Prathiksha Devang, S BS BPrathiksha DevangPriyanka HansdaGouthami, MMGouthamiNithya Sai, MMNithya SaiDr. Athul Joseph2026-02-122026-02-1227-05-202573p.https://gnanaganga.alliance.edu.in/handle/123456789/9668This project designs and analyzes a convergent-divergent SCRAMJET nozzle utilizing Prandtl-Meyer expansion theory to create efficient, shock-free supersonic flow. The contour of the nozzle was developed using a MATLAB script based on principles of isentropic expansion and an expanding fan to provide smooth turning of the flow with no oblique shock generation. The resulting geometry was modelled with SolidWorks and simulated with ANSYS Fluent via a 2D steady-state simulation with the SST k-? turbulence model and heat transfer.The CFD simulation results showed a steady increase of the Mach number along the nozzle with even pressure and temperature gradients, verifying the design efficiency. Of the test cases conducted with different inlet conditions, the nozzle performed satisfactorily in reducing the losses in pressure while ensuring a flow of the same quality. The project was successful in verifying the employment of theoretical expansion fan-based design of the nozzle for the SCRAMJET propulsion system and provides a solid platform for further development of hypersonic propulsion.enSCRAMJET Nozzle DesignPrandtl-Meyer Expansion TheoryCFD SimulationIsentropic ExpansionOther