Transition duct for gas turbine engine
View Patent ↗A transition duct having an inlet opening and an outlet opening and a body portion extending between the inlet and outlet openings at respective inlet and outlet ends. The inlet opening defines a generally circular cross-section for the body portion and has a geometric center, and the outlet opening defines a generally rectangular arc-like cross-section. The body portion has an internal profile substantially in accordance with coordinate values X, Y and Z at an angle θ, as set forth in Table 1, where each of the X, Y and Z coordinate values are taken at a sweep angle θ passing through the section origin and measured from a first plane defined by the inlet end and increasing toward a second plane defined by the outlet end.
1. A transition duct having an inlet opening and an outlet opening and a body portion extending between said inlet and outlet openings at respective inlet and outlet ends, said inlet opening defining a generally circular cross-section for said body portion and having a geometric center, said body portion having an internal profile substantially in accordance with coordinate values X, Y and Z at sections defined by a respective angle θ, as set forth in Table 1, where each of said X, Y and Z coordinates are taken at a sweep angle θ passing through said section origin and measured from a first plane defined by said inlet end and increasing toward a second plane defined by said outlet end, said first plane and said section planes intersecting at an angle origin line about which said angle θ is measured, said X and Y coordinate values are determined relative to a section origin at a substantially central geometric location within each respective section, and said Z coordinate values are measured along a Z-axis extending perpendicular to said first plane, and having an origin at the center of said generally circular inlet opening and increasing toward said outlet end.
2. The transition duct of claim 1 , wherein said internal profile may be provided within an envelope of ±6.350 mm normal to any surface with said coordinate values X, Y and Z and said angles θ.
3. The transition duct of claim 1 , wherein the distance between said angle origin line about which said angle θ is measured and said inlet origin at the center of said generally circular inlet opening is approximately 1223 mm.
4. The transition duct of claim 1 , wherein said coordinates X, Y and Z represent unitless scaled values.
5. A transition duct having an inlet opening and an outlet opening and a body portion extending between said inlet and outlet openings at respective inlet and outlet ends, said inlet opening defining a generally circular cross-section for said body portion and having a geometric center, said body portion having an internal profile including first, second, third and fourth profile sections defining respective geometric centers comprising section origins, said first, second, third and fourth profile sections located approximately at angles Θ of 1.0°, 10.0°, 21.0° and 30.0°, respectively, taken at a sweep angle Θ passing through a respective one of said section origins and measured from a first plane defined by said inlet end and increasing toward a second plane defined by said outlet end, said first plane and said section planes intersecting at an angle origin line about which said angle Θ is measured, each said section defining a Cartesian X Y coordinate origin located at said geometric center within each said section with corresponding quadrants determined relative to a respective section origin within each respective section, each said section defining quadrants extending from said Cartesian X Y coordinate origin for each section, said quadrants for each section comprising:
a first quadrant corresponding to positive X and positive Y values relative to the Cartesian X Y coordinate origin;
a second quadrant corresponding to negative X and positive Y values relative to the Cartesian X Y coordinate origin;
a third quadrant corresponding to negative X and negative Y values relative to the Cartesian X Y coordinate origin; and
a fourth quadrant corresponding to positive X and negative Y values relative to the Cartesian X Y coordinate origin;
wherein said first section comprises a generally circular cross-section; said second section comprises a first side extending from the third quadrant to the second quadrant, a second side extending from the fourth quadrant to the first quadrant, an outer side extending between said first and second quadrants and curved concave inwardly toward the coordinate origin, an inner side extending between said third and fourth quadrants and curved concave inwardly toward the coordinate origin, said first and second sides extending in diverging relation from said inner side toward said outer side;
said third section comprises a first substantially linear side extending from the third quadrant to the second quadrant, a second substantially linear side extending from the fourth quadrant to the first quadrant, at least one of the first and second substantially linear sides having a linear portion, an outer side extending between said first and second quadrants and curved concave inwardly toward the coordinate origin, an inner side extending between said third and fourth quadrants and curved concave inwardly toward the coordinate origin, said first and second sides extending in diverging relation from said inner side toward said outer side; and
said fourth section comprises a first substantially linear side extending from the third quadrant to the second quadrant, a second substantially linear side extending from the fourth quadrant to the first quadrant, an outer side extending between said first and second quadrants and curved concave inwardly toward the coordinate origin, an inner side extending between said third and fourth quadrants and curved concave outwardly away from the coordinate origin, said first and second sides extending in diverging relation from said inner toward said outer side.
