C-12 水素リッチ燃料焚き多孔同軸噴流バーナの火炎構造の検討(水素含有燃料・燃焼,一般講演)

概要

論文の詳細を見る
The successful combination of integrated coal gasification combined cycle (IGCC) with carbon dioxide capture and storage (CCS) for lower emissions and higher plant efficiency requires gas turbines that can achieve dry low-NOx combustion of hydrogen-rich syngas with a wide range of hydrogen contents. The authors have been developing a "multiple-injection burner" to achieve dry low-NOx combustion of such hydrogen-rich fuels. The purpose of this paper is to investigate flame structures of the burner through visualization and spatial distribution measurement of flame temperature and gas concentrations in order to examine combustion buzz and NOx-generating regions. The experiments were carried out under atmospheric pressure. Two kinds of fuel (hydrogen contents: 40% and 84%) were tested. The mean temperature of the combustion gas at the burner exit was 1500℃. The flame visualization shows that the flame was attached to the burner by a recirculating flow in the outer region of the burner and that combustion buzz was triggered by the flicker of the attached flame. The spatial distribution measurement shows that NOx was produced in high-temperature regions formed downstream behind the attached flame.
2011-07-06