取样密度对燃烧室试验测量结果的影响

在航空发动机和燃气轮机燃烧室部件试验中,取样密度会对燃烧室出口温度测量结果产生影响,如果取样密度过小,会造成燃烧室出口温度测量值与"实际值"之间偏离度过大。基于此,对3种燃烧室的试验数据进行了分析。同时将试验采集到的"高取样密度"的原始数据沿圆周方向进行均匀"拆分","拆分后"得到不同密度的"低取样密度"数据,将该数据与原始"高取样密度"试验数据的分析结果进行了对比,得出了取样密度与测量偏离度之间的关系,并给出了满足工程研制需要的取样密度。

Effect of Sampling Density on Measurement Results in Combustor Test

The sampling density can affact the combustor outlet temperature in aeroengine and gas turbine combustor component test. If the sampling density was not enough, the deviation degree between the measured temperature results and the real temperature would be large. The test data of three kinds of combustors were analyzed. The initial data for high sampling density were detached uniformly in circumferential, then the data for low sampling density with different sampling density were obtained, which compared with the analysis results of initial data for high sampling density. The relationship between sampling density and the deviation degree of measurement was presented, and the sampling density satisfied with the engineering research are given.