6. The transition duct of claim 5 , wherein said second profile section is substantially in accordance with coordinate values X, Y and Z as follows:
θ
X
Y
Z
10.0
0.000
137.813
191.359
10.0
27.411
135.748
191.723
10.0
54.217
129.733
192.783
10.0
79.932
120.143
194.474
10.0
104.216
107.434
196.715
10.0
126.863
92.065
199.425
10.0
147.770
74.463
202.529
10.0
166.512
54.675
206.018
10.0
177.490
30.042
210.362
10.0
178.983
3.031
215.124
10.0
177.868
−24.041
219.898
10.0
174.883
−50.974
224.647
10.0
170.025
−77.642
229.349
10.0
163.264
−103.904
233.980
10.0
150.655
−127.815
238.196
10.0
130.213
−145.740
241.357
10.0
106.213
−158.965
243.689
10.0
80.849
−169.438
245.535
10.0
54.457
−177.055
246.878
10.0
27.363
−181.705
247.698
10.0
−0.092
−183.273
247.975
10.0
−27.537
−181.685
247.695
10.0
−54.619
−177.018
246.872
10.0
−80.997
−169.386
245.526
10.0
−106.346
−158.902
243.677
10.0
−130.330
−145.666
241.344
10.0
−150.734
−127.715
238.178
10.0
−163.298
−103.791
233.960
10.0
−170.049
−77.535
229.330
10.0
−174.898
−50.875
224.630
10.0
−177.875
−23.950
219.882
10.0
−178.983
3.113
215.110
10.0
−177.475
30.114
210.349
10.0
−166.474
54.727
206.009
10.0
−147.729
74.500
202.522
10.0
−126.826
92.093
199.420
10.0
−104.184
107.453
196.712
10.0
−79.906
120.154
194.472
10.0
−54.199
129.738
192.783
10.0
−27.401
135.750
191.723
where said X and Y coordinate values are determined relative to said Cartesian X Y origin, and said Z coordinate values are measured along a Z-axis extending perpendicular to said first plane, and having an origin at the center of said generally circular inlet opening and increasing toward said outlet end.
7. The transition duct of claim 6 , wherein said internal profile may be provided within an envelope of ±6.350 mm normal to any surface with said coordinate values X, Y and Z.
8. The transition duct of claim 6 , wherein said coordinates X, Y and Z represent unitless scaled values.
9. The transition duct of claim 5 , wherein said third profile section is substantially in accordance with coordinate values X, Y and Z as follows:
θ
X
Y
Z
21.0
0.000
49.344
450.548
21.0
25.439
48.416
450.904
21.0
50.731
45.704
451.946
21.0
75.759
41.344
453.619
21.0
100.439
35.502
455.861
21.0
124.720
28.351
458.606
21.0
148.584
20.062
461.788
21.0
171.580
10.011
465.647
21.0
184.387
−9.886
473.285
21.0
182.474
−33.498
482.348
21.0
178.774
−57.018
491.377
21.0
174.619
−80.473
500.380
21.0
169.984
−103.848
509.353
21.0
164.741
−127.108
518.282
21.0
150.617
−146.420
525.695
21.0
126.933
−154.035
528.618
21.0
101.586
−156.315
529.493
21.0
76.196
−158.126
530.188
21.0
50.772
−159.453
530.698
21.0
25.323
−160.273
531.013
21.0
−0.139
−160.554
531.120
21.0
−25.587
−160.267
531.010
21.0
−51.022
−159.442
530.694
21.0
−76.432
−158.111
530.183
21.0
−101.808
−156.297
529.487
21.0
−127.140
−154.015
528.610
21.0
−150.771
−146.309
525.652
21.0
−164.791
−126.946
518.220
21.0
−170.016
−103.695
509.294
21.0
−174.646
−80.332
500.326
21.0
−178.796
−56.890
491.328
21.0
−182.491
−33.382
482.304
21.0
−184.369
−9.784
473.245
21.0
−171.502
10.066
465.626
21.0
−148.507
20.091
461.777
21.0
−124.655
28.373
458.598
21.0
−100.385
35.517
455.856
21.0
−75.718
41.353
453.616
21.0
−50.704
45.707
451.944
21.0
−25.425
48.417
450.904
where said X and Y coordinate values are determined relative to said Cartesian X Y origin, and said Z coordinate values are measured along a Z-axis extending perpendicular to said first plane, and having an origin at the center of said generally circular inlet opening and increasing toward said outlet end.
