希薄予混合型ガスタービン燃焼器に関する研究(第2報) : (火災安定機構と排気特性)

概要

論文の詳細を見る
The lean premixed combustion technique appiled to the gas turbine combustor was examined on its characteristics for a wide range of operating conditions by using a model combustor. A recirculation zone generated in the upstream region by strong swirl motion and a flame holder plays an important role in a flame stabilization by exchanging heat and active species with the main flow. The heat exchange rate between the recirculation zone and main flow by turbulent diffusion through the boundary region controls the stability of lean premixed combustion. At a very lean condition, below 0.6 of equivalence ratio, the flame around the recirculation zone partially blows off due to insufficient heat and active species supply from the low temperature recirculation zone. The increase of unburned gas emission due to partial blow-off brings about a decrease of combustion efficiency.
社団法人日本ガスタービン学会の論文
1993-12-10