A Small Turbofan Engine Performance Testing Techniques

From 1920',all the Great Power of aeronautics start to research high altitude wind tunnel test and high altitude simulate test.Now the test-study has been the key of research of an aeroengine which is perfect,perdurable and dependable.The high altitude simulate test has more and more important effect during the research of aeroengine.In ChapterⅠ,the dissertation at first briefly presents the aim and the content of test-study of aeroengine,composition and operation principle of the altitude simulated test bed, the categories and test abilities of altitude cell, as well as the development statuses of the simulated altitude cell at home and abroad.On the basis of above, the dissertation shows what it discusses.In ChapterⅡ,the dissertation presents all the cells of the simulated altitude test bed which named SB121,and presents detailedly about the gas-fountain,the high altitude cabin,the pressure adjust system,and the testing system.In ChapterⅢ, the dissertation describes briefly about a minitype turbofan aeroengine,about its the develop backdrop,configuration and performance.Through the parallel between the result of test and the performance of design, the technique of design can be validated and improved.In ChapterⅣ,the dissertation briefly presents the method of parameters measurement and distribution,and presents detailedly about the method of parameters measurement of main capability parameter,such as the air mass-flow, oil mass-flow, the total thrust and the net thrust.In ChapterⅤ,the dissertation presents how to assure the validity of aeroengine test, the methods of computation and demarcate of different type of meterage channels,the methods of error analysis.The end, the dissertation briefly presents the result of computation and demarcate of SB 121.In ChapterⅥ,the dissertation presents the need of data processing and data analysis,the calculation method of the performance parameter,the modifying method of the warp of simulation,the calculation method of the performance parameter of components.Through the parallel between the result of test and the performance of calculation,the validity of test can be judged,and what about the going within all the parts of the aeroengine can be validated.In ChapterⅦ,the dissertation briefly presents the result of the high altitude simulate test of the minitype turbofan aeroengine at the check point.The result of test shows that the design skill of this minitype turbofan aeroengine is advanced, and the result has achieved the target.The test can offer auspice in design skill for the study in model.