US20150078898A1 - Compound Cooling Flow Turbulator for Turbine Component - Google Patents
Compound Cooling Flow Turbulator for Turbine Component Download PDFInfo
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- US20150078898A1 US20150078898A1 US14/546,153 US201414546153A US2015078898A1 US 20150078898 A1 US20150078898 A1 US 20150078898A1 US 201414546153 A US201414546153 A US 201414546153A US 2015078898 A1 US2015078898 A1 US 2015078898A1
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- surface features
- turbine component
- ridges
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
- F01D5/14—Form or construction
- F01D5/18—Hollow blades, i.e. blades with cooling or heating channels or cavities; Heating, heat-insulating or cooling means on blades
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
- F01D5/14—Form or construction
- F01D5/18—Hollow blades, i.e. blades with cooling or heating channels or cavities; Heating, heat-insulating or cooling means on blades
- F01D5/187—Convection cooling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2250/00—Geometry
- F05D2250/10—Two-dimensional
- F05D2250/18—Two-dimensional patterned
- F05D2250/181—Two-dimensional patterned ridged
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2250/00—Geometry
- F05D2250/60—Structure; Surface texture
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2250/00—Geometry
- F05D2250/60—Structure; Surface texture
- F05D2250/61—Structure; Surface texture corrugated
- F05D2250/611—Structure; Surface texture corrugated undulated
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2250/00—Geometry
- F05D2250/70—Shape
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2250/00—Geometry
- F05D2250/70—Shape
- F05D2250/71—Shape curved
- F05D2250/711—Shape curved convex
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2250/00—Geometry
- F05D2250/70—Shape
- F05D2250/71—Shape curved
- F05D2250/712—Shape curved concave
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2260/00—Function
- F05D2260/20—Heat transfer, e.g. cooling
- F05D2260/221—Improvement of heat transfer
- F05D2260/2212—Improvement of heat transfer by creating turbulence
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2260/00—Function
- F05D2260/20—Heat transfer, e.g. cooling
- F05D2260/221—Improvement of heat transfer
- F05D2260/2214—Improvement of heat transfer by increasing the heat transfer surface
- F05D2260/22141—Improvement of heat transfer by increasing the heat transfer surface using fins or ribs
Definitions
- This invention relates to turbulators in cooling channels of turbine components, and particularly in gas turbine airfoils.
- Cooling effectiveness is important in order to minimize thermal stress on these airfoils. Cooling efficiency is important in order to minimize the volume of air diverted from the compressor for cooling.
- serpentine cooling channels with turbulators.
- An example is shown in U.S. Pat. No. 6,533,547.
- the present invention provides improved turbulators with features at multiple scales in combinations that increase surface area, increase boundary layer mixing, and control boundary layer separation.
- FIG. 1 is a sectional view of a prior art turbine blade with serpentine cooling channels and angled ridge turbulators.
- FIG. 2 is a perspective view of part of a component wall, with turbulator ridges at three scales per aspects of the invention.
- FIG. 3 is a transverse sectional view of two turbulator ridges and a valley between them, with smaller ridges.
- FIG. 4 is a transverse sectional view of two turbulator ridges with smaller grooves, and a valley with smaller ridges.
- FIG. 5 is a perspective view of a turbulator ridge with a boundary layer restart gap.
- FIG. 6 is a perspective view of a turbulator ridge with bumps on the top and side surfaces.
- FIG. 7 is a perspective view of a turbulator ridge with bumps only on the side surfaces.
- FIG. 8 is a perspective view of a turbulator ridge with dimples on the top surface and bumps on the side surfaces.
- FIG. 9 is a perspective view of turbulator ridges and valleys with bumps.
- FIG. 10 is a perspective view of turbulator ridges with dimples, and valleys with bumps.
- FIG. 11 is a partial plan view of a cooling surface with a plurality of first ridges and valleys, larger ridges perpendicular to the first ridges, and with dimples and bumps on the first ridges and valleys.
- FIG. 1 is a side sectional view of a prior art turbine blade 20 with a leading edge 22 , a trailing edge 24 , cooling channels 26 , film cooling holes 28 , and coolant exit holes 30 .
