An Analysis of the Stress Relief Process of Drum Rotors John Moran Conduction Heat Transfer...
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![Page 1: An Analysis of the Stress Relief Process of Drum Rotors John Moran Conduction Heat Transfer MEAE6630H01 April 13, 2000.](https://reader036.fdocuments.us/reader036/viewer/2022062313/56649d565503460f94a3454b/html5/thumbnails/1.jpg)
An Analysis of the Stress Relief Process of Drum Rotors
John Moran
Conduction Heat Transfer
MEAE6630H01
April 13, 2000
![Page 2: An Analysis of the Stress Relief Process of Drum Rotors John Moran Conduction Heat Transfer MEAE6630H01 April 13, 2000.](https://reader036.fdocuments.us/reader036/viewer/2022062313/56649d565503460f94a3454b/html5/thumbnails/2.jpg)
Process
• Rotors EB welded into drums
• Drums stress relieved in vacuum furnace
• Heat to 1100 F, hold for 2hrs
• Static cool
• Free convection cool
• Forced convection cool
![Page 3: An Analysis of the Stress Relief Process of Drum Rotors John Moran Conduction Heat Transfer MEAE6630H01 April 13, 2000.](https://reader036.fdocuments.us/reader036/viewer/2022062313/56649d565503460f94a3454b/html5/thumbnails/3.jpg)
Approach
• Collect TC data
• 2D MARC finite element model
• Assume a flux function based on known behavior of process and match to TC data
• Draw conclusions
![Page 4: An Analysis of the Stress Relief Process of Drum Rotors John Moran Conduction Heat Transfer MEAE6630H01 April 13, 2000.](https://reader036.fdocuments.us/reader036/viewer/2022062313/56649d565503460f94a3454b/html5/thumbnails/4.jpg)
X
Y Z
25
28
133
212
477
490
731
885
1092
1182
X
Y Z
Fixture
TC 19, 20
TC 13, 14
CLWeld Joint 1
Weld Joint 2
Weld Joint 3
Bore (4 plcs)Web (4 plcs)
![Page 5: An Analysis of the Stress Relief Process of Drum Rotors John Moran Conduction Heat Transfer MEAE6630H01 April 13, 2000.](https://reader036.fdocuments.us/reader036/viewer/2022062313/56649d565503460f94a3454b/html5/thumbnails/5.jpg)
Comparison of TC Data with Finite Element Solution
0
100
200
300
400
500
600
700
800
900
1000
1100
1200
0 30 60 90 120 150 180 210 240 270 300 330 360 390 420 450
Minutes
Control TC
Over Temp TC
TC13
TC14
TC19
TC20
node 25 TC 13,14
node 1182 TC 19,20
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Reference Locations vs. Temperature
0
100
200
300
400
500
600
700
800
900
1000
1100
1200
0 30 60 90 120 150 180 210 240 270 300 330 360 390 420 450
Time (min.)
edge
weld joint 3
weld joint 2
weld joint 1
top bore
upper middle bore
lower middle bore
bottom bore
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Temperature profile after heat up period
![Page 8: An Analysis of the Stress Relief Process of Drum Rotors John Moran Conduction Heat Transfer MEAE6630H01 April 13, 2000.](https://reader036.fdocuments.us/reader036/viewer/2022062313/56649d565503460f94a3454b/html5/thumbnails/8.jpg)
Temperature profile after soak period
![Page 9: An Analysis of the Stress Relief Process of Drum Rotors John Moran Conduction Heat Transfer MEAE6630H01 April 13, 2000.](https://reader036.fdocuments.us/reader036/viewer/2022062313/56649d565503460f94a3454b/html5/thumbnails/9.jpg)
Temperature profile after radiation cool down period
![Page 10: An Analysis of the Stress Relief Process of Drum Rotors John Moran Conduction Heat Transfer MEAE6630H01 April 13, 2000.](https://reader036.fdocuments.us/reader036/viewer/2022062313/56649d565503460f94a3454b/html5/thumbnails/10.jpg)
Temperature profile after free convection cool down period
![Page 11: An Analysis of the Stress Relief Process of Drum Rotors John Moran Conduction Heat Transfer MEAE6630H01 April 13, 2000.](https://reader036.fdocuments.us/reader036/viewer/2022062313/56649d565503460f94a3454b/html5/thumbnails/11.jpg)
Temperature profile after forced convection cool down period
![Page 12: An Analysis of the Stress Relief Process of Drum Rotors John Moran Conduction Heat Transfer MEAE6630H01 April 13, 2000.](https://reader036.fdocuments.us/reader036/viewer/2022062313/56649d565503460f94a3454b/html5/thumbnails/12.jpg)
Conclusions
• Analysis too crude for quantitative solution but adequate for qualitative solution
• % Power to bottom heaters should be increased to even out heating
• Inner bores have slowest response, TC locations do not reflect max T’s across the part
• Large T’s across inner disks may cause warping, detailed study is warranted