Various averaging methods were introduced,including common mass or area weighted averaging method,including the conserved mass/momentum/energy(CMME) method and the conserved mass /energy/entropy(CMES) method. A model containing scramjet inlet and combustor was used to reveal the difference between different averaging methods,and effects of entrance data from different averaging methods on combustor one-dimensional analysis. Results show that the conserved methods are recommended when dealing with scramjet c...