- Cooling air 32 enters an inlet channel 34 in the blade dovetail 36 . It exits the film holes 28 and trailing edge exit holes 30 .
- Ridge turbulators 38 , 40 are provided on the inner surfaces of the cooling channels. These turbulators may be oriented obliquely in the channels 26 as shown, and they may be offset on opposed surfaces of the channels 26 .
- the solid lines 38 represent turbulator ridges visible on the far wall in this viewpoint.
- the dashed lines represent offset turbulator ridges on the near wall that are not visible in this view.
- FIG. 2 is a sectional perspective view of part of a component wall 42 having a cooling channel inner surface 44 with turbulator features at three different scales: 1) A plurality of first parallel ridges 46 separated by valleys 48 ; 2) Larger ridges 50 ; and 3) Smaller ridges 52 on each first ridge 46 and in each valley 48 .
- the first ridges 46 may be separated by planar portions of the channel surface 44 rather than by concave valleys 48 .
- the terms “larger” and “smaller” refer to relative scales such that a smaller feature has less than 1 ⁇ 3 of the transverse sectional area of a respective “first” feature, and a larger feature has at least 3 times the sectional area of a respective first feature. For example, if a first ridge has a transverse sectional area of 1 cm 2 , then a respective smaller ridge has a transverse sectional area of less than 1 ⁇ 3 cm 2 .
- transverse sectional area” of a bump or dimple is defined as the area of a projection of the bump or dimple onto a plane normal to the channel surface 44 at the apex of the bump or at the bottom of the dimple.
- convex turbulation feature herein includes ridges 46 , 50 , 51 , and 52 , and bumps 58 .
- FIG. 9 shows a plurality of smaller convex turbulation features 58 on a plurality of first convex turbulation features 46 and on a plurality of first concave turbulation features 48 .
- concave turbulation feature includes valleys 48 , grooves 54 , and dimples 62 .
- FIG. 9 shows a plurality of smaller convex turbulation features 58 on a plurality of first convex turbulation features 46 and on a plurality of first concave turbulation features 48 .
- concave turbulation feature includes valleys 48 , grooves 54 , and dimples 62 .
- FIG. 10 shows a plurality of smaller concave turbulation features 62 on a plurality of first convex turbulation features 46 , and a plurality of smaller convex turbulation features 58 on a plurality of first concave turbulation features 48 .
- Each additional scale of turbulation features increases the convective area of the channel inner surface 44 .
- the surface area is increased by a factor of about 1.57.
- the surfaces of these ridges and valleys are then modified with smaller scale ridges, grooves, bumps, or dimples, the surface area is further increased.
- the first ridges 46 and first valleys 48 increase the surface area by a factor of about 1.57.
- the smaller ridges 52 further increase it by about 1.27 for a combined factor of about 2.
- the ridges and valleys may use cylindrical geometries or non-cylindrical geometries such as sinusoidal, rectangular, or other shapes.
- a “top surface” of a turbulator is a surface distal to the cooling surface to which the turbulator is attached, and is generally parallel to or aligned with the cooling surface.
- the top surface On a convex turbulator with a rectangular cross section, the top surface may be a planar surface 60 , as shown in FIGS. 6-8 .
- the top surface On a convex turbulator with a curved cross section, the top surface is defined as a distal portion of the surface wherein a tangent plane forms an angle “A” of less than 45° relative to a plane 45 of the cooling surface 44 as shown in FIG.
- plane 45 may be considered as the plane of the cooling surface prior to modification by the turbulation features.
- FIG. 3 is an enlarged sectional view of the first ridges 46 , first valleys 48 , and smaller ridges 52 of FIG. 2 .
- FIG. 4 shows first ridges 46 with smaller grooves 54 , and a first valley 48 with smaller ridges 52 .
- the geometry of FIG. 4 provides the same surface area increase as FIG. 3 .
- replacing the smaller ridges 52 on the first ridges 46 with smaller grooves 54 reduces the component mass, and reduces shadowing of the first valleys 48 by the first ridges 46 , allowing coolant to more easily reach the bottoms of the first valleys 48 .
