Enclosed test is one of the key test means for aero-engine development,but many practical factors such as space limitation of indoor test stand may deviate the distribution of flow field around the tested engine from the ideal condition,which leads to the errors caused by additional aerodynamic force and so on in the direct measurement result of thrust.A simplified geometric model for the enclosed test cell is established regarding the spatial constraints formed by the wall and exhaust pipe,the influence of spatial constraints on the engine near-circumference flow field is analyzed by numerical simulation method,and by combination of theoretical analysis,the mechanism of additional aerodynamic drag caused by the change of associated flow characteristics is studied.
关键词
航空发动机/室内试车台/空间受限/附加气动力/数值模拟
Key words
aero-engine/enclosed test cell/space constraint/aerodynamic additional resistance/numerical simulation
维普
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