A quasi-one-dimensional method for prediction of dual mode scramjet combustor performance

In order to predict the performance of a dual mode scramjet combustor rapidly with high precision, a quasi-one-dimensional unsteady method was studied. Results show that it fails to predict the pressure distribution of pre-combustion shock train when the dual mode scramjet combustor is working in ramjet mode. A modified quasi-one-dimensional unsteady method for prediction of dual mode scramjet combustor performance was developed by coupling a pre-combustion shock train model. The calculation was compared with four published experimental results from the literature. Good agreement is obtained for the pressure distribution and its peak value in the dual mode scramjet combustor. This method has reasonably high precision and wide applicability.