S形进气道/JT15D-4涡扇发动机地面实验与数值模拟

摘要

为进一步研究所设计的S形进气道与涡扇发动机共同工作时对发动机性能和稳定性的影响,制作了S形进气道1∶1玻璃钢模型,安装在小型涡扇发动机JT15D-4上,观察发动机在地面台架条件下的工作状态,并进行了相关数据的测量.利用CFD（ComputationalFluid Dynamics）方法进行同样条件下的进气道数值仿真计算.将计算结果与实验结果相比较,结果表明：两种方法得到的数据相吻合,一方面说明所设计的S形进气道与发动机匹配良好,能够保证发动机的正常运转;另一方面说明,CFD方法可用于进气道的设计验证.%The S-shaped inlet working with the turbofan engine was discussed by using ground test and computational fluid dynamics（CFD） codes.A full scale S-shaped inlet model had been made of glass fiber reinforced plastic.The model was installed in front of the JT15D-4 turbofan engine,with the results obtained from the full scale matching ground test at Beijing.Static pressure,total pressure recovery and total pressure contours were presented.Under the same working condition,the performance of the S-shaped inlet was developed by using CFD codes.Based on comparison of CFD code to full scale measured test data,they match well.It means that on one hand the S-shaped inlet was designed properly according to the engine and they can match work together,on the other hand the CFD codes are shown to predict total pressure contours at the duct exit accurately,the CFD codes could be used for the inlet design.