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International Heat Transfer Conference 16

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)

NUMERICAL RESEARCH ON THE LNG BUBBLE GROWTH UNDER FLASH BOILING

Min Xiao
Jiangsu University of Science and Technology, Jiangsu Zhenjiang 212003, China

Yu Fu
Shandong University

Shouguang Yao
College of Energy and Power Engineering, Jiangsu University of Science and Technology, Zhen Jiang, 212003, Jiangsu, China

Xingxing Zhou
Jiangsu University of Science and Technology, Jiangsu Zhenjiang 212003, China

DOI: 10.1615/IHTC16.nee.024311
pages 7737-7744


KEY WORDS: Spray and atomization, Boiling and evaporation, flash boiling, LNG, bubble growth, numerical simulation

Abstract

Flash boiling spray can improve the quality of fuel atomization, and the bubble growth is one of the pivotal factors of flash boiling spray mechanism, so it is very important to study the LNG bubble growth under flash boiling. A validated accurate computational program which is written in Fortran is carried out to simulate the influences of temperature disturbance, ambient pressure and LNG temperature on the LNG flash boiling. According to the curve of time-varying interface acceleration, the process of LNG bubble growth can be divided into three domains: surface tension controlled growth, transition domain and heat transfer controlled growth. The temperature disturbance only has an impact on the initial stage of LNG bubble growth process with no influence to the following two processes. The influence of ambient pressure and LNG temperature on LNG bubble growth process is opposite. All of them can be described as the influence of superheated degree on the LNG bubble growth process. And when the LNG temperature is greater, the ambient pressure is smaller, the superheated degree is greater.

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