气道稳流试验台测量精度研究  

Study on Measurement Accuracy of an Inlet Port Steady Flow Test Rig

作　　者：魏鹏飞 潘洁 鲁祯[1] 王天友[1] 谭从民 郝彩凤 WEI Pengfei;PAN Jie;LU Zhen;WANG Tianyou;TAN Congmin;HAO Caifeng(State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China;Engine R&D Center, Weichai Power Co. , Ltd. , Weifang 261061,China)

机构地区：[1]天津大学内燃机燃烧学国家重点实验室,天津300072 [2]潍柴动力股份有限公司发动机研究院,潍坊261061

出　　处：《内燃机工程》2020年第4期70-78,共9页Chinese Internal Combustion Engine Engineering

基　　金：国家杰出青年科学基金项目(51525603);国家自然科学基金项目(51976133)。

摘　　要：为了确保多缸机气道稳流试验台的测试精度,采用误差分析理论与测量系统分析方法,从直接因素与间接因素两个方面分析了气道稳流试验台测量系统的精度,找出主要的误差来源。结果表明:涡流动量计与流量的测量精度对涡流比与流量系数测量结果的影响最大,分别占测量总误差的85.68%与94.15%。若气门升程偏差0.1 mm,测量结果会产生1%左右的变化。试验缸盖定位向外侧偏差1.0 mm时,不会对流量系数造成显著影响,但会使涡流比增大14.43%。气道稳流试验台的重复性与再现性为28%,人为因素的再现性几乎不会对试验结果造成影响。In order to ensure the measurement accuracy of an inlet port steady flow test rig,the error analysis theory and the measurement system analysis method were used to analyze the main sources affecting the measurement accuracy from direct and indirect factors.Results showed that the measurement accuracy of swirl momentum meter and intake flow meter had the greatest influence on the measurement results of swirl ratio and flow coefficient,accounting for 85.68%and 94.15%of total measurement error,respectively.For the valve lift deviation of 0.1 mm,the measurement result would change about 1%.When the outward deviation of the measured cylinder head positioning reached 1.0 mm,the swirl ratio may increased by 14.43%,but the flow coefficient would not change significantly.Moreover,the repeatability and reproducibility of the steady flow test rig could reach 28%,and the reproducibility of human factors would hardly affect the test results.

关 键 词：进气道 稳流试验 精度分析 测量系统分析 

分 类 号：TK417[动力工程及工程热物理—动力机械及工程]