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气穴中液压油温度随气泡膨胀变化规律

DOI: 10.3969/j.issn.1006-7043.201312022

Keywords: 液压系统, 气穴, 气泡半径, 液压油温度, Rayleigh-Plesset方程, 多变指数

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Abstract:

针对液压系统中气穴的产生及其发展过程常伴随着液压油温度变化的现象,研究了液压系统中气穴产生及其发展过程与液压油温度变化的关系.结合液压系统中气穴产生及其发展过程的特点,对气穴中气泡产生、发展过程中的热力学条件进行适当假设,应用热力学原理推导了气穴产生时气泡膨胀阶段气泡半径变化与液压油温度变化之间的关系式,改进了Rayleigh-Plesset方程.应用数值计算方法对气泡半径与液压油温度的关系进行了数值模拟研究,并通过试验进行了验证,得出气穴产生后,在气泡膨胀的整个过程中,多变指数k取1~1.24更符合实际规律.

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