10. The transition duct of claim 9 , wherein said internal profile may be provided within an envelope of ±6.350 mm normal to any surface with said coordinate values X, Y and Z.
11. The transition duct of claim 9 , wherein said coordinates X, Y and Z represent unitless scaled values.
12. A transition duct having an inlet opening and an outlet opening and a body portion extending between said inlet and outlet openings at respective inlet and outlet ends, said inlet opening defining a generally circular cross-section for said body portion and having a geometric center, said body portion having an internal profile including first, second, third and fourth profile sections substantially in accordance with coordinate values X, Y and Z located at angles θ of 1.0°, 10.0°, 21.0° and 30.0°, respectively, as follows:
θ
X
Y
Z
1.0
0.000
174.094
18.310
1.0
27.361
171.930
18.348
1.0
54.047
165.510
18.460
1.0
79.411
155.021
18.643
1.0
102.856
140.749
18.892
1.0
123.849
123.068
19.200
1.0
141.929
102.418
19.561
1.0
156.693
79.282
19.965
1.0
167.221
53.951
20.407
1.0
172.981
27.122
20.875
1.0
174.705
−0.271
21.353
1.0
172.481
−27.629
21.831
1.0
166.351
−54.383
22.298
1.0
156.392
−79.957
22.744
1.0
142.206
−103.440
23.154
1.0
124.128
−124.084
23.515
1.0
103.029
−141.638
23.821
1.0
79.494
−155.761
24.067
1.0
54.074
−166.115
24.248
1.0
27.365
−172.441
24.359
1.0
0.000
−174.571
24.396
1.0
−27.365
−172.441
24.359
1.0
−54.074
−166.115
24.248
1.0
−79.494
−155.761
24.067
1.0
−103.029
−141.638
23.821
1.0
−124.128
−124.084
23.515
1.0
−142.206
−103.440
23.154
1.0
−156.392
−79.957
22.744
1.0
−166.351
−54.383
22.298
1.0
−172.481
−27.629
21.831
1.0
−174.705
−0.271
21.353
1.0
−172.981
27.122
20.875
1.0
−167.221
53.951
20.407
1.0
−156.693
79.282
19.965
1.0
−141.929
102.418
19.561
1.0
−123.849
123.068
19.200
1.0
−102.856
140.749
18.892
1.0
−79.411
155.021
18.643
1.0
−54.047
165.510
18.460
1.0
−27.361
171.930
18.348
10.0
0.000
137.813
191.359
10.0
27.411
135.748
191.723
10.0
54.217
129.733
192.783
10.0
79.932
120.143
194.474
10.0
104.216
107.434
196.715
10.0
126.863
92.065
199.425
10.0
147.770
74.463
202.529
10.0
166.512
54.675
206.018
10.0
177.490
30.042
210.362
10.0
178.983
3.031
215.124
10.0
177.868
−24.041
219.898
10.0
174.883
−50.974
224.647
10.0
170.025
−77.642
229.349
10.0
163.264
−103.904
233.980
10.0
150.655
−127.815
238.196
10.0
130.213
−145.740
241.357
10.0
106.213
−158.965
243.689
10.0
80.849
−169.438
245.535
10.0
54.457
−177.055
246.878
10.0
27.363
−181.705
247.698
10.0
−0.092
−183.273
247.975
10.0
−27.537
−181.685
247.695
10.0
−54.619
−177.018
246.872
10.0
−80.997
−169.386
245.526
10.0
−106.346
−158.902
243.677
10.0
−130.330
−145.666
241.344
10.0
−150.734
−127.715
238.178
10.0
−163.298
−103.791
233.960
10.0
−170.049
−77.535
229.330
10.0
−174.898
−50.875
224.630
10.0
−177.875
−23.950
219.882
10.0
−178.983
3.113
215.110
10.0
−177.475
30.114
210.349
10.0
−166.474
54.727
206.009
10.0
−147.729
74.500
202.522
10.0
−126.826
92.093
199.420
10.0
−104.184
107.453
196.712
10.0
−79.906
120.154
194.472
10.0
−54.199
129.738
192.783
10.0
−27.401
135.750
191.723
21.0
0.000
49.344
450.548
21.0
25.439
48.416
450.904
21.0
50.731
45.704
451.946
21.0
75.759
41.344
453.619
21.0
100.439
35.502
455.861
21.0
124.720
28.351
458.606
21.0
148.584
20.062
461.788
21.0
171.580
10.011
465.647
21.0
184.387
−9.886
473.285
21.0
182.474
−33.498
482.348
21.0
178.774
−57.018
491.377
21.0
174.619
−80.473
500.380
21.0
169.984
−103.848
509.353
21.0
164.741
−127.108
518.282
21.0
150.617
−146.420
525.695
21.0
126.933
−154.035
528.618
21.0
101.586
−156.315
529.493
21.0
76.196
−158.126
530.188
21.0
50.772
−159.453
530.698
21.0
25.323
−160.273
531.013
21.0
−0.139
−160.554
531.120
21.0
−25.587
−160.267
531.010
21.0
−51.022
−159.442
530.694
21.0
−76.432