- forming smaller grooves in the valleys 48 may create some coolant stagnation in some embodiments and is not illustrated here.
- forming smaller convex features on first convex features, and/or forming smaller concave features in first concave features reduces crowding of the smaller features, since they extend toward the outside of the sectional curvatures of the first features.
- FIG. 5 shows a smaller ridge 52 with a gap 56 that restarts the boundary layer of the coolant flow.
- gaps may be provided at any scale—on the first ridges 46 , the larger ridges 50 , or the smaller ridges 52 .
- FIG. 6 shows a ridge 51 with smaller bumps 57 on the top surface 60 and sides of the ridge.
- the bumps add surface area and turbulence.
- FIG. 7 shows a ridge 51 with smaller bumps 57 on the sides, but not on the top 60 of the ridge. This geometry provides some additional surface area with less additional turbulence than in FIG. 6 .
- the ridges 51 of FIGS. 6-8 may be any scale.
- the larger ridges 50 of FIG. 2 may have smaller bumps on the sides, and smaller dimples in the top surface in addition to smaller ridges 46 and valleys 48 between the large ridges 50 .
- FIG. 8 shows a ridge 51 with smaller bumps 57 on the sides, and with smaller dimples 61 on the top surface 60 of the ridge.
- the smaller dimples 61 add the same amount of surface area as smaller bumps of the same size, but with less mass. Dimples 61 create a type of turbulence that causes the coolant boundary layer to follow the downstream side of the ridge 51 more closely than does a more laminar flow. Thus, smaller dimples on the top surface 60 of the ridge increase coolant contact with any smaller scale features provided between such ridges 51 .
- the ridges have a tall rectangular sectional shape as shown in FIGS. 6-8 , then providing dimples near the base of the ridge may produce some coolant stagnation in some embodiments. A configuration with bumps on the sides, especially near the base, and dimples elsewhere, avoids this.
- FIG. 9 shows an embodiment of the invention with first ridges 46 and first valleys 48 , both of which are covered with smaller bumps 58 .
- the smaller bumps provide increased surface area and boundary layer mixing.
- FIG. 10 shows an embodiment of the invention with first ridges 46 and first valleys 48 , with smaller dimples 62 on the ridges, and smaller bumps 58 in the valleys. This geometry provides a similar surface increase to that of FIG. 9 . However, replacing the smaller bumps 58 on the small ridges 46 with smaller dimples 62 reduces shadowing of the first valleys 48 by the first ridges 46 .
- the smaller dimples add surface area while reducing mass, and they create a type of turbulence that causes the coolant boundary layer to follow the downstream side of the first ridges 46 more closely than would a more laminar flow:
- the smaller dimples 62 increase coolant contact with the smaller bumps 58 .
- Providing smaller dimples 62 near the bottom of the first valleys 48 may produce some stagnation in some embodiments, and is not illustrated here, although it may be used as an alternative in order to reduce crowding, as previously mentioned.
- FIG. 11 shows an embodiment of the invention with first ridges 46 and first valleys 48 that are perpendicular to the larger ridges 50 . Smaller dimples 62 and smaller bumps 58 are disposed on the first ridges 46 and first valleys 48 respectively. A coolant flow 64 is illustrated.
- the smaller bumps 58 on the first ridges 46 may be replaced with smaller ridges 52 or the smaller bumps 58 in the first valleys 48 may be replaced with smaller ridges 52 .
- the smaller dimples 62 may be replaced with smaller grooves 54 .
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Abstract
Description
- This application is a continuation-in-part of U.S. patent application Ser. No. 12/536,869 (attorney docket 2009P10468US) filed on 6 Aug. 2009 and incorporated by reference herein.
- Development for this invention was supported in part by Contract Number DE-FC26-05NT42644, awarded by the United States Department of Energy. Accordingly the United States Government may have certain rights in this invention.
- This invention relates to turbulators in cooling channels of turbine components, and particularly in gas turbine airfoils.
