| 摘要 |
PURPOSE:To prevent excess of an engine speed, by suppressing gas temperature and discharge amount in a combustor upon rising of a turbine rotational speed, while increasing these upon lowering of the turbine rotational speed. CONSTITUTION:When a load is rapidly decreased, an engine 2 follows a proportional control line, and reaches a deceleration line. When a rotational speed is further increased, a switch 16 is selected to close a metering valve 18 and cut fuel to be supplied to a combustor 12, thereby reducing an output of a turbine 8. When the rotational speed is further increased, an extraction valve 15 is opened to discharge a compressed air, thereby further reducing the output. Thus, the engine speed is suppressed, and there is no possibility that the engine speed reaches a dangerous speed. |
