liquid two-phase flow in refrigeration system

and unreasonable design of distributor structure

the vapor-liquid two-phase flow model of refrigerant in distributor is established based on hexahedral grid and Euler-Euler model. The flow characteristics of refrigerant in distributor is analyzed in detail

and the effects of parameters such as cavity height

cavity diameter and insertion depth of branch on the non-uniformity of distribution under different conditions are explored. Furthermore

sensitivity analysis and parametric optimization are conducted using Taguchi method

and the contribution ratios and optimal parameter combination are obtained. The simulation results indicate that as the height and diameter of the cavity increase

the mixing effect of vapor and liquid is improved

and the non-uniformity gradually decreases. As the insertion depth increases

the non-uniformity first decreases and then increases

with an optimal insertion depth of 5 mm. With the mass flow rate increases

the contribution ratios of cavity height and insertion depth gradually increase

while the contribution ratio of cavity diameter gradually decreases

indicating that the dependence of distribution uniformity on cavity diameter decreases. Compared with the base case

the non-uniformity of the optimal parameter combination decreases by 6.6% to 19.3%. This research provides a theoretical foundation and data support for inhibiting the phase separation of vapor-liquid two-phase flow and design of distributor structure.

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references

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