Abstract
In order to simulate the scramjet combustor, we tried to produce pseudo-shock waves (PSW) in a duct with 2° diverging angle with Plasma jet (PJ) torches which added heat to the supersonic flow because PSW is produced by heat release of combustion. And we compared the wall pressures and schlieren photographs of the diverging duct with these of the constant cross-section duct. And we considered the correlation of the location of PSW with total input powers. We confirmed what differences appear between the diverging duct with the constant cross-section duct.
