Experimental Study for Anti-icing System of Civil Aircraft Nacelle in Ground Freezing and Fog

According to rule 1093(b)(2) of Part 25 Airworthiness Regulation about the requirement of anti-icing system of civil aircraft nacelle in ground freezing and fog, a freezing in open environment simulator was built. The performance of the system in ground freezing and fog was verified. Airworthiness test was carried out in the real aeroengine operating condition. The test method for anti-icing system of civil aircraft nacelle in ground freezing and fog was provided in detail. The results show that the testing program is feasible, the method was conform to Part 25 Airworthiness Regulation about the airworthiness requirement of anti-icing system of civil aircraft, and it has been applied on an aircraft type successfully. The method could be used in other aircraft types.