Experimental research of reciprocating oscillatory gas-liquid two-phase flow

被引：17

作者：

Zhu Hairong ^{[1
]}

Duan Junfa ^{[2
]}

Cui Haiting ^{[1
]}

Liu Qinggang ^{[1
]}

Yu Xinqi ^{[1
]}

机构：

[1] Hebei Univ Sci & Technol, Sch Mech Engn, Shijiazhuang 050018, Hebei, Peoples R China

[2] North China Univ Water Resources & Elect Power, Sch Mech Engn, Zhengzhou 450045, Henan, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2019年 / 140卷

基金：

中国国家自然科学基金;

关键词：

Oscillatory heat transfer; Gas-liquid two-phase flow; Flow characteristics; Oscillation frequency; Water filling ratio;

D O I：

10.1016/j.ijheatmasstransfer.2019.06.037

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Piston cooling effect is one of the key factors affecting the reliability of internal combustion engine. In order to investigate the influence of oscillatory flow structure of engine oil in the cooling oil gallery of piston on the heat transfer enhancement, and to reveal the oscillatory heat transfer mechanism of gas-liquid two-phase flow, the oscillatory flow structure of gas-liquid two-phase flow in the simplified rectangular cavity was obtained by high-speed photography technology. The effects of oscillatory structure of two - phase flow on average heat transfer coefficient of wall surface at different oscillation frequencies and water filling ratios were analyzed, and the effects of different oscillation frequencies and water filling ratios on maximum bubble diameter and mixing ratio were also studied. Results show that oscillation frequency is the primary factor influencing the oscillatory heat transfer effect of gas-liquid two-phase flow, the higher the oscillation frequency, the higher the average heat transfer coefficient of wall surface. The average heat transfer coefficient of wall surface will decrease if the water filling ratio is extra large or small, which is the highest at water filling ratio of 40%-60%. (C) 2019 Elsevier Ltd. All rights reserved.

引用

页码：931 / 939

页数：9

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