- Stationary guide vanes and rotating turbine blades in gas turbines often have internal cooling channels. Cooling effectiveness is important in order to minimize thermal stress on these airfoils. Cooling efficiency is important in order to minimize the volume of air diverted from the compressor for cooling.
- One cooling technique uses serpentine cooling channels with turbulators. An example is shown in U.S. Pat. No. 6,533,547. The present invention provides improved turbulators with features at multiple scales in combinations that increase surface area, increase boundary layer mixing, and control boundary layer separation.
- The invention is explained in the following description in view of the drawings that show:
-
FIG. 1 is a sectional view of a prior art turbine blade with serpentine cooling channels and angled ridge turbulators. -
FIG. 2 is a perspective view of part of a component wall, with turbulator ridges at three scales per aspects of the invention. -
FIG. 3 is a transverse sectional view of two turbulator ridges and a valley between them, with smaller ridges. -
FIG. 4 is a transverse sectional view of two turbulator ridges with smaller grooves, and a valley with smaller ridges. -
FIG. 5 is a perspective view of a turbulator ridge with a boundary layer restart gap. -
FIG. 6 is a perspective view of a turbulator ridge with bumps on the top and side surfaces. -
FIG. 7 is a perspective view of a turbulator ridge with bumps only on the side surfaces. -
FIG. 8 is a perspective view of a turbulator ridge with dimples on the top surface and bumps on the side surfaces. -
FIG. 9 is a perspective view of turbulator ridges and valleys with bumps. -
FIG. 10 is a perspective view of turbulator ridges with dimples, and valleys with bumps. -
FIG. 11 is a partial plan view of a cooling surface with a plurality of first ridges and valleys, larger ridges perpendicular to the first ridges, and with dimples and bumps on the first ridges and valleys. -
FIG. 1 is a side sectional view of a priorart turbine blade 20 with a leadingedge 22, atrailing edge 24,cooling channels 26,film cooling holes 28, andcoolant exit holes 30.Cooling air 32 enters aninlet channel 34 in theblade dovetail 36. It exits thefilm holes 28 and trailingedge exit holes 30.Ridge turbulators channels 26 as shown, and they may be offset on opposed surfaces of thechannels 26. Thesolid lines 38 represent turbulator ridges visible on the far wall in this viewpoint. The dashed lines represent offset turbulator ridges on the near wall that are not visible in this view. -
FIG. 2 is a sectional perspective view of part of acomponent wall 42 having a cooling channelinner surface 44 with turbulator features at three different scales: 1) A plurality of firstparallel ridges 46 separated byvalleys 48; 2)Larger ridges 50; and 3)Smaller ridges 52 on eachfirst ridge 46 and in eachvalley 48. Alternately, not shown, thefirst ridges 46 may be separated by planar portions of thechannel surface 44 rather than byconcave valleys 48. - Herein, the terms “larger” and “smaller” refer to relative scales such that a smaller feature has less than ⅓ of the transverse sectional area of a respective “first” feature, and a larger feature has at least 3 times the sectional area of a respective first feature. For example, if a first ridge has a transverse sectional area of 1 cm2, then a respective smaller ridge has a transverse sectional area of less than ⅓ cm2. The term “transverse sectional area” of a bump or dimple is defined as the area of a projection of the bump or dimple onto a plane normal to the
channel surface 44 at the apex of the bump or at the bottom of the dimple. - The term “convex turbulation feature” herein includes
ridges bumps 58. For exampleFIG. 9 shows a plurality of smaller convex turbulation features 58 on a plurality of first convex turbulation features 46 and on a plurality of first concave turbulation features 48. The term “concave turbulation feature” includesvalleys 48,grooves 54, anddimples 62. For exampleFIG. 10 shows a plurality of smaller concave turbulation features 62 on a plurality of first convex turbulation features 46, and a plurality of smaller convex turbulation features 58 on a plurality of first concave turbulation features 48. - Each additional scale of turbulation features increases the convective area of the channel
