1种民用涡轴发动机吸冰适航符合性试验方法

A Test Method for Airworthiness Conformance of Ice Ingestion of Civil Turboshaft Engine

为了验证涡轴发动机对《航空发动机适航规定》CCAR-33R2条款要求的适用性,根据飞行实践中形成的不同冰型,选定明冰作为被吸物。设计带有分离层的冰模来降低冰分离的难度,并提高冰的质量;反复测量制冰温降曲线,利用其特点制作出符合要求的试验用冰。设计投冰系统并根据调试情况进行优化设计,确保其满足试验符合性要求。结果表明:在试验过程中参数正常,发动机未出现熄火、喘振及发生不可接受的损伤;验证了某发动机满足适航符合性要求。

In order to verify the applicability of the turboshaft engine to the requirements of the CCAR-33 R2 provisions of the Airworthiness Regulations for Aeroengine,the bright ice was selected as the sucked object based on the different ice types formed in flight.The ice mold with separation layer was designed to reduce the difficulty of ice separation and improve the quality of ice.The temperature drop curve of ice making was measured repeatedly,and the test ice was made according to its characteristics.The ice-spraying system was designed and optimized according to the debugging conditions to ensure that it met the requirements of test conformance.The results show that the parameters are normal during the test,and the engine has no flameout,surge and unacceptable damage.It is verified that the engine meets the requirements of airworthiness conformance.