No matter high speed flight or low speed flight, blowing and suction effect on aircraft engine cannot be ignored, especially the high－lift configuration at low speed flight. To investigate the blowing and suction effect on aircraft engine, a TPS was mounted inside the nacelle of a half model of aircraft; influence quantity of TPS at low speed was obtained by changing the model configuration and adjusting running parameter. In order to get the reliable data, it is necessary to test and adjust the TPS unit before wind tunnel test. This paper discusses this process clearly.