矩形小流道受限汽泡流及环状流区域沸腾传热模型研究

于忠斌; 李毅; 田野

doi:10.13832/j.jnpe.2021.04.0051

矩形小流道受限汽泡流及环状流区域沸腾传热模型研究

doi: 10.13832/j.jnpe.2021.04.0051

1.
海军装备部，成都，610213
2.
中国核动力研究设计院核反应堆系统设计技术重点实验室，成都，610213

详细信息

作者简介:
于忠斌（1975—），男，高级工程师，现从事核动力装置研究，E-mail: hdlgcyzb@163.com

中图分类号: TL331
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- 被引次数: 0
出版历程
- 收稿日期: 2020-09-21
- 修回日期: 2020-10-16
- 刊出日期: 2021-08-15

Study of Boiling Heat Transfer Model of Confined Bubble Flow and Annular Flow in a Heating Rectangular Mini-Channel

1.
Naval Armaments Division, Chengdu, 610213, China
2.
Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu, 610213, China

摘要

摘要: 为探析矩形小流道受限汽泡流及环状流区域沸腾传热机理，本文基于理论推导，从受限汽泡典型特征出发，探明了受限汽泡流几何结构；基于时间加权平均方法，确定了受限汽泡区及液塞区在受限汽泡流所占权重；基于一维导热等理论和积分方法，建立了液膜蒸发换热系数计算方法，并将其应用于环状流区域。综合上述方法，提出了一种新的受限汽泡流及环状流区域沸腾传热模型——双区域模型，该模型适用范围为：雷诺数（Re）为2300~5373，普朗特数（Pr）为2.75~19.8，毛细数（Ca）为0.000835~0.002767。
- 受限汽泡流 /
- 环状流 /
- 沸腾传热 /
- 矩形小流道
Abstract: the Based on the typical characteristics of the restricted bubble, the geometric structure of confined bubble flow is investigated. Based on the time weighted average method, the weights of the confined bubble and the liquid plug area in the confined bubble flow are determined. Based on one-dimensional heat conduction theory and integral method, a method for calculating the evaporation heat transfer coefficient of liquid film was established and applied to the annular flow area.The model works with Re range of 2300 to 5373, Pr range of 2.75 to 19.8, and Ca range of 0.000835 to 0.002767.
- Confined bubble flow /
- Annular flow /
- Boiling heat transfer /
- Rectangular mini-channel

HTML全文

图 1 受限汽泡流图像

Figure 1. Confined Bubble Flow

下载: 全尺寸图片幻灯片

图 2 受限汽泡典型特征

L_p—受限汽泡组长度；L_l—液塞长度；L_film—单个受限汽泡长度　　　　　　　　　　　

Figure 2. Characteristics of Confined Bubble Flow

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图 3 t₀与t₀+τ时刻固定观测点汽泡循环比较

Figure 3. Comparison of Bubbles at Different Times

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图 4 受限汽泡区域液膜蒸发示意图

m₁—液膜蒸发速率，kg/s； q—热流密度，kW/m²

Figure 4. Schematic Diagram of Liquid Film Evaporation

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图 5 壁面液膜处与直角处液膜几何尺寸

Figure 5. Liquid Film Geometry

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图 6 壁面及直角液膜厚度分阶段示意图

Figure 6. Section Diagram of Liquid Film Thickness

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图 7 受限汽泡流区域模型准确性分析

Figure 7. Accuracy Analysis Results of Confined Bubble Flow

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图 8 环状流区域模型准确性分析

Figure 8. Accuracy Analysis Results of Annular Flow

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