Inertial separator

Details Inertial separator Inertial separator

1974-12-24

1976-04-27

Blix, Trygve M.

Aeronautics and astronautics

Aircraft power plants

60 3909P, B64D 3302

Patent

active

039529720

ABSTRACT:
The invention relates to an improvement to an installation for preventing the ingress of super-cooled water, ice, snow and other debris as taught in U.S. Pat. No. 3,329,377. In the patent, an inertial separator effect is used to prevent ingress of super cooled water, ice, snow and other debris to an aircraft engine. The effect is obtained by an installation including a duct formed in a sub-nacelle of the engine to extend generally longitudinally of the engine. An air deflecting surface in the duct confines the incoming air to a passage of reduced cross section, and an opening in the duct wall downstream of the deflecting surface is formed between the trailing edge of the deflecting surface and the leading edge of a rearward portion of the duct, the opening in the duct wall communicating with the engine air intake. In accordance with the present invention, any or all of the following improvements are made to the above installation:
A. a cyclic ice shedder is provided to extend inwardly from the leading edge of the rearward portion;
B. the rearward portion is formed in the shape of a hopper which is spaced from the outlet passage;
C. a fairing is provided at the trailing edge of the deflecting surface; and
D. a lower surface of the duct is contoured between the trailing edge of the deflecting surface and the discharge opening of the duct to provide a fairing between the cross sectional area of the duct at the trailing edge of the deflecting surface and the cross sectional area at the discharge opening.

REFERENCES:
patent: 3148043 (1964-09-01), Richardson et al.
patent: 3329377 (1967-07-01), Peterson et al.
patent: 3513641 (1970-05-01), Hooper et al.
patent: 3765179 (1973-10-01), Strang et al.
patent: 3766719 (1973-10-01), McAnally

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