拖锥系统管路延迟时间分析研究  

Study on the effect of pipeline time delay of trailing cone system

作　　者：姜延欢 吴娅辉[1] 杨军[1] 刘渊 谢兴娟 田森 JIANG Yanhuan;WU Yahui;YANG Jun;LIU Yuan;XIE Xingjuan;TIAN Sen(National Key Laboratory of Science and Technology on Metrology&Calibration,Changcheng Institute of Metrology&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计量与校准技术重点实验室,北京100095

出　　处：《计测技术》2022年第1期51-57,共7页Metrology & Measurement Technology

基　　金：国家自然科学基金(51775526);航空科学基金(201946044001)。

摘　　要：延迟时间是拖锥系统的重要技术指标,为实现拖锥系统管路延迟时间的精准预测,本文基于连续性方程和动量守恒方程对拖锥系统进行理论建模,同时考虑不同流动状态管路中粘性阻力的影响,模型的适用性得到改善,同时通过试验验证了模型的准确性,使模型更具备实际工程应用性。在此基础上,研究了管路自身结构参数和环境参数对拖锥系统延迟时间的影响,随着管路长度和环境背压的增大管路延迟时间增大,随着管路直径、阶跃压力和环境温度的增大管路延迟时间降低。Delay time is an important technical indicator of trailing cone system.In order to accurately predict the pipeline delay time of trailing cone system,a theoretical model of the trailing cone system was established based on the continuity equation and the momentum conservation equation with the influence of viscous resistance in pipelines under different flow states taken into consider⁃ation at the same time.The applicability of the model was improved and the accuracy of the model was verified by experiments,which makes the model applicable to practical engineering use.On this basis,the influence of the pipeline structural parameters and environ⁃mental parameters on the time delay of the trailing cone system was studied.The results show that the pipeline delay time increases with the increase of pipeline length and environmental pressure,and decreases with the increase of pipeline diameter,step pressure and environmental temperature.

关 键 词：拖锥系统 延迟时间 理论建模 粘性阻力 湍流 

分 类 号：TB93[一般工业技术—计量学] V217.2[机械工程—测试计量技术及仪器]