Patent US4916715A successfully refreshed from Google Patents.
US4916715A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for measuring the distribution of heat flux and heat transfer coefficients on the surface of a cooled component used in a high temperature environment
Assignee: General Electric Co
•
Filing: 1988-04-13
•
Granted: 1990-04-10
•
Expires: 2008-04-13
Abstract
Abstract Heat flux distribution and heat transfer coefficient distribution over a surface of a component used in a high temperature environment are determined by supplying coolant of predetermined characteristics to the component and measuring a temperature distribution over a predetermined surface. The heat flux at each temperature measurement point on the surface of the component is determined from heat flux calibration data obtained before the component is placed in service and while it is being operated at in-service cooling conditions. The heat transfer coefficient at various locations on the surface of the component is determined from the heat flux indicated by the heat flux calibration data, the temperature of the surface, and the temperature of the environment in which the component is situated.
Inventors
- 👤 Eugene F. Adiutori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:29
CPC Classifications
G; G01; G01K; G01K17/00; G01K17/06; G01K17/08; G01K17/20; G01N; G01N25/00; G01N25/18
Claims Analysis
Total Claims: 42
Claim 1
Independent Claim
177 words
A method for determining heat flux on a surface of a component, comprising the steps of: attaching one or more temperature measuring devices to a predetermined surface of a component for measuring the temperature of the predetermined surface at the location of each temperature measuring device; attaching a heater to a preselected surface of the component; applying coolant having predetermined characteristics to the component; applying a plurality of predetermined amounts of heat to the heater while the coolant having predetermined characteristics is being applied to the component; measuring the temperature of the coolant and the temperature of the predetermined surface of the component for each predetermined amount of heat; and deriving heat flux calibration data for each temperature measuring device from the amount of heat applied to the surface, the temperature of the coolant, and the temperature of the predetermined surface to calibrate each said temperature measuring device so that temperature indicated by each said temperature measuring device and temperature of coolant applied to said component define heat flux at the location of said temperature measuring device.
Claim 2
Independent Claim
177 words
A method for determining heat flux on a surface of a component, comprising the steps of: attaching one or more temperature measuring devices to a predetermined surface of a component for measuring the temperature of the predetermined surface at the location of each temperature measuring device; attaching a heater to a preselected surface of the component; applying coolant having predetermined characteristics to the component; applying a plurality of predetermined amounts of heat to the heater while the coolant having predetermined characteristics is being applied to the component; measuring the temperature of the coolant and the temperature of the predetermined surface of the component for each predetermined amount of heat; and deriving heat flux calibration data for each temperature measuring device from the amount of heat applied to the surface, the temperature of the coolant, and the temperature of the predetermined surface to calibrate each said temperature measuring device so that temperature indicated by each said temperature measuring device and temperature of coolant applied to said component define heat flux at the location of said temperature measuring device.
Claim 3
Dependent Claim
59 words
The method of claim 1, in which the step of applying cooling fluid to the component comprises the step of applying cooling fluid to one or more passages in the component and the step of attaching a heater to a preselected surface of the component comprises the step of attaching the heater to an exterior surface of the component.
Claim 4
Dependent Claim
27 words
The method of claim 1, in which the coolant applying step comprises the step of applying coolant having a predetermined flow rate and temperature to the component.
Claim 5
Dependent Claim
26 words
The method of claim 1 in which the coolant applying step comprises the step of applying coolant having a predetermined pressure and temperature to the component.
Claim 6
Dependent Claim
31 words
The method of claim 1, in which the amount of heat applied to the surface is derived from the electrical power input to the heater and the area of the heater.
Claim 7
Dependent Claim
40 words
The method of claim 1, in which the step of attaching one or more temperature measuring devices to a predetermined surface of the component comprises the step of attaching one or more thermocouples to the predetermined surface of the component.
Claim 8
Dependent Claim
36 words
The method of claim 1, in which the step of attaching a heater to a predetermined surface of the component comprises the step of attaching a resistive, foil heater to the preselected surface of the component.
