Abstract. The influence of the internal geometry of the channel of the passive diffusers with a second throat on its characteristics has been studied. Two schemes for organizing the compression of the channel (second throat) are considered: a scheme with central body (with pylon) and scheme with a narrowing of the canal walls (lateral compression). The optimal values of the geometric parameters of axisymmetric channels were obtained to achieve the minimum value of the launch pressure: the length of diffuser, the degree of preload, the initial angle of the pylon cone and the channel narrowing angle. A comprassion was made of starting characteristics with optimal geometric parameters for two types of preload.

Keywords: exhaust of supersonic diffuser, organization of preload, launch pressure, stall pressure, three-dimensional calculations, parametric study

For citation: Malkov V. M., Chakchir S. Ya., Kucherenko M. A. Properties of supersonic exhaust diffusers. Aerospace Engineering and Technology. 2023. Vol. 1, no. 4, pp. 82–102. EDN KBKAFM