45th AIAA/ASME/SAE/ASEE joint propulsion conference & exhibit

Large-eddy simulations (LES) have been performed for kerosene spray combustion with methane pilot flame in a model dual mode ramjet chamber with a cavity flame holder under the condition of incoming Mach number of 2 and inlet static temperature of 520K. Three cases are compared with a constant equivalence ratio of methane pilot flame of 0.08 but different equivalence ratios of kerosene of 0.10, 0.25 and 0.6 respectively. It is found that the kerosene spray interacts strongly with the pilot flame in the near wall region and the depth of the spray penetration plays an important part in deciding the characteristics of the combustion process, its efficiency and the overall heat addition. When kerosene injection…