The scramjet engine is one of the most promising propulsive systems for future hypersonic vehicles. Over the last fifty years the scramjet engine technology has been intensively investigated and several such engines have been flight-tested in recent years (Neal, Michael, & Allan, 2005; Paul, Vincent, Luat, & Jeryl, 2004). Research on supersonic combustion technologies is of great significance for the design of the engine and many researchers pay significant attention to the hypersonic airbreathing propulsion. The mixing and diffusive combustion of fuel and air in conventional scramjet engines take place simultaneously in the combustor (Huang, Qin, Luo, & Wang, 2010). Since the incoming supersonic flow can stay in…