| 摘要 |
A turbine assembly includes a first rotor assembly comprising a first case manifold (108, fig 1), a second rotor assembly comprising a second case manifold (110) and a clearance control system 100. The clearance control system 100 is coupled within the turbine assembly upstream from the first and second rotor assemblies and comprises an inlet assembly 102 having an inlet tube 121, a first transfer pipe 104, a second transfer pipe 106 and plurality of louvers 134, 136 which are contoured and oriented to direct cooling air into the inlet assembly 102 so that pressure losses are reduced. The inlet assembly 102 has a plenum 125 which prevents air from leaking out of the clearance control system 100. A smooth curvature of bends 152 also facilitates reduction of pressure losses. Control valves 112, 114 in pipes 104, 106 direct cooling air towards manifolds 108, 110 so as to control thermal expansion and thereby clearance between rotor and stator assemblies. |
