| 摘要 |
A movable spike, variable entrance geometry annular pipe-type diffuser has, for prevention and suppression of flow-induced vibrations, a gear assembly for imparting rotational motion about the axis of a rod member supporting the spike in the diffuser channel, and damper guides fixed to the spike and cooperating with guide slots in the diffuser housing for opposing the rotational motion to create a biasing torque between the spike and housing to increase rigidity and damping.
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