埋入式冲压空气进气口性能及影响因素研究

Subjects: Mechanics >> Applied Mechanics submitted time 2023-03-20 Cooperative journals: 《应用力学学报》

孔犇犇 裴后举 崔永龙 李志茂 蒋彦龙

Abstract： The demand for cooling air is continuously increasing as a result of the extensive application ofhigh-performance avionics in aircraft.'Therefore ,it is urgent to develop an efficient and energy-saving ramair system for civil aircraft. Based on i-o SST turbulence model , the coupling characteristics of intermaland external flow fields of aircraft NACA inlet were studied ,and the intake mechanism of NACA inlet wasobtained.On this basis , the evaluation method and index of inlet performance were proposed, and the influr-ences of flight parameters such as Mach number , angle of attack and side-slip angle on aircraft NACA inletperformance were studied.The results show that the ram efficiency and the mass flow rate increase by 9.26% and 3.82 kg/ s , respectively when Mach number increases from 0. 5 to 0.9.As the angle of attackincreases from 0° to 5° , the ram efficiency and the mass flow rate increase by 7.35% and 0.38 kg/s，respectively.The side-slip angle increases from 0° to 4 ° , and the ram efficiency decreases by 6% , whilethe mass flow rate increases at first and then decreases.The present results provide a theoretical basis forthe independent development of large-scale civil aircraft in China.

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