Describing uncertainties encountered during laboratory turbocharger compressor tests
Describing uncertainties encountered during laboratory turbocharger compressor tests
复制标题
描述实验室涡轮增压器压缩机测试期间遇到的不确定性
DOI：
--
复制
发表时间：
2012
期刊：
影响因子：
--
通讯作者：
D. Chalet
中科院分区：
文献类型：
--
作者：
H. Mohtar;P. Chessé;D. Chalet
为了改进现有的涡轮增压器压缩机技术（喘振裕度增加、提高压缩能力等），压缩机测试需要精确地确定效率、压力和精确的喘振线位置。此外，由于在涡轮增压器压缩机性能测试期间通常遇到的非理想测量条件，因此必须定义实验的测量不确定度。本文论述了给定试验设备的涡轮增压器压气机试验结果的可靠性。本文首先对测量不确定度进行了一般性介绍，然后介绍了涡轮增压器试验设备以及不同传感器的误差来源。从压气机性能关系推导出不确定度方程，在不确定度方程中引入传感器误差，在压气机试验前预测压气机在不同工况点的效率、压力和质量流量不确定度。对压缩机9个不同工作点进行了不确定度分析。最后，主要影响压气机性能结果的参数被识别。
To improve the existing turbocharger compressor technologies (surge margin increase, improving compression abilities, etc.), compressor tests require accurate determination of efficiency, pressure, and exact surge line emplacement. Moreover, due to nonideal measurement conditions typically encountered during turbocharger compressor performance testing, it is imperative to define measurement uncertainties to the experiments. This article deals with how reliable the results of the turbocharger compressor tests for a given test facility are. This article begins with a general introduction to measurement uncertainties, and a description of the turbocharger test facility together with sources of error of the different transducers is then presented. Uncertainty equations are derived from compressor performance relations; transducer errors were introduced to uncertainty equations so that the efficiency, pressure, and mass flow uncertainties of compressor at different functioning points can be predicted before compressor testing. Uncertainty analysis of nine different compressor functioning points was carried out. Finally, parameters that mostly affect the compressor performance results were identified.