Study on Design of a Supersonic Nozzle : 1st Report Improvement of a Calculating Method for a Flowfield of Mixed Type

Abstract

This paper presents a new method of calculation for designing a supersonic nozzle and the experimental results. In the present method, calculation is started from the convergent part of the nozzle where the flowfield is subsonic and the boundary condition of downstream side can explicitly be given by considering a sonic line which is determined by using a new method which we have developed. The sonic line, as it is, can also be available as the initial value for the calculation of supersonic flowfield. The calculated results have been compared with experimental ones and a good agreement between them has been recognized. Furthermore, by using the present method, we have checked Hall's analytical result and Riise's assumption.