Hamilton Sundstrand Corporation

United Technologies Corporation

Jack V Vitale

Stacey H Light

Brian C DeDe

Jeffrey V Stenberg

Behzad Hagshenas

Jay Francisco

Daih-Yeou Chen

Melissa A Bell

Michael J Rollins

Omar I Osorio

Chris Hayden

Dietmar Trees

Chung Wong

Paul Piconi

Tony Reichmann

An auxiliary power unit for an aircraft includes a turbine engine. An inlet includes an opening and a passageway between the opening and the turbine engine. An acoustic splitter is supported within the passageway for attenuating noise within the inlet. An inlet door is movable between a closed position and a fully open position. A portion of the inlet door aligns with a part of the passageway in at least a first position and divides the passageway to deflect ice and noise in at least a second position. An air inlet and a method are also disclosed.

Acoustic controlled ice deflecting auxiliary power unit inlet system

An example inlet duct screen assembly includes a grid portion including a plurality of apertures and a frame portion circumscribing the grid portion. The grid portion and the frame portion are formed from a single sheet of material.

Inlet duct screen assembly

An example inlet duct screen assembly includes a grid portion having a plurality of apertures and a frame portion circumscribing the grid portion. The grid portion and the frame portion are formed from a single sheet of material. An example method of making an auxiliary power unit inlet duct screen includes machining apertures in a sheet of material to establish a grid portion of an inlet duct screen.

Auxiliary power unit inlet duct screen assembly

An aircraft auxiliary power unit assembly includes an aircraft skin that provides a cavity. It is secured to a structure in an assembled condition and it provides an opening. An auxiliary power unit is arranged within the cavity and is secured to the structure. The aircraft skin substantially covers the auxiliary power unit in the assembled condition. An inlet duct that is removable is secured within the opening and is selectively connected to the auxiliary power unit between the installed and service positions. The installed and service positions are with the aircraft skin in the assembled condition.

Auxiliary power unit inlet

An aircraft auxiliary power unit assembly includes an aircraft skin providing a cavity. The aircraft skin is secured to a structure in an assembled condition and provides an opening. An auxiliary power unit is arranged within the cavity and secured to the structure. The aircraft skin substantially covers the auxiliary power unit in the assembled condition. An inlet duct is removably secured within the opening and is selectively connected to the auxiliary power unit between installed and service positions. The installed and service positions are with the aircraft skin in the assembled condition. A method of servicing the auxiliary power unit includes removing the auxiliary power unit inlet duct from the opening in the aircraft skin. The auxiliary power unit that is arranged within the cavity of the aircraft skin is exposed. A portion of the auxiliary power unit is serviced through the opening.

An inlet silencer for an air inlet in a housing, which housing contains a source of high frequency noise radiated by an air intake for the source of high frequency noise, comprises: a plenum that extends longitudinally within the housing that couples the air inlet in an upstream region of the plenum to the air intake for the source of high frequency noise in a downstream region of the plenum; a partition that extends laterally within the plenum between the upstream region of the plenum and the downstream region of the plenum; at least one channel that penetrates longitudinally through the partition that has a gap across its inner surface that approximates one wavelength of at least one fundamental frequency of high frequency noise that the source of high frequency noise generates; and acoustic damping material that lines the inner surface of the channel.

Inlet silencer

An annular combustor that has angled effusion holes through at least one surface of the combustor liner with the angle of the effusion holes oriented to cause the flow of air through the holes to facilitate swirling of the fuel and air within the combustor. The effusion holes thereby facilitate efficient cooling of the combustor liner combined with superior fuel/air mixing within the combustor.

Growing community of inventors

San Diego, CA, United States of America

Jack V Vitale