Claim 9
Dependent Claim
14 words
The method of claim 1, in which the component is a turbine engine component.
Claim 10
Dependent Claim
13 words
The method of claim 1, in which the component is a turbine blade.
Claim 11
Dependent Claim
55 words
The method of claim 1, in which the deriving step comprises the step of: deriving data defining a heat flux calibration curve for each temperature measuring device by determining values related to the predetermined amounts of heat applied to the component as a function of the difference in temperature between the surface and the coolant.
Claim 12
Dependent Claim
68 words
The method of claim 10, further comprising the steps of: removing the heater from the surface of the component; applying coolant of predetermined characteristics to the component; measuring the temperature of the surface at each temperature measuring device; and determining the heat flux at each temperature measuring device from the heat flux calibration curve and the temperature at each temperature measuring device after the heater has been removed.
Claim 13
Dependent Claim
38 words
The method of claim 11, in which the step of applying coolant of predetermined characteristics to the component comprises the step of applying coolant of the characteristics applied to the component with the heater attached to the component.
Claim 14
Dependent Claim
46 words
The method of claim 11, further comprising the steps of: measuring the mainstream temperature; and determining the heat transfer coefficient at each temperature measuring device from the heat flux at each temperature measuring device, the mainstream temperature, and the temperature measured by each temperature measuring device.
Claim 15
Dependent Claim
38 words
The method of claim 13, in which the determining step comprises the step of dividing the heat flux at each temperature measuring device by the difference between the mainstream temperature and the temperature at each temperature measuring device.
Claim 16
Dependent Claim
67 words
The method of claim 1, further comprising the steps of: removing the heater from the surface of the component; applying coolant of predetermined characteristics to the component; measuring the temperature of the surface at each temperature measuring device; and determining the heat flux at each temperature measuring device from the heat flux calibration data and the temperature at each temperature measuring device after removal of the heater.
Claim 17
Independent Claim
38 words
The method of claim, 15, in which the step of applying coolant of predetermined characteristics to the component comprises the step of applying coolant of the characteristics applied to the component with the heater attached to the component.
Claim 18
Dependent Claim
46 words
The method of claim 15, further comprising the steps of: measuring the mainstream temperature; and determining the heat transfer coefficient at each temperature measuring device from the heat flux at each temperature measuring device, the mainstream temperature, and the temperature measured by each temperature measuring device.
Claim 19
Dependent Claim
38 words
The method of claim 17, in which the determining step comprises the step of dividing the heat flux at each temperature measuring device by the difference between the mainstream temperature and the temperature at each temperature measuring device.
Claim 20
Independent Claim
198 words
An apparatus for determine heat flux on a surface of a component, comprising: one or more temperature measuring devices attached to a predetermined surface of the component for measuring the temperature of the predetermined surface at the location of each temperature measuring device; a heater attached to a preselected surface of the component; a means for supplying coolant of predetermined characteristics to the component; a means for measuring the temperature of the coolant supplied to the component; a means for applying a plurality of predetermined amounts of heating to the component by way of the heater; a means for recording the temperature of the coolant and the temperature of the surface of the component at the location of each temperature measuring device for each predetermined amount of heating; and a means for deriving heat flux calibration data for each temperature measuring device from the amount of heating applied to the surface, the temperature of the coolant, and the temperature of the surface to calibrate each said temperature measuring device so that temperature indicated by each said temperature measuring device and temperature of coolant applied to said component define heat flux at the location of said temperature measuring device.
Claim 21
Independent Claim
198 words
An apparatus for determine heat flux on a surface of a component, comprising: one or more temperature measuring devices attached to a predetermined surface of the component for measuring the temperature of the predetermined surface at the location of each temperature measuring device; a heater attached to a preselected surface of the component; a means for supplying coolant of predetermined characteristics to the component; a means for measuring the temperature of the coolant supplied to the component; a means for applying a plurality of predetermined amounts of heating to the component by way of the heater; a means for recording the temperature of the coolant and the temperature of the surface of the component at the location of each temperature measuring device for each predetermined amount of heating; and a means for deriving heat flux calibration data for each temperature measuring device from the amount of heating applied to the surface, the temperature of the coolant, and the temperature of the surface to calibrate each said temperature measuring device so that temperature indicated by each said temperature measuring device and temperature of coolant applied to said component define heat flux at the location of said temperature measuring device.
