RAM AIR TURBINE WITH VARIABLE FLOW PASSAGE

摘要

A ram air turbine includes a cup-shaped disc (13) consisting of a central portion (20) having radially extending blades (18) is attached with its central portion to the protruding hub portion (12) of a radial flow turbine wheel (2) having a backing plate (10) extending transversely to its rotational axis (7) and having axially protruding turbine blades (11) in addition to the protruding hub portion (12). Ram air enters the turbine blades (11) through the space between air inlet (4) and the disc (13). At high rotational speeds this disc (13) will tend to straighten out, whereby the effective portion of the turbine blades will be reduced and the increase in the rotational speed restricted, despite great variation in the velocity of a missile incorporating the turbine.