压气机效率测量与不确定度分析  

Measurement and Uncertainty Analysis of Compressor Efficiency

作　　者：廖英栋 卢春霞[1] Liao Yingdong;Lu Chunxia(Mechanic and Electronic Engineering,Xi'an Technological University(Xi'an,Shaanxi,710021,China)

机构地区：[1]西安工业大学机电工程学院,陕西西安710021

出　　处：《小型内燃机与车辆技术》2020年第1期63-66,共4页Small Internal Combustion Engine and Vehicle Technique

摘　　要：为了评估实验平台单级涡轮增压器压气机的性能,分析了等熵效率的性能参数误差来源,并依等熵效率在绝热条件与非绝热条件下的测量模型及其不确定度评价方程,得到等熵效率的高精度测量结果。同时对不可避免的传热损失进行了模型预测分析,结果表明每损失1 000 J热量会影响该压气机效率2.6个百分点,得到更精确的压气机效率值。In order to evaluate the performance of single-stage machines with a relatively low-pressure ratios in the turbocharger compressor testing,the error sources of performance parameters of isentropic efficiency are analyzed,and the high precision measurement results of isentropic efficiency are obtained,according to the measurement model and uncertainty evaluation equation of isentropic efficiency under adiabatic and diabatic flows.Meanwhile,the inevitable heat transfer is predicted and analyzed by the model.The results show that the compressor efficiency is affected by 2.6%per 1000 J heat loss,and a more accurate compressor efficiency value is calculated.

关 键 词：压气机 等熵效率 不确定度评定 传热 

分 类 号：TK411.8[动力工程及工程热物理—动力机械及工程]