Siemens Aktiengesellschaft

Siemens Energy, Inc.

Siemens Energy Global Gmbh & Co. Kg

Gm Salam Azad

Ching-Pang Lee

Kok-Mun Tham

Nicholas F Martin, Jr

Vincent Paul Laurello

Zhihong Gao

David G Sansom

Neil Hitchman

Manjit Shivanand

Ramesh Subramanian

Jae Y Um

Barrry L Allmon

Daniel Joo

Gary Brian Merrill

Eric Joseph Schroeder

Cora Schillig

Mrinal Munshi

Tobias Buchal

Abdullatif M Chehab

Sin Chien Siw

Christopher K Rawlings

Farzad Taremi

Anthony J Malandra

Erik Johnson

Dimitrios Zois

Jonathan E Shipper

Andrew Lohaus

Shantanu P Mhetras

Caleb Myers

Gerald L Hillier

Carmen Andrew Scribner

Ralph W Matthews

Horia Flitan

Alan A Thrift

Johan K Westin

Runzhong Chen

A turbine vane in a gas turbine engine includes an inner platform, an outer platform, and a vane airfoil positioned therebetween. The vane airfoil includes a first cooling passage extending between the outer platform and the inner platform, and a second cooling passage extending between the outer platform and the inner platform. The second cooling passage is arranged downstream of the first cooling passage with respect to a flow direction. The turbine vane includes a jumper tube disposed between the second cooling passage and the inner platform. The jumper tube includes an inlet, an outlet, and a tube wall enclosing a hollow interior. The inlet is positioned a distance within the second cooling passage. The outlet is positioned at least partially through an aperture of the inner platform.

Turbine vane in gas turbine engine

A shroud assembly for a turbine engine includes a seal for sealing a gap between a first mate face of a first shroud segment and a second mate face of a circumferentially adjacent second shroud segment. The seal is received in first and second slots formed respectively on the first and second mate faces. The first and second slots extend axially between a leading edge and a trailing edge of the respective shroud segment. The first slot is open at the leading and the trailing edges while the second slot is open at the leading edge and closed at the trailing edge. The seal has axially extending first and second sides which are receivable respectively within the first and second slots. The seal has an axial length substantially equal to tan axial length of the shroud segments and has a cutout on the second side at a trailing edge end of the seal.

Sealing arrangement between turbine shroud segments

Turbine and compressor casing/housing abradable component embodiments for turbine engines, have abradable surfaces with asymmetric forward and aft ridge surface area density. The forward ridges have greater surface area density than the aft ridges to compensate for greater ridge erosion in the forward zone during engine operation and reduce blade tip wear in the aft zone. Some abradable component embodiments increase forward zone ridge surface area density by incorporating wider ridges than those in the aft zone.

Turbine abradable layer with compound angle, asymmetric surface area ridge and groove pattern

A cooling system () positioned within a turbine airfoil () and having film cooling channels () positioned within inner and outer endwalls () of the turbine airfoil (), with cooling fluids supplied to the cooling channels () other than from an aft cooling chamber () to prevent blockages from developing within the film cooling channels () from debris that typically collects with the aft cooling chamber () during steady state operation of the turbine engine is disclosed. The cooling system () may include one or more midchord cooling channels () extending from a midchord cooling chamber () and including an outlet () positioned closer to a downstream edge () of the inner endwall () than an upstream wall () forming the aft cooling chamber (). The midchord cooling channel, thus, may cool aspects of the inner endwall () radially outward of the aft cooling chamber () without receiving cooling fluid from aft cooling chamber (), thereby eliminating the possibility of blockages from debris in the aft cooling chamber ().

Cooled turbine vane platform comprising forward, midchord and aft cooling chambers in the platform

Gas turbine engine blade squealer tips incorporate cooling slots formed in the suction side rail downstream of the leading edge for directing cooling gas flow along an inside edge of the squealer tip pressure side rail. Some embodiments incorporate a tip fin on the suction side rail proximal a cooling slot. Segmented suction side rail embodiments abrade opposing turbine casing abradable surfaces prior to potential contact with the pressure side rail, reducing likelihood of pressure side rail friction heating. During turbine engine operation cooler pressure side rails reduce likelihood of squealer tip erosion.

Segmented turbine blade squealer tip and cooling method

A turbine airfoil assembly for installation in a gas turbine engine. The airfoil assembly includes an endwall and an airfoil extending radially outwardly from the endwall. The airfoil includes pressure and suction sidewalls defining chordally spaced apart leading and trailing edges of the airfoil. An airfoil mean line is defined located centrally between the pressure and suction sidewalls. An angle between the mean line and a line parallel to the engine axis at the leading and trailing edges defines gas flow entry angles, &#x3b1;, and exit angles, &#x3b2;. Airfoil inlet and exit angles are substantially in accordance with inlet angle values, &#x3b1;, and exit angle values, &#x3b2;, set forth in one of Tables 1, 2, 3, and 4.

Turbine airfoil with optimized airfoil element angles

A component in a gas turbine engine includes an airfoil extending radially outwardly from a platform associated with the airfoil. The airfoil includes opposed pressure and suction sidewalls, which converge at a first location defined at a leading edge of the airfoil and at a second location defined at a trailing edge of the airfoil opposed from the leading edge. The component includes a built-up surface adjacent to the leading edge at an intersection between the pressure sidewall and the platform, and at least one cooling passage at least partially within the built-up surface at the intersection between the pressure sidewall and the platform. The at least one cooling passage is in fluid communication with a main cooling channel within the airfoil and has an outlet at the platform for providing cooling fluid directly from the main cooling channel to the platform.