Claim 22
Dependent Claim
55 words
The apparatus of claim 19, in which the deriving means comprises: a means for deriving data defining a heat flux calibration curve for each temperature measuring device by determining values related to the predetermined amounts of heating applied to the component as a function of the difference in temperature between the surface and the coolant.
Claim 23
Dependent Claim
27 words
The apparatus of claim 19, in which the coolant supplying means comprises a means for supplying coolant to the component having a predetermined flow rate and temperature.
Claim 24
Dependent Claim
26 words
The apparatus of claim 19, in which the coolant supplying means comprises a means for supplying coolant to the component having a predetermined pressure and temperature.
Claim 25
Dependent Claim
16 words
The apparatus of claim 19, in which the temperature measuring devices are one or more thermocouples.
Claim 26
Dependent Claim
14 words
The apparatus of claim 19, in which the heater is a resistive, foil heater.
Claim 27
Dependent Claim
38 words
The apparatus of claim 19, further comprising: a means for deriving the heat flux at one or more of the temperature measuring devices from the heat flux calibration data and the temperature measured by the temperature measuring means.
Claim 28
Dependent Claim
29 words
The apparatus of claim 25, further comprising: a means for deriving the heat transfer coefficient at one or more of the temperature measuring devices from the derived heat flux.
Claim 29
Dependent Claim
21 words
The apparatus of claim 26, in which the heat transfer coefficient deriving means comprises a means for measuring a mainstream temperature.
Claim 30
Dependent Claim
44 words
The apparatus of claim 27, in which the deriving means derives the heat transfer coefficient at the one or more temperature measuring devices from the derived heat flux, the measured mainstream temperature, and the temperature measured by the one or more temperature measuring devices.
Claim 31
Independent Claim
100 words
An apparatus for determining the heat flux at one or more locations on a surface of a component in a high temperature environment, comprising: a means for applying coolant of predetermined characteristics to the component; a means for measuring the temperature at one or more locations on a predetermined surface of the component when it is operated in a high temperature environment; and means for determining the heat flux at the one or more locations on the component from derived heat flux calibration data related to said predetermined characteristics of said coolant and the output of the temperature measuring means.
Claim 32
Independent Claim
100 words
An apparatus for determining the heat flux at one or more locations on a surface of a component in a high temperature environment, comprising: a means for applying coolant of predetermined characteristics to the component; a means for measuring the temperature at one or more locations on a predetermined surface of the component when it is operated in a high temperature environment; and means for determining the heat flux at the one or more locations on the component from derived heat flux calibration data related to said predetermined characteristics of said coolant and the output of the temperature measuring means.
Claim 33
Independent Claim
100 words
An apparatus for determining the heat transfer coefficient for one or more locations on a surface of a component in a high temperature environment, comprising: a means for applying coolant of predetermined characteristics to the component; a means for measuring the temperature at one or more locations on a predetermined surface of the component when it is operated in a high temperature environment; and a means for determining the heat transfer coefficient for the one or more locations from derived heat flux calibration data related to said predetermined characteristics of said coolants and the output of the temperature measuring means.
Claim 34
Independent Claim
100 words
An apparatus for determining the heat transfer coefficient for one or more locations on a surface of a component in a high temperature environment, comprising: a means for applying coolant of predetermined characteristics to the component; a means for measuring the temperature at one or more locations on a predetermined surface of the component when it is operated in a high temperature environment; and a means for determining the heat transfer coefficient for the one or more locations from derived heat flux calibration data related to said predetermined characteristics of said coolants and the output of the temperature measuring means.
