基于出口调制的气体脉冲压力发生方法研究  

Gas Impulse Pressure Generation Method Based on Outlet Modulation

作　　者：张鹤宇 李博[1] 杨军[1] ZHANG Heyu;LI Bo;YANG Jun(Changcheng Institute of Metrolocy&Measurement,Beijing 100095,China)

机构地区：[1]航空工业北京长城计量测试技术研究所,北京100095

出　　处：《计测技术》2021年第1期36-41,共6页Metrology & Measurement Technology

基　　金：国家自然科学基金项目(5177052767)。

摘　　要：针对航空航天领域对中低压气体脉冲压力测试与校准的需求,介绍了一种基于出口调制型方式的中低压气体脉冲压力发生方法,利用稳定气流源和旋转阀,通过控制电机运动方式可在固定容腔中产生中低气体脉冲压力。根据旋转阀运动状态和阀口流通面积变化情况,建立气体压力关系式,通过理论计算得到的结果验证了旋转阀产生气体脉冲压力的可行性。利用本装置进行实验,开展不同电机转速和进气压力条件的实验,实验表明:产生的脉冲压力幅值在4 MPa以下,脉宽在15 ms以内,并且装置结构对脉冲压力波形影响较为明显,未来可进一步通过装置结构优化得到更为理想的脉冲压力波形。In order to meet the requirements of impulse pressure measurement and calibration in aerospace field,a generation method of medium and low gas impulse pressure was developed,which was based on the mode of outlet modulation.The medium and low gas impulse pressure can be produced in the fixed cavity by using a stable airflow soutce and rotary value to control the motor motion.According to the motion state of the rotary valve and the change of the flow area of the valve port,the gas pressure relation was established.The feasibility of producing the gas impulse pressure by the rotary valve was verified by the simulation results.Experiments with this device are carried out with different motor speeds and intake pressure conditions.The experimental results showed that the impulse pressure amplitude was below 4 MPa and the impulse width was less than 15 ms.The influence of the device structure on the pulse pressure waveform was obvious.In the future,a more ideal impulse pressure waveform can be obtained by optimizing the device structure.

关 键 词：动态压力 发生装置 脉冲压力 动态校准 

分 类 号：TB9[一般工业技术—计量学]