| 摘要 |
PURPOSE:To equalize an injection quantity of water in each nozzle, by providing an injection water quantity control means in the water injection nozzle provided in each of the plural combustors and regulating said means in accordance with height setting the water injection nozzle, in the case of a water injection multi- can gas turbine. CONSTITUTION:A multi-can gas turbine, arranging a plurality of combustors 2 in an equal pitch on the periphery, sets a fuel nozzle (not shown in the drawing) and a water injection nozzle 8 in each combustor 2. A pump 10 supplies pressurized water to this water injection nozzle 8 through a shut off valve 11, flow regulating valve 12, annular injection water manifold 13 and a supply pipe 14 branching from said manifold 13. Here, mutually different height setting the water injection nozzle 8 causes an unequal water pressure applied to each nozzle 8, and in order to prevent this unequal water pressure the branch supply pipe 14 interposes an orifice 23 and/or a pressure control valve (not shown in the drawing) for regulating a flow in accordance with the height setting the nozzle 8. |
