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流动液体中的压力变化会引起气泡和气穴的产生及破灭,而气泡和气穴又会对液体的流动产生影响及压力变化.为了合理预测流控系统瞬态压力脉动过程中气泡和气穴的体积变化及其对脉动传播过程的影响,基于气泡溶解和析出的物理过程,建立了压力脉动过程中气泡和气穴产生及破灭的数学模型,并提出采用遗传算法对气泡模型中初始气泡体积、气体溶解和析出时间常数进行参数辨识.以一段液压油管路为研究对象,对管路中伴随气泡和气穴的瞬态压力脉动过程进行仿真及实验研究.利用仿真及实验结果,验证了采用遗传算法对气泡模型进行参数辨识的可行性.
The pressure changes in the flowing liquid will cause the bubble and cavitation to occur and burst, while the bubbles and cavities will affect the liquid flow and the pressure change. In order to reasonably predict the volume changes of bubbles and cavities during the transient pressure pulsation of the flow control system Based on the physical process of bubble dissolution and precipitation, a mathematical model of bubble and cavitation generation and collapse during pressure pulsation was established and the effects of initial bubble volume, gas dissolution and gas diffusion on the bubble model And the time constant is extracted to identify the parameters.The transient pressure pulsation process accompanied by air bubble and cavitation in the pipeline is simulated and experimentally studied with a section of hydraulic oil pipeline.Using the simulation and experimental results, Feasibility of parameter identification.