| 摘要 |
A steam-type gas turbine subassembly (22) for enhancing the turbine performance includes a stator (24), rotor (26), annular brush seal (28) or annular labyrinth seal (56), and first and second gas-flow deflectors (30, 32). A main flow of gas (44) moves along the stator (24) and rotor (26) which together define a wheel space cavity (46). A secondary flow of gas (48) moves from the main flow of gas (44) adjacent to an upstream stage (36) of the rotor (26) through the wheel space cavity (46) and into the main flow of gas (44) adjacent to a downstream stage (38) of the rotor (26). The annular brush seal (28) or annular labyrinth seal (56) extends across the wheel space cavity (46) between the rotor stages (36, 38) blocking at least a portion of the secondary flow of gas (48). The gas-flow deflectors (36, 38) are radially displaced and offset from one another such that the secondary flow of gas (48) is turned into a tangential relationship to the main flow of gas (44). |
