Combustion and emission numerical simulation of shape morphing jet-stabilized combustor
According to the requirements of low pollution emission of gas turbine in recent years,in order to take advantage of an elliptical combustor and improve poor matching between its outlet and the gas turbine,a concept of shape morphing was proposed,which made the inlet of the jet-stabilized combustor elliptical and the outlet circular.Using numerical simulation methods,the combustion characteristics and flow and emission characteristics at the outlet of the combustor were studied.The influence of shape morphing on the emission and flow characteristics of the combustor was investigated.Shape morphing combustor reduced NO emission by 51.26％compared with circular combustor,maintaining the advantage of low emissions from the elliptical combustor;compared with the elliptical combustor,2.85％of NO emission was sacrificed,but the uniformity of outlet temperature was improved by 4.27％.At the same time,it can provide a more matched temperature distribution for the blades in the rear gas turbine,and prove the feasibility of the cross section gradual change concept,which can serve as a reference for further research on cross section gradual change technology.
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