Claim 35
Independent Claim
92 words
A method for determining the heat flux at one or more locations on a surface of a component in a high temperature environment, comprising: applying coolant of predetermined characteristics to the component; measuring the temperature at one or more locations on a predetermined surface of the component when it is operated in a high temperature environment; and determining the heat flux at the one or more locations on the component from derived heat flux calibration data related to said predetermined characteristics of said coolant and the results of the temperature measurement step.
Claim 36
Independent Claim
92 words
A method for determining the heat flux at one or more locations on a surface of a component in a high temperature environment, comprising: applying coolant of predetermined characteristics to the component; measuring the temperature at one or more locations on a predetermined surface of the component when it is operated in a high temperature environment; and determining the heat flux at the one or more locations on the component from derived heat flux calibration data related to said predetermined characteristics of said coolant and the results of the temperature measurement step.
Claim 37
Independent Claim
91 words
A method for determining the heat transfer coefficient at one or more locations on a surface of a component in a high temperature environment, comprising: applying coolant of predetermined characteristics to the component; measuring the temperature at one or more locations on a predetermined surface of the component when it is operated in a high temperature environment; and determining the heat transfer coefficient for the one or more locations from derived heat flux calibration data related to said predetermined characteristics of said coolant and the results of the temperature measurement step.
Claim 38
Independent Claim
91 words
A method for determining the heat transfer coefficient at one or more locations on a surface of a component in a high temperature environment, comprising: applying coolant of predetermined characteristics to the component; measuring the temperature at one or more locations on a predetermined surface of the component when it is operated in a high temperature environment; and determining the heat transfer coefficient for the one or more locations from derived heat flux calibration data related to said predetermined characteristics of said coolant and the results of the temperature measurement step.
Claim 39
Independent Claim
127 words
A method for determining heat flux on a predetermined surface of a component, comprising the steps of: applying coolant having predetermined characteristics to a preselected surface of the component; applying a plurality of predetermined amounts of heat to the predetermined surface of the component while coolant having the predetermined characteristics is being applied to the component; measuring the temperature of the coolant and the temperature of the predetermined surface of the component for each predetermined amount of heat; and deriving heat flux calibration date from the predetermined amount of heat being applied to the component, the measured temperature of the coolant, and the measured temperature of the predetermined surface so that temperature measured from the predetermined surface and said coolant define heat flux at the predetermined surface.
Claim 40
Independent Claim
127 words
A method for determining heat flux on a predetermined surface of a component, comprising the steps of: applying coolant having predetermined characteristics to a preselected surface of the component; applying a plurality of predetermined amounts of heat to the predetermined surface of the component while coolant having the predetermined characteristics is being applied to the component; measuring the temperature of the coolant and the temperature of the predetermined surface of the component for each predetermined amount of heat; and deriving heat flux calibration date from the predetermined amount of heat being applied to the component, the measured temperature of the coolant, and the measured temperature of the predetermined surface so that temperature measured from the predetermined surface and said coolant define heat flux at the predetermined surface.
Claim 41
Dependent Claim
27 words
The method of claim 33, further comprising the step of: deriving the heat flux for the predetermined surface of the component from the heat flux calibration data.
Claim 42
Dependent Claim
28 words
The method of claim 33, further comprising the step of: deriving a heat transfer coefficient for the predetermined surface of the component from the heat flux calibration data.
References Cited (Backward Citations)
US3123996A
Cited
US1528383A
Cited
US2585934A
Cited
US3095743A
Cited
US3221554A
Cited
US3354720A
Cited
US3592061A
Cited
US3623368A
Cited
US3672204A
Cited
US4058975A
Cited
US4024751A
Cited
US4309991A
Cited
US4568198A
Cited
US4553852A
Cited
US4644162A
Cited
US4595298A
Cited
US4812050A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-04-09 | 1993-10-09 | 1994-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-09 | 1997-10-09 | 1998-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-09 | 2001-10-09 | 2002-04-10 | $7700.00 | Window Closed / Lapsed |