含气油液有效体积弹性模量理论模型研究
China Mechanical Engineering(2017)
Abstract
为准确预测含气油液在空气分离压下有效体积弹性模量的值,基于油液体积弹性模量定义和质量守恒定律,依据含气油液中气相成分随压力的变化过程,推导出含气油液有效体积弹性模量理论模型.数值计算结果表明:含气油液有效体积弹性模量理论模型B-p曲线与现有理论模型及实验数据拟合曲线基本吻合,验证了理论模型的正确性,特别是在低于大气压的极低压区,有效体积弹性模量预测值更加接近实际情况.分析了初始含气量、压力、升压时间对有效体积弹性模量的影响,结果表明:在低于空气分离压范围内,初始含气量增大,有效体积弹性模量减小;在一定范围内,升压时间增大,有效体积弹性模量小幅度增大.
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Key words
initial air content,pressure rising time,saturation pressure,hydraulic oil,effective bulk modulus
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