Effect of Combustor Configuration on Flow and Combustion in a Scramjet Engine

Operation of a scramjet engine involves many gas dynamic and combustion phenomena. The components of a scramjet engine, such as the intake, isolator, fuel injector, and flame holder, interact with each other in a complicated manner and may result in successful engine operation or fall into intake unstart, misfire, blowout, or thermal choking. Much of the previous experimental research on scramjets focuses on a single component, and examples of experimental research on the integrated intake, isolator, and combustor are fewer. An electric spark igniter installed inside the cavity is used for the ignition of the fuel. The positions of the fuel injectors and the cavity are fixed for all tests. The combustor diverging part angle is 4 deg for all tests. Wall static pressure tabs are installed on the engine bottom side along the centerline.