气液混合条件下的引压管路动态特性研究  

Study on the dynamic characteristics of pressure pipeline under gas-liquid mixing conditions

作　　者：史博 陈晓松 李峰 SHI Bo;CHEN Xiaosong;LI Feng(School of Energy and Power Engineering,Beihang University,Beijing 100191,China;AVIC Changcheng Institute of Metrology&Measurement,Beijing 100095,China)

机构地区：[1]北京航空航天大学能源与动力工程学院,北京100191 [2]中国航空工业集团公司北京长城计量测试技术研究所,北京100095

出　　处：《计测技术》2025年第1期105-110,共6页Metrology & Measurement Technology

基　　金：国家“十四五”计量技术基础研究项目(XXXX2023205XXXX)。

摘　　要：利用引压管路进行航空发动机高温脉动压力测量时,高温凝水可能造成引压管路中存在“气夹液”的状态,采用传统的气介质引压管路动态模型进行分析误差较大。针对此问题,基于可压缩流体引压管路系统模型建立“气夹液”条件下的引压管路传递函数,选取相同长度、不同内径的引压管路,通过调节压力、气液比,开展不同气液混合状态下的试验研究,得到引压管路动态特性与气液比之间的关系,并得到不同管径条件下气液混合后引压管路动态特性的差异化特点,为后续其他复杂介质条件下的引压管路动态特性研究打下基础,为提升航空发动机动态压力测试准确性提供技术借鉴。When using pressure pipeline for measuring high-temperature pulsating pressure in aircraft engines,hightemperature condensed water may cause a state of"gas mixed with liquid"in the pressure pipeline,and using traditional dynamic models of gas medium pressure pipeline for analysis may result in significant errors.In response to this issue,a transfer function of the pressure pipeline under the condition of"gas mixed with liquid"was established based on a compressible fluid pressure pipeline system model.Pressure pipelines of the same length but different inner diameters were selected,and experimental research was conducted under different gas-liquid mixing states by adjusting pressure and gasliquid ratio.The relationship between the dynamic characteristics of the pressure pipeline and gas-liquid ratio was obtained,and the differentiated features of the dynamic characteristics of the pressure pipeline after gas-liquid mixing under different pipe diameters were obtained.This lays the foundation for the subsequent research on the dynamic characteristics of the pressure pipeline under other complex medium conditions,and provides technical reference for improving the accuracy of dynamic pressure testing of aviation engines.

关 键 词：引压管路 动态压力校准 气液混合 谐振频率 带宽 

分 类 号：TB935[一般工业技术—计量学] V211[机械工程—测试计量技术及仪器]