Title of article :
Experimental and numerical studies of a lean-burn internally-staged combustor
Author/Authors :
Fu، نويسنده , , Zhenbo and LIN، نويسنده , , Yuzhen and Li، نويسنده , , Lin and Zhang، نويسنده , , Chi، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2014
Pages :
9
From page :
488
To page :
496
Abstract :
A lean-burn internally-staged combustor for low emissions that can be used in civil aviation gas turbines is introduced in this paper. The main stage is designed and optimized in terms of fuel evaporation ratio, fuel/air pre-mixture uniformity, and particle residence time using commercial computational fluid dynamics (CFD) software. A single-module rectangular combustor is adopted in performance tests including lean ignition, lean blowout, combustion efficiency, emissions, and combustion oscillation using aviation kerosene. Furthermore, nitrogen oxides (NOx) emission is also predicted using CFD simulation to compare with test results. Under normal inlet temperature, this combustor can be ignited easily with normal and negative inlet pressures. The lean blowout fuel/air ratio (LBO FAR) at the idle condition is 0.0049. The fuel split proportions between the pilot and main stages are determined through balancing emissions, combustion efficiency, and combustion oscillation. Within the landing and take-off (LTO) cycle, this combustor enables 42% NOx reduction of the standard set by the 6th Committee on Aviation Environmental Protection (CAEP/6) with high combustion efficiency. The maximum board-band pressure oscillations of inlet air and fuel are below 1% of total pressure during steady-state operations at the LTO cycle specific conditions.
Keywords :
combustor , Low emission , gas turbine , CFD , NOX
Journal title :
Chinese Journal of Aeronautics
Serial Year :
2014
Journal title :
Chinese Journal of Aeronautics
Record number :
2265460
Link To Document :
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