航空发动机进口帽罩结/防冰特性试验研究

Experimental Research on Icing/Anti-icing Properties of Aero-engine Inlet Cowl

航空发动机进口帽罩作为发动机重要的进口部件,防冰能力关乎发动机性能甚至影响飞行安全。为了研究航空发动机进口帽罩防冰性能,通过冰风洞对进口帽罩进行结/防冰试验,得到了进口帽罩表面结冰状况随热气流量、来流温度、来流风速的影响规律。试验结果表明:进口帽罩防冰能力从尖锥头部到帽罩后端逐渐增强;帽罩防冰能力随热气流量增加而提升;帽罩表面冰型随来流温度、来流风速变化而发生改变;帽罩表面结冰区域随风速增加而扩大。研究成果可以为进口帽罩防冰系统设计和验证提供重要指导。

Inlet cowl is an important part of aero-engine.Its anti-icing ability relates to engine performance,and even affects flight safety.In order to investigate anti-icing properties of aero-engine inlet cowl,influence of hot-air flow,entrance temperature,entrance velocity on icing condition of inlet cowl was obtained by icing experiment and anti-icing experiment in the icing tunnel.The test results show that the anti-icing capability of the inlet cowl is enhanced from the cone to the end of cowl.The anti-icing effectiveness of the inlet cowl increases with hot-air flow.The inlet cowl s surface ice type varies with entrance temperature and entrance velocity.The icing area of the inlet cowl increases with increasing entrance velocity.The research results have important guidance for the anti-icing system design and verification of aero-engine inlet cowl.