Tunable fluid flow control system

A control system, fluid flow technology, applied in the direction of controlling combustion, regulating fuel supply, burner, etc., can solve problems such as characteristic response frequency and life limit

Inactive Publication Date: 2011-01-26
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, mechanically actuated systems have the disadvantage that the characteristic response frequency and lifetime of mechanically actuated systems are limited
However, mechanically actuated systems have the disadvantage that the characteristic response frequency and lifetime of mechanically actuated systems are limited

Method used

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  • Tunable fluid flow control system
  • Tunable fluid flow control system
  • Tunable fluid flow control system

Examples

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Embodiment Construction

[0101] As discussed in detail below, certain embodiments of the present invention disclose an adjustable fluid flow control system with a fluid oscillator. A fluid oscillator includes a movable boundary wall. A source of pressurized gas is coupled to the movable boundary wall and is configured to supply a flow of pressurized gas to the movable boundary wall to actuate the boundary wall. The boundary wall is actuatable to change the volume of the cavity in the fluidic oscillator in order to control the frequency of the flow of pulsating fluid through the fluidic oscillator. A portion of the fluid is bypassed by the fluid oscillator to control the magnitude of the flow of pulsating fluid produced by the fluid oscillator. According to some embodiments of the invention, an adjustable fluid oscillator supplies a pulsating fluid flow to a target of interest at a frequency, amplitude, or combination thereof selected by an operator using a control system. According to certain other ...

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Abstract

A tunable fluid flow control system includes a fluidic oscillator having a movable boundary wall. A pressurized gas source is coupled to the movable boundary wall and configured to supply a stream of pressurized gas to the movable boundary wall to actuate the boundary wall. The boundary wall is actuatable to vary a cavity volume in the fluidic oscillator so as to control frequency of flow of a pulsating fluid generated by the fluidic oscillator. A portion of a fluid is bypassed the fluidic oscillator so as to control amplitude of flow of a pulsating fluid generated by the fluidic oscillator.

Description

technical field [0001] The present invention relates generally to tunable fluid flow control systems, and more particularly to tunable fluid flow control systems for controlling dynamic pressure variations, fluid boundary layer resistance, or combinations thereof in combustors. Tuning the fluidic oscillator. Background technique [0002] In one application involving combustion, lean premixed combustion (LPC) is currently one of the most promising concepts for maintaining high efficiency in gas turbine combustors while significantly reducing emissions. This mode of combustion operates with an excess of air to reduce the flame temperature in the burner to acceptable levels typically less than 1800 oc. At these flame temperatures, thermal NOx (nitrogen oxides) production is virtually eliminated; and transient NOx production is negligible. This inherent benefit is offset by several potential disadvantages. LPC systems can have problems with flame stability, noise, and can exh...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): F23N5/00
CPCF23R3/286F23N5/242F23R2900/00001F23D2900/14482F23N2025/04F23K2900/05001F23R2900/00013F23N1/002F23N2225/04
InventorJ·M·海恩斯C·切雷特利
OwnerGENERAL ELECTRIC CO