Water ingestion test technical of transport aircraft power system

On the basis of analyzing and interpreting the Chinese civil regulations transport airworthiness standards of Civil Aviation Administration of China （CAAC） and advisory circular of Federal Aviation Administration （FAA），the water ingestion test program，test pool scheme and landing speed measurement and control technology was studied and designed from two aspects of engineering test and airworthiness verification.Based on the airworthiness standard system，the procedure of transport aircraft power system water ingestion test was developed and applied in the ARJ21-700 aircraft flight test.The results showed that the designed water ingestion test procedure was reasonable and feasible，and it was able to verify power systemcompliance with standards completely when the transport aircraft passed through the water contaminated runway；the critical speed of ARJ21-700 aircraft equipped with CF34-10A engine was 166.6 km/h in aircraft taking off and slipping through the water contaminate runway；the maximum fluctuations of the rotation rate of fan and compressor，and inter turbo temperature were 5.1%，1.7% and 39 ℃.The performance of engine was better in idle state compared with maximum reverse thrust state in the aircraft landing and slipping through the water contaminated runway.So it could meet the airworthiness standard.The procedure and technology provide a direct support for the power system water ingestion test of C919，C929 and other transport aircrafts.