Three-dimensional Numerical Simulation of Detonation Initiation in Supersonic Flows

The high thermodynamic efficiency greatly motivates detonation investigation for the application of advanced propulsion systems [1]. Adopting the detonation combustion in the supersonic flow in scramjet may be an alternative choice for advanced propulsion systems. It is more practical to adopt the circular tube for detonation based engine, while some researchers [2, 3] adopted rectangular channels for better observations in detonation experiments with high speed combustible mixtures. However, the detailed threedimensional initiation process between rectangular tube and circular tube in supersonic flow have not been compared and analyzed much and remain unclear.