inner surface 44. For example, if a planar surface is modified with semi-cylindrical ridges separated by tangent semi-cylindrical valleys, the surface area is increased by a factor of about 1.57. If the surfaces of these ridges and valleys are then modified with smaller scale ridges, grooves, bumps, or dimples, the surface area is further increased. In the exemplary configuration ofFIG. 2 , thefirst ridges 46 andfirst valleys 48 increase the surface area by a factor of about 1.57. Thesmaller ridges 52 further increase it by about 1.27 for a combined factor of about 2. The ridges and valleys may use cylindrical geometries or non-cylindrical geometries such as sinusoidal, rectangular, or other shapes. - Smaller features may be described herein as being on a top or side surface of a first feature. A “top surface” of a turbulator is a surface distal to the cooling surface to which the turbulator is attached, and is generally parallel to or aligned with the cooling surface. On a convex turbulator with a rectangular cross section, the top surface may be a
planar surface 60, as shown inFIGS. 6-8 . On a convex turbulator with a curved cross section, the top surface is defined as a distal portion of the surface wherein a tangent plane forms an angle “A” of less than 45° relative to aplane 45 of thecooling surface 44 as shown inFIG. 3 , whereinplane 45 may be considered as the plane of the cooling surface prior to modification by the turbulation features. This distinction between “top” and “side” surfaces is made because there are benefits to providing different types of smaller features on the top and sides of a turbulator, and/or different types of smaller features on the top and between the first turbulators, as is later described. -
FIG. 3 is an enlarged sectional view of thefirst ridges 46,first valleys 48, andsmaller ridges 52 ofFIG. 2 .FIG. 4 showsfirst ridges 46 withsmaller grooves 54, and afirst valley 48 withsmaller ridges 52. The geometry ofFIG. 4 provides the same surface area increase asFIG. 3 . However, replacing thesmaller ridges 52 on thefirst ridges 46 withsmaller grooves 54 reduces the component mass, and reduces shadowing of thefirst valleys 48 by thefirst ridges 46, allowing coolant to more easily reach the bottoms of thefirst valleys 48. - Alternately forming smaller grooves in the
valleys 48 may create some coolant stagnation in some embodiments and is not illustrated here. However, forming smaller convex features on first convex features, and/or forming smaller concave features in first concave features, reduces crowding of the smaller features, since they extend toward the outside of the sectional curvatures of the first features. -
FIG. 5 shows asmaller ridge 52 with agap 56 that restarts the boundary layer of the coolant flow. Such gaps may be provided at any scale—on thefirst ridges 46, thelarger ridges 50, or thesmaller ridges 52. -
FIG. 6 shows aridge 51 withsmaller bumps 57 on thetop surface 60 and sides of the ridge. The bumps add surface area and turbulence.FIG. 7 shows aridge 51 withsmaller bumps 57 on the sides, but not on the top 60 of the ridge. This geometry provides some additional surface area with less additional turbulence than inFIG. 6 . Theridges 51 ofFIGS. 6-8 may be any scale. For example, thelarger ridges 50 ofFIG. 2 may have smaller bumps on the sides, and smaller dimples in the top surface in addition tosmaller ridges 46 andvalleys 48 between thelarge ridges 50. -
FIG. 8 shows aridge 51 withsmaller bumps 57 on the sides, and withsmaller dimples 61 on thetop surface 60 of the ridge. The smaller dimples 61 add the same amount of surface area as smaller bumps of the same size, but with less mass.Dimples 61 create a type of turbulence that causes the coolant boundary layer to follow the downstream side of theridge 51 more closely than does a more laminar flow. Thus, smaller dimples on thetop surface 60 of the ridge increase coolant contact with any smaller scale features provided betweensuch ridges 51. If the ridges have a tall rectangular sectional shape as shown inFIGS. 6-8 , then providing dimples near the base of the ridge may produce some coolant stagnation in some embodiments. A configuration with bumps on the sides, especially near the base, and dimples elsewhere, avoids this. -
