| 摘要 |
PURPOSE:To provide a gas turbine combustor having less decreasing in output in response to limitation of generation of nitrogen oxide by a method wherein mixture is divided into three sections of high, medium and low at a side wall of a combustor device and some through-pass holes are made so as to enable the mixtures to be supplied either to a pilot combustion area or main combustion area and the mixtures are supplied to each of the combustion areas. CONSTITUTION:Air for use in making mixture is mixed with fuel fed through the through-pass holes 21a, 21b and 21c before it is flowed into the passage ports 22a, 22b and 22c, passed through the passage ports 22a, 22b and 22c into the pilot combustion chamber 2 and the main combustion chamber 3. When it is approximately in a non-loaded condition, only the pilot fuel is supplied and a dispersion combustion under a high efficiency of combustion is carried out. Under a low loaded condition, all the main fuels are supplied only to the outer passage port 22a and only the air is injected from the other passage ports 22b and 22c. Due to this fact, even under such a flow rate of main fuel in which the fuel is mixed with the air for entire premixing operation to cause the excessive lean condition of the mixture, a proper concentration of the mixture can be attained, ignited and ignited under a lean premixed condition, so that a combustion with low nitrogen oxide under a high efficiency of combustion is carried out. |