−158.111
530.183
21.0
−101.808
−156.297
529.487
21.0
−127.140
−154.015
528.610
21.0
−150.771
−146.309
525.652
21.0
−164.791
−126.946
518.220
21.0
−170.016
−103.695
509.294
21.0
−174.646
−80.332
500.326
21.0
−178.796
−56.890
491.328
21.0
−182.491
−33.382
482.304
21.0
−184.369
−9.784
473.245
21.0
−171.502
10.066
465.626
21.0
−148.507
20.091
461.777
21.0
−124.655
28.373
458.598
21.0
−100.385
35.517
455.856
21.0
−75.718
41.353
453.616
21.0
−50.704
45.707
451.944
21.0
−25.425
48.417
450.904
30.0
0.000
51.170
676.592
30.0
24.441
50.916
676.739
30.0
48.868
50.153
677.179
30.0
73.267
48.882
677.913
30.0
97.623
47.105
678.939
30.0
121.923
44.821
680.258
30.0
146.153
42.034
681.867
30.0
170.198
38.368
683.983
30.0
185.821
23.186
692.749
30.0
183.411
2.319
704.797
30.0
178.648
−18.444
716.784
30.0
173.880
−39.206
728.771
30.0
169.107
−59.967
740.757
30.0
163.421
−80.501
752.612
30.0
145.485
−94.016
760.415
30.0
121.318
−93.624
760.189
30.0
97.066
−90.982
758.664
30.0
72.739
−88.929
757.479
30.0
48.355
−87.466
756.634
30.0
23.933
−86.592
756.129
30.0
−0.506
−86.309
755.966
30.0
−24.895
−86.616
756.143
30.0
−49.265
−87.510
756.659
30.0
−73.597
−88.992
757.515
30.0
−97.872
−91.061
758.709
30.0
−122.070
−93.716
760.242
30.0
−146.158
−93.822
760.303
30.0
−163.699
−79.984
752.314
30.0
−169.225
−59.451
740.459
30.0
−173.989
−38.733
728.498
30.0
−178.747
−18.014
716.536
30.0
−183.500
2.706
704.573
30.0
−185.722
23.526
692.552
30.0
−169.864
38.473
683.923
30.0
−145.852
42.071
681.845
30.0
−121.672
44.848
680.242
30.0
−97.421
47.122
678.930
30.0
−73.115
48.892
677.908
30.0
−48.767
50.157
677.177
30.0
−24.390
50.917
676.738
where each of said X, Y and Z coordinates are taken at a sweep angle θ passing through said section origin and measured from a first plane defined by said inlet end and increasing toward a second plane defined by said outlet end, said first plane and said section planes intersecting at an angle origin line about which said angle θ is measured, said X and Y coordinate values are determined relative to the section origin at a substantially central geometric location within each respective section, and said Z coordinate values are measured along a Z-axis extending perpendicular to said first plane, and having an origin at the center of said generally circular inlet opening and increasing toward said outlet end.
13. The transition duct of claim 12 , wherein said internal profile may be provided within an envelope of ±6.350 mm normal to any surface with said coordinate values X, Y and Z and said angles θ.
14. The transition duct of claim 12 , wherein the distance between said angle origin line about which said angle θ is measured and said inlet origin at the center of said generally circular inlet opening is approximately 1223 mm.
15. The transition duct of claim 12 , wherein said coordinates X, Y and Z represent unitless scaled values.
16. The transition duct of claim 5 , wherein said outer side of said third section comprises less curvature along a length of said outer side between said first and second sides of said third section than a curvature of said outer side of said second section.
17. The transition duct of claim 16 , wherein said inner side of said third section comprises less curvature along a length of said inner side between said first and second sides of said third section than a curvature of said inner side of said second section.
18. The transition duct of claim 5 , wherein said inner and outer sides of said third section are joined to said first and second sides of said third section at respective corners, each of said corners defining a radius that is less than a radius of each of said sides of said third section to define said third section as an expanded rectangle.