Publication Date: 2017-Jun-23
The IP.com Prior Art Database
 Turbine engines are driven by a flow of air and combusted gases passing through
the engine onto a multitude of rotating turbine blades.
 Labyrinth seals can be provided throughout the turbine engine between areas of
differing pressures. Seals can help to prevent wear and rubbing between proximate stationary
and rotating parts.
 In the drawings:
 FIG. 1 is a schematic cross-sectional diagram of a turbine engine for an aircraft with
a reverse flow combustor.
 FIG. 2 is an enlarged cross-sectional view an air blown seal system for the engine
from FIG. 1 near an exhaust section of the turbine engine.
 FIG. 3 is an enlarged cross-sectional view of the air blown seal system from FIG. 2.
 FIG. 4 is an enlarged cross-sectional view of sealing teeth for the air blown seal
system from FIG. 2.
 Aspects of the disclosure described herein are directed to an air blown seal system
for a turbine engine. For purposes of illustration, the present disclosure will be described with
respect to a free turbine engine. It will be understood, however, that aspects of the disclosure
described herein are not so limited and that air blown seal system as described herein can be
implemented in other turbine engines, including but not limited to turbojet, turboprop,
turboshaft, and turbofan engines. Aspects of the disclosure discussed herein may have
general applicability within non-aircraft engines having an air blown seal system such as
other mobile applications and non-mobile industrial, commercial, and residential
 As used herein, the term “forward” or “upstream” refers to moving in a direction
toward the engine inlet, or a component being relatively closer to the engine inlet as
compared to another component. The term “aft” or “downstream” used in conjunction with
“forward” or “upstream” refers to a direction toward the rear or outlet of the engine or being
relatively closer to the engine outlet as compared to another component. Additionally, as
used herein, the terms “radial” or “radially” refer to a dimension extending between a center
longitudinal axis of the engine and an outer engine circumference. Furthermore, as used
herein, the term “set” or a “set” of elements can be any number of elements, including only
 All directional references (e.g., radial, axial, proximal, distal, upper, lower, upward,
downward, left, right, lateral, front, back, top, bottom, above, below, vertical, horizontal,
clockwise, counterclockwise, upstream, downstream, forward, aft, etc.) are only used for
identification purposes to aid the reader’s understanding of the present disclosure, and do not
create limitations, particularly as to the position, orientation, or use of aspects of the
disclosure described herein. Connection references (e.g., attached, coupled, connected, and
joined) are to be construed broadly and can include intermediate members between a