Numerical study on the effect of real gas model on the flow structure and shock location of Laval nozzle

Abstract. Design of supersonic nozzle requires accurate and robust procedure since the flow becomes subtle during shifting from subsonic to supersonic. This article presents some aspects fluid features at region when it behaves as real gas using 3D-numerical simulation. The objectives include variation in shock position, properties, model different Nozzle-Pressure-Ratio (NPR). Results CFD simulation showed that ideal predicts higher Mach number than any model. Also, prediction is between SRK BWR models. erroneous predicating approaches 21% for 43% BWR. For range NPR 2-3, position found be proportion NPR; however, significant discrepancy location observed verses assumed.