Design Of Key Components And Performance Assessment Test For Ramjet Combustor

In order to improve the performance of a ramjet combustor, flameholder and fuel system components were designed in this paper. Numerical and experiment investigation were also carried out to explore the performance of the combustor based on the components design.According to the design, flameholder system including film vapor flameholder,V-gutter flameholder and flame passage was given. A separate fuel system was designed for the film vapor flameholder. The main stream fuel was supplied by different zones and fuel pressures, and the system regulation range can reach 0.0860 to 3.2746kg/s.The complex flow filed of the combustor was numerically simulated by using the commercial CFD (Computational Fluid Dynamics) software named FLUENT in the paper. The flow pattern,mass flow distribution,flow drag performance and fuel spray characteristics were obtained and analyzed in detail. The results show that the components design was acceptable.Finally, the combustion performance including ignition,lean blow out performance and combustion efficiency were experimentally investigated at normal and low pressure. The experiment result show that the combustion efficiency can reach over 90% at normal pressure. In addition, the ignition and lean blow out performance were mainly depended on the structural parameters of film vapor flameholder at typical combined working conditions.The paper can provide basis for the development of ramjet combustor.