Research On A New Type Of Combustor’s Design And Performance Verification

This paper designed the combustor based on the overall performance requirements of a certaintype of engine, optimized the structure of the combustor through the numerical simulation, andverified the performance of the combustor through the numerical simulation results.This paper determined the flow distribution and the flame tube structure parameters of thecombustor through overall design calculations, made the flame tube structure design. Theconventional and the new-type triple swirl cup dome were designed respectively by emphasis on thestructure design of the combustor dome. Then optimized the structure of the dome through thenumerical simulation, the results showed that: the outlet angle of the outer sleeve would affect theairflow structure of the dome,45degrees was suitable for the two dome; The length of the middlesleeve also affected it,6mm was suitable for the conventional dome, and4mm was suitable for thenew-type dome. For the new-type dome, the airflow channel length of the volute swirler would affectthe internal flow characteristics of the volute swirler,540degrees was suitable; the export shape ofthe airflow cylinder also affected the airflow structure of the dome, circular arc was suitable.For the combustor used the conventional dome, compared the influence of the holeconfiguration structure of the flame tube to the performance of the combustor. This paper made thenumerical simulation research respectively to three configuration structures of the primary and themixing holes, the results showed that: the configuration of the primary holes would affect the airflowstructure of the dome and the temperature distribution in the flame tube,2-3with asymmetricstructure was suitable for the inside and outside ring road; the configuration of the mixing holeswould affect the mixing characteristics of the combustor and the temperature field of the outlet,3-4with different aperture’s structure was suitable for the inside and outside ring road.The performance of the combustor under the optimized structures was verified through thenumerical simulation results, including the pressure loss, combustion efficiency, outlet temperaturefield and pollutant emission, etc., the results showed that: the combustor with the two head bothcould meet the overall performance requirements of the engine.The thermophysical parameters of the fluid in the combustor was set reasonably during theresearch process, improved the credibility of the calculation results.