快开阀装置阶跃压力上升时间影响因素研究

Research on Influencing Factors of Step Pressure Rise Time of Quick-Opening Valve Device

快开阀装置作为动态压力校准装置,其产生阶跃压力的上升时间是对压力传感器频响特性和灵敏度校准的重要指标.在实际试验过程中,发现其阶跃压力上升时间与低压腔尺寸及传感器布设位置有关,故有必要对其展开仿真研究.本文以快开阀装置结构为基础,利用FLUENT建立三维数值仿真模型.模型中,高压腔的模拟压力为1500 kPa,低压腔的模拟压力为1500 Pa,高压腔长度为1000 mm.传感器分别布设在低压腔端面与侧壁上不同位置,不断改变低压腔尺寸大小,分别获取多种情况下的压力测量数据,并对结果进行分析.仿真结果表明:快开阀装置产生压力的上升时间受低压腔尺寸及传感器布设位置影响.随着低压腔管腔长度的增大,压力上升时间随之变长,即压力上升时间值与低压腔长度呈正相关.

Quick-openning valve device can be calibrated dynamic pressure.Its step pressure rise time is an important indicator for the calibration of the pressure sensor’s frequency response characteristics and sensitivity.This paper finds that the step pressure rise time is related to the low pressure chamber’s size and the sensor’s location.So it is necessary to carry out a simulation study on it.Based on the structure of the quick-opening valve device,this paper uses FLUENT to establish a three-dimensional numerical simulation model.In the model,the simulated pressure of the high-pressure chamber is 1500 kPa,the simulated pressure of the low-pressure chamber is 1500 Pa,and the length of the high-pressure chamber is 1000 mm.The sensors are respectively arranged at different positions on the end face and side wall of the low-pressure cavity,and the size of the low-pressure cavity is constantly changed,and the pressure measurement data under various conditions are obtained respectively,and the results were analyzed.The simulation results show that the step pressure rise time of quick-openning valve deviceis affected by the size of the low pressure chamber and the location of the sensor.As the length of the low pressure cavity increases,the pressure rise time becomes longer,that is,the pressure rise time value is positively correlated with the length of the low pressure cavity.