Turboprop with impeller inlet strake

Power plants – Combustion products used as motive fluid – Combined with regulation of power output feature

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137 151, 244 53B, 4151821, F02C 704

Patent

active

054837910

ABSTRACT:
A turboprop engine has in flow series arrangement a crescent shaped inlet, an annular plenum, a compressor, a combustor, and a turbine. The plenum is defined by inner and outer annular walls. A support member referred to as a "boat tail" extends between the walls and is circumferentially positioned 180 degrees from the inlet. A strake extends downstream from the support member and is angled in a direction opposite the rotational direction of the compressor. Thus air entering the engine with either positive or negative swirl is forced to enter the impeller with negative swirl.

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patent: 4938021 (1990-07-01), Jones et al.
patent: 5114097 (1992-05-01), Williams
patent: 5284012 (1994-02-01), Laborie et al.

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