FIG. 9 shows an embodiment of the invention withfirst ridges 46 andfirst valleys 48, both of which are covered withsmaller bumps 58. The smaller bumps provide increased surface area and boundary layer mixing.FIG. 10 shows an embodiment of the invention withfirst ridges 46 andfirst valleys 48, withsmaller dimples 62 on the ridges, andsmaller bumps 58 in the valleys. This geometry provides a similar surface increase to that ofFIG. 9 . However, replacing thesmaller bumps 58 on thesmall ridges 46 withsmaller dimples 62 reduces shadowing of thefirst valleys 48 by thefirst ridges 46. The smaller dimples add surface area while reducing mass, and they create a type of turbulence that causes the coolant boundary layer to follow the downstream side of thefirst ridges 46 more closely than would a more laminar flow: Thus, thesmaller dimples 62 increase coolant contact with the smaller bumps 58. Providingsmaller dimples 62 near the bottom of thefirst valleys 48 may produce some stagnation in some embodiments, and is not illustrated here, although it may be used as an alternative in order to reduce crowding, as previously mentioned. -
FIG. 11 shows an embodiment of the invention withfirst ridges 46 andfirst valleys 48 that are perpendicular to thelarger ridges 50. Smaller dimples 62 andsmaller bumps 58 are disposed on thefirst ridges 46 andfirst valleys 48 respectively. Acoolant flow 64 is illustrated. - Other combinations of multi-scale turbulation features are possible. For example in
FIG. 9 , thesmaller bumps 58 on thefirst ridges 46 may be replaced withsmaller ridges 52 or thesmaller bumps 58 in thefirst valleys 48 may be replaced withsmaller ridges 52. InFIG. 10 , thesmaller dimples 62 may be replaced withsmaller grooves 54. - While various embodiments of the present invention have been shown and described herein, it will be obvious that such embodiments are provided by way of example only. Numerous variations, changes and substitutions may be made without departing from the invention herein. Accordingly, it is intended that the invention be limited only by the spirit and scope of the appended claims.
Claims (30)
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US14/546,153 US20150078898A1 (en) | 2009-08-06 | 2014-11-18 | Compound Cooling Flow Turbulator for Turbine Component |
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US12/536,869 US20110033311A1 (en) | 2009-08-06 | 2009-08-06 | Turbine Airfoil Cooling System with Pin Fin Cooling Chambers |
US12/884,464 US8894367B2 (en) | 2009-08-06 | 2010-09-17 | Compound cooling flow turbulator for turbine component |
US14/546,153 US20150078898A1 (en) | 2009-08-06 | 2014-11-18 | Compound Cooling Flow Turbulator for Turbine Component |
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US12/884,464 Continuation US8894367B2 (en) | 2009-08-06 | 2010-09-17 | Compound cooling flow turbulator for turbine component |
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US12/884,464 Active 2032-08-14 US8894367B2 (en) | 2009-08-06 | 2010-09-17 | Compound cooling flow turbulator for turbine component |
US14/546,153 Abandoned US20150078898A1 (en) | 2009-08-06 | 2014-11-18 | Compound Cooling Flow Turbulator for Turbine Component |
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US8628298B1 (en) * | 2011-07-22 | 2014-01-14 | Florida Turbine Technologies, Inc. | Turbine rotor blade with serpentine cooling |
EP2602439A1 (en) * | 2011-11-21 | 2013-06-12 | Siemens Aktiengesellschaft | Coolable hot gas component for a gas turbine |
CN104204411B (en) * | 2012-03-22 | 2016-09-28 | 通用电器技术有限公司 | The wall of cooling |
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US8951004B2 (en) * | 2012-10-23 | 2015-02-10 | Siemens Aktiengesellschaft | Cooling arrangement for a gas turbine component |
WO2014175937A2 (en) * | 2013-02-05 | 2014-10-30 | United Technologies Corporation | Gas turbine engine component having curved turbulator |
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Also Published As
Publication number | Publication date |
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US8894367B2 (en) | 2014-11-25 |
WO2012036965A1 (en) | 2012-03-22 |
EP3399150B1 (en) | 2024-06-12 |
EP2616642B1 (en) | 2018-05-16 |
US20110033312A1 (en) | 2011-02-10 |
EP2616642A1 (en) | 2013-07-24 |
EP3399150A1 (en) | 2018-11-07 |
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