An Overall Bubble Diameter Model for the Flow Boiling and Numerical Analysis through Global Information Searching

被引：5

作者：

Xu, Zhexuan ^{[1
]}

Zhang, Junhong ^{[1
,2
]}

Lin, Jiewei ^{[1
]}

Xu, Tianshu ^{[1
]}

Wang, Jingchao ^{[1
]}

Lin, Zefeng ^{[1
]}

机构：

[1] Tianjin Univ, State Key Lab Engine, Tianjin 300072, Peoples R China

[2] Tianjin Univ, Renai Coll, Tianjin 301636, Peoples R China

来源：

ENERGIES | 2018年 / 11卷 / 05期

基金：

国家重点研发计划;

关键词：

subcooled flow boiling; bubble diameter; heat transfer; collision; phase interaction; DEPARTURE; PREDICTION; PHASE; WATER;

D O I：

10.3390/en11051297

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Bubble diameter is important for the three-dimensional nucleate boiling two-phase flow simulation. However, the bubble diameter is rarely considered as a variable because it is difficult to estimate. In this paper, a novel bubble diameter model is proposed for the boiling flow. The heat transfer growth, the breakup or coalescence of collision and the liquid impacting separation are considered as the factors affecting the bubble diameter, and three bubble diameter sub-models are developed to calculate the overall bubble diameter based on a departure diameter. In the model, the heat transfer growth is calculated after estimating the bubble location. The collision variation is deduced from the interfacial area concentration equation. The liquid impacting variation is calculated through phase interaction force and gas viscous force. The proposed model is conducted through global information searching in the flow boiling simulation and validated using the void fraction and temperature data from the literature. The effects of the heat transfer growth, the collision, and the separating volume on the bubble diameter are discussed.

引用

页数：20

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