抄録
The authors investigated the combustion characteristics and gas compositions of combustion with a closed vessel using hydrogen, methane, etc. which are attractive in view of the serious air pollution situation, and possible alternative fuels. As a result, it is possible to decrease the rate of pressure rise and the reduction of NOx concentration by lowering the oxygen concentration in hydrogen-air mixture without deteriorating combustion characteristics such as combustion efficiency, maximum combustion pressure etc. And by using a blended fuel of hydrogen and methane, it was found that the reduction of the rate of pressure rise and NOx concentration were obtained, in comparison with the use of hydrogen only ; and at the same time, the combustion efficiency and HC concentration were improved remarkably in comparison with the use of methane only.
