为了满足增强隐身效果、减少飞行阻力等方面的需要,导弹外机身必须设计成流线型,其进气道也要设计成弯曲式管道.而进气道的弯曲会造成流动畸变,严重影响出口的气流品质和发动机性能.因此,充分研究弯曲气道的气流流动对于进一步改善其管道流动性能及推动喷气推进系统技术的发展有重大意义.本文简述了国内外在弯曲管道中气流流动的数值计算与实验方面的研究概况,介绍了几种计算弯管内气流流场的差分格式以及一些流场测量方面的先进技术,并就其今后的研究方向提出了一些有益建议. In order to meet the need of enhancing the stealth effect and reducing the flight resistance, the outer fuselage of the missile must be designed as a streamlined type, and its intake duct must also be designed as a curved duct, while the bending of the intake duct will cause the flow distortion and seriously affect the export Airflow quality and engine performance.Therefore, it is of great significance to study the airflow in curved airway sufficiently to further improve its pipeline flow performance and to promote the development of jet propulsion system.This paper briefly describes the numerical calculation of airflow in curved pipe at home and abroad In this paper, we introduce the difference schemes of calculating the airflow field in elbow and some advanced techniques of flow field measurement, and put forward some useful suggestions for the future research direction.