Airfoil having built-up surface with embedded cooling passage

A seal assembly between a hot gas path and a disc cavity in a turbine engine includes a non-rotatable vane assembly including a row of vanes and an inner shroud, a rotatable blade assembly axially adjacent to the vane assembly and including a row of blades and a turbine disc that forms a part of a turbine rotor, and an annular wing member located radially between the hot gas path and the disc cavity. The wing member extends generally axially from the blade assembly toward the vane assembly and includes a plurality of circumferentially spaced apart flow passages extending therethrough from a radially inner surface thereof to a radially outer surface thereof. The flow passages each include a portion that is curved as the passage extends radially outwardly to effect a scooping of cooling fluid from the disc cavity into the flow passages and toward the hot gas path.

Outer rim seal assembly in a turbine engine

Turbine and compressor casing abradable component embodiments for turbine engines, with composite grooves and vertically projecting asymmetric non-parallel walls or trapezoidal cross section ridges that reduce, redirect and/or block blade tip airflow leakage downstream into the grooves rather than from turbine blade airfoil high to low pressure sides. In some embodiments at least one angularly oriented first groove formed in the ridge plateau is adapted for angular orientation upstream a turbine blade rotation direction to resist blade tip airflow leakage and the ridges are separated by second grooves that are skewed relative to the respective ridge plateaus and the substrate that are also adapted for orientation upstream the turbine blade rotation direction to resist blade tip airflow leakage.

Turbine abradable layer with asymmetric ridges or grooves

Turbine and compressor casing abradable component embodiments for turbine engines, with zig-zag pattern abradable surface ridges and grooves. Some embodiments include distinct forward upstream and aft downstream composite multi orientation groove and vertically projecting ridges planform patterns, to reduce, redirect and/or block blade tip airflow leakage downstream into the grooves rather than from turbine blade airfoil high to low pressure sides. Ridge or rib embodiments have first lower and second upper wear zones. The lower zone optimizes engine airflow characteristics while the upper zone is optimized to minimize blade tip gap and wear by being more easily abradable than the lower zone.

Turbine abradable layer with zig zag groove pattern

Turbine and compressor casing abradable component embodiments for turbine engines, with composite grooves and vertically projecting alternating rows of first and second height ridges in planform patterns, to reduce, redirect and/or block blade tip airflow leakage downstream into the grooves rather than from turbine blade airfoil high to low pressure sides. The first ridges have a first ridge height greater than that of the second ridges. These ridge or rib embodiments have first lower and second upper wear zones. The lower zone, at and below the second ridge height, optimizes engine airflow characteristics, while the upper zone, between tips of the second and first ridges, is optimized to minimize blade tip gap and wear by being more easily abradable than the lower zone.

Turbine abradable layer with progressive wear zone multi level ridge arrays

A gas turbine having rotor discs (), a disc cavity () and a stator stage () extending to the disc cavity (). Seal housing flanges () extend from a seal housing () of the stator stage (). Rotor flanges () extend from a rotor disk (-). An inner rotor flange () and first seal housing flange () are inward from a second seal housing flange (). One rotor flange () is outward from the second seal housing flange (). The inner rotor flange () and first seal housing flange () extend toward one another to limit movement of main gas flow (). An inlet () injects air () between the outward rotor flange () and second seal housing flange ().

Flow discourager integrated turbine inter-stage U-ring

An investment casting method for a cast ceramic core (), including an airfoil portion () shaped to define an inner surface () of an airfoil () of a vane segment () and an integral shell portion () having a backside-shaping surface () shaped to define a backside surface () of a shroud () of the vane segment. The backside-shaping surface has a higher elevation () and a lower elevation (). The higher elevation is set apart from a nearest point () on the airfoil portion by the lower elevation. The airfoil portion and the shell portion are cast as a monolithic body during a single casting pour.

Investment casting method for gas turbine engine vane segment

An airfoil in a gas turbine engine includes an outer wall, a cooling fluid cavity, and a cooling system. The outer wall has a leading edge, a trailing edge, a pressure side, a suction side, and radially inner and outer ends. The cooling fluid cavity is defined in the outer wall, extends generally radially between the inner and outer ends of the outer wall, and receives cooling fluid for cooling the outer wall. The cooling system receives cooling fluid from the cooling fluid cavity for cooling the trailing edge portion of the outer wall and includes a cooling fluid chamber defined by opposing first and second sidewalls that include respective alternating angled sections that provide the cooling fluid chamber with a zigzag shape.

Cooling system including wavy cooling chamber in a trailing edge portion of an airfoil assembly

A seal assembly between a hot gas path and a disc cavity in a turbine engine includes a non-rotatable vane assembly including a row of vanes and an inner shroud, a rotatable blade assembly adjacent to the vane assembly and including a row of blades and a turbine disc that forms a part of a turbine rotor, and an annular wing member located radially between the hot gas path and the disc cavity. The wing member extends generally axially from the blade assembly toward the vane assembly and includes a plurality of circumferentially spaced apart flow passages extending therethrough from a radially inner surface thereof to a radially outer surface thereof. The flow passages effect a pumping of cooling fluid from the disc cavity toward the hot gas path during operation of the engine.

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Oviedo, FL, United States of America

Gm Salam Azad