GB623142A - Improvements in or relating to the air intakes of an internal combustion power plant - Google Patents

Abstract

623,142. Air inlets for gas turbines. NAPIER & SON, Ltd., D., SAMMONS, H., and COWDREY, C. L. April 21, 1947, Nos. 10546 and 23707. [Class 4] [Also in Group XXVI] An air intake system for a gas turbine plant subject to icing conditions comprises in combination an annular intake passage F, Fig. 1, running in the fore-and-aft direction, an annular forwardly facing intake opening which is opened or closed by shutter members M rotatable about radial axes, an annular opening K in the outer wall of the intake passage through which air can enter the passage laterally when the forwardly facing intake is closed and means P<SP>1</SP> for supplying hot gases to the forwardly facing intake from which they flow through the shutter members. The annular opening K may be provided with a sliding shutter L which closes the opening when the forwardly facing intake is open. The shutter L may be connected through levers M<SP>3</SP>, Fig. 9, with some of the operating levers M<SP>2</SP> of the shutters M so that when the shutters are closed the annular opening K is open and vice versa. The levers M<SP>2</SP> may be operated by motor O<SP>3</SP> acting through a worm O<SP>1</SP>, a toothed sector O and a link N. The air entering the opening K is taken from the boundary layer of the nacelle through an opening H<SP>2</SP> and is heated by passing over the engine. The hot gases are taken from the exhaust pipe of the engine through the pipe P<SP>1</SP> to the hollow fairing G from where they pass through the hollow bearing pins M<SP>1</SP> into the hollow shutters M. The gases leaving the shutter may be used to heat the nose-piece J. In a modification, Fig. 4, the annular opening is connected directly with the boundary layer adjacent the nosepiece J by a passage K<SP>1</SP> provided with gill-like flaps L<SP>2</SP> adapted to open and close the passage as the shutters M are rotated. In a modification of this arrangement, the passage K<SP>1</SP> is open or closed by a ring-like shutter. In a further modification, the hot gases are supplied to the nose-piece J and pass radially inwards to the shutters M. Specification 592,091 is referred to. Reference has been directed by the Comptroller to Specification 619,390.