US3738102A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel control for turbine type power plant having variable area geometry
Assignee: RTX Corp
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Filing: 1971-05-24
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Granted: 1973-06-12
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Expires: 1991-05-24
Abstract
Abstract The turbine inlet temperature of a turbine type of power plant, particularly the type that includes a variable geometry, is controlled by setting a referred weight flow of the power plant working medium and closing the loop through fuel flow so that the actual referred weight flow matches the set value. The ratio of the difference between the total pressure upstream of the burner and the static pressure downstream of the burner to the total pressure upstream of the burner serves to produce a signal indicative of the actual weight flow of the power plant working medium.
Inventors
- 👤 C Stearns
- 👤 L Urban
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:23
CPC Classifications
F; F02; F02C; F02C9/00; F02C9/26; F02C9/32
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
163 words
A fuel control for a gas turbine engine having a variable area turbine inlet geometry such that its steady state operating condition shifts for different area values, said engine having a burner, a compressor and a turbine driven by the hot gases from the burner for driving said compressor, a source of fuel, connection means interconnecting said source of fuel and said burner section, fuel metering means in said connection means for regulating the amount of fuel being delivered to said burners, and control means for controlling said fuel metering means, said control means includes means for setting a first signal indicative of Delta P/P, where Delta P differential between total pressure upstream of the burner and static pressure downstream of the burner, P total pressure upstream of the burner, means for measuring and calculating the actual Delta P/P value of the engine for generating a second signal, and means responsive to said first and second signals for controlling said fuel metering means.
Claim 2
Dependent Claim
163 words
A fuel control for a gas turbine engine having a variable area turbine inlet geometry such that its steady state operating condition shifts for different area values, said engine having a burner, a compressor and a turbine driven by the hot gases from the burner for driving said compressor, a source of fuel, connection means interconnecting said source of fuel and said burner section, fuel metering means in said connection means for regulating the amount of fuel being delivered to said burners, and control means for controlling said fuel metering means, said control means includes means for setting a first signal indicative of Delta P/P, where Delta P differential between total pressure upstream of the burner and static pressure downstream of the burner, P total pressure upstream of the burner, means for measuring and calculating the actual Delta P/P value of the engine for generating a second signal, and means responsive to said first and second signals for controlling said fuel metering means.
Claim 3
Dependent Claim
31 words
A fuel control as claimed in claim 1 including a power lever, said control means being responsive to said power lever and another engine operating variable for setting said first signal.
Claim 4
Dependent Claim
21 words
A fuel control as claimed in claim 2 wherein said other engine opErating variable is the rotational speed of said compressor.
Claim 5
Dependent Claim
19 words
A fuel control as claimed in claim 3 wherein said control means is also responsive to compressor inlet temperature.
Claim 6
Dependent Claim
165 words
A fuel control for a gas turbine engine having a variable area turbine inlet geometry such that its steady state operating condition shifts for different area values, said engine having a burner, a compressor and a turbine driven by the hot gases from the burner for driving said compressor, a source of fuel, connection means interconnecting said source of fuel and said burner section, fuel metering means in said connection means for regulating the amount of fuel being delivered to said burners, and control means for controlling said fuel metering means, said control means includes means for setting a first signal indicative of referred compressor discharge air flow, and means for measuring the actual Delta P/P value of the engine for generating a second signal, where Delta P differential between total pressure upstream of the burner and static pressure downstream of the burner, P total pressure upstream of the burner, and means responsive to said first and second signals for controlling said fuel metering means.
Claim 7
Dependent Claim
165 words
A fuel control for a gas turbine engine having a variable area turbine inlet geometry such that its steady state operating condition shifts for different area values, said engine having a burner, a compressor and a turbine driven by the hot gases from the burner for driving said compressor, a source of fuel, connection means interconnecting said source of fuel and said burner section, fuel metering means in said connection means for regulating the amount of fuel being delivered to said burners, and control means for controlling said fuel metering means, said control means includes means for setting a first signal indicative of referred compressor discharge air flow, and means for measuring the actual Delta P/P value of the engine for generating a second signal, where Delta P differential between total pressure upstream of the burner and static pressure downstream of the burner, P total pressure upstream of the burner, and means responsive to said first and second signals for controlling said fuel metering means.
Claim 8
Dependent Claim
187 words
A fuel control for a gas turbine engine having a variable area turbine inlet geometry such that its steady state operating condition shifts for different area values, said engine having a burner, a compressor and a turbine driven by the hot gases from the burner for driving said compressor, a source of fuel, connection means interconnecting said source of fuel and said burner section, fuel metering means in said connection means for regulating the amount of fuel being delivered to said burners, and control means for controlling said fuel metering means, said control means includes means for setting a first signal indicative of Delta P/P, where Delta P differential between total pressure upstream of the burner and static pressure downstream of the burner, P total pressure upstream of the burner, and means for measuring the actual Delta P/P value of the engine for generating a second signal, means responsive to said first and second signals for controlling said fuel metering means, and means responsive to another control parameter for controlling said fuel metering means when the value of said Delta P/P signal is below a predetermined value.
Claim 9
Dependent Claim
187 words
A fuel control for a gas turbine engine having a variable area turbine inlet geometry such that its steady state operating condition shifts for different area values, said engine having a burner, a compressor and a turbine driven by the hot gases from the burner for driving said compressor, a source of fuel, connection means interconnecting said source of fuel and said burner section, fuel metering means in said connection means for regulating the amount of fuel being delivered to said burners, and control means for controlling said fuel metering means, said control means includes means for setting a first signal indicative of Delta P/P, where Delta P differential between total pressure upstream of the burner and static pressure downstream of the burner, P total pressure upstream of the burner, and means for measuring the actual Delta P/P value of the engine for generating a second signal, means responsive to said first and second signals for controlling said fuel metering means, and means responsive to another control parameter for controlling said fuel metering means when the value of said Delta P/P signal is below a predetermined value.
Claim 10
Dependent Claim
24 words
A fuel control as claimed in claim 6 wherein said other control parameter is Wf/P where Wf is fuel flow in pounds per hour.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |