| 摘要 |
PURPOSE:To make possible low air ratio combustion without increasing dusts in the exhaust gas by providing in a nozzle a confluence hole section in which pressurized air and pressurized fluid fuel mix together and making the ratio of L to d more than 1.5, where L is the dimension between the confluence junction and the confluence hole outlet point and d is diameter of the fluid fuel hole. CONSTITUTION:An atomization gas 1 of a high speed given by its passing from an atomization gas chamber 2 to an atomization gas inlet hole 3 accelerates a fluid fuel 4 supplied from a fluid fuel hole 5 and the fuel flows out atomized from the confluence hole 6. The point where the fluid fuel 4 and the atomization gas 1 start exchanging their momenta between them is near the confluence junction point, and from here atomization due to the momentum exchange starts. Certain distance is required for sufficient momentum exchange (atomization effect) of two fluids. According to a test with water, a ratio L/d less than 0.5 does not develop sufficient atomization but develops atomization of coarse particles with streaked atomized particles, and they become extremely minute around at L/d=1.5. By this minute atomization the state close to gas combustion is obtained, allowing low air ratio combustion. |
