【作者】 陈宇； 王锁芳； 邱长波； 李鹏飞；

【Author】 Chen Yu;Wang Suofang;Qiu Changbo;LI Pengfei;College of Energy and Power Eegineering,Najing University of Aeronautics & Astrotsnautics;

【机构】 南京航空航天大学能源与动力学院；

【摘要】 为探究叶栅型预旋喷嘴的特性,本文主要针对预旋叶栅喷嘴进行了数值模拟与实验研究。针对给定的叶栅喷嘴结构,进行相关的数值计算工作;设计试验方案,开展流量特性试验以及出口流场试验,将试验数据与数值模拟结果进行比较,总结分析。研究结果表明:随着叶栅喷嘴进口总压的增大,流量系数先增加后减小,最后趋于稳定。约在进口总压为0.118325MPa时,流量系数达到最大;得到了叶栅喷嘴的出口流场分布。出口气流集中在一放射状环带内,其速度在靠近叶栅出口处较大,远离后迅速降低;其方向基本沿叶栅流道的方向。更多还原

【Abstract】 In order to explore the features of cascade pre-swirl nozzle,the numerical and experimental researches both have been applied to study cascade pre-swirl nozzle.Related calculation is carried out according to the structure of the cascade nozzle.Testing programs are designed to carry out experiments of flow characteristics and exit flow field.Results of numerical calculation and experimental study are compared and analyzed.Research results indicate that:with the increase of inlet total pressure,flow coefficient firstly increases,then decreases,finally tends to be stable.Flow coefficient reaches the maximum when inlet total pressure is 0.118325 MPa;Exit flow field distribution of cascade nozzle is obtained.Exit flow is concentrated in a radial ring form.The velocity is fast near the exit of cascade and decreases rapidly when far from the exit.The direction of the flow fits the direction of cascade passage roughly.更多还原