Start fuel supply control method and system for micro gas turbine

A micro gas turbine and fuel supply control technology, which is applied in the starting of the engine, the starting of the turbine/propulsion device, and the fuel delivery system of the turbine/propulsion, etc., can solve the problems of damaged ignition performance, ignition failure, and reduced fuel supply, etc. Achieve the effect of improving oil-gas ratio, avoiding over-temperature, and enhancing atomization performance

Active Publication Date: 2014-08-06
CHINA AVIATION POWER MACHINE INST
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Problems solved by technology

[0015] The purpose of the present invention is to provide a start-up fuel supply control method and system for a micro gas turbine, so as to solve the problem that the existing micro gas turbine adopts a fuel regulator to reduce the fuel supply to meet the high-altitude application scene, resulting in impaired ignition performance or even ignition failure. question

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  • Start fuel supply control method and system for micro gas turbine
  • Start fuel supply control method and system for micro gas turbine
  • Start fuel supply control method and system for micro gas turbine

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Embodiment Construction

[0049] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways defined and covered by the claims.

[0050] The invention is used to expand the geographical application range of the micro gas turbine. Ground micro gas turbines generally work at altitudes below 3,000 meters. If they are directly applied to plateau application scenarios, it will directly lead to a decrease in the performance of micro gas turbines in terms of safety, reliability, maintainability, and service life, and the requirements for ignition energy As the temperature rises, the ignition reliability decreases, and the air density decreases due to high altitude. If the fuel supply law remains unchanged, the fuel-air ratio in the combustion chamber will increase significantly, and the fuel concentration will increase, resulting in deviation from the optimal design ignition range. I...

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Abstract

The invention discloses a start fuel supply control method and system for a micro gas turbine, and is used for fuel supply control in the start process of the micro gas turbine. The micro gas turbine adopts a centrifugal atomization fuel nozzle, fuel is supplied to the centrifugal atomization fuel nozzle through a fuel control unit, atomized by the centrifugal atomization fuel nozzle, and ignited for combustion in a combustion chamber; the fuel supply requirements of the micro gas turbine in plain and plateau application scenarios can be met through adjusting the flow amount and/or a spray cone angle of the centrifugal atomization fuel nozzle. According to the method and system, under the condition of not changing technical parameters of the fuel supply control unit, the flow pressure characteristics of the fuel nozzle can be changed, the start fuel flow can be reduced, the gas-fuel ratio of ignition start can be increased, the fuel pressure in front of the nozzle can be increased, the atomization performance is enhanced, and the plateau ignition start performance is enhanced, and thus the fuel supply characteristic requirements of the micro gas turbine in high altitude application can be met and the operation field range of the micro gas turbine is widened.

Description

technical field [0001] The invention relates to the technical field of combustion and control of gas turbines, in particular, to a method and system for controlling start-up fuel supply of micro gas turbines. Background technique [0002] Microturbine (Microturbine or Micro-turbines) is a newly developed small-scale heat engine. Its stand-alone power ranges from 25 to 300kW. It is mainly composed of a compressor, a combustion chamber, a turbine, some generator sets, and a regenerator. The micro gas turbine generating set has a series of advantages such as high efficiency, low noise, light weight, small size, low pollution, and multiple integrated expansion. It plays an important role and strategic significance in national economic fields such as electric power and power, and national security. , It is of great significance to the development of high-tech in my country's related fields such as energy, electric power, aviation, aerospace, ships, vehicles, military and other nat...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02C9/26F02C7/26
Inventor 李皓然卢志峰李玮薇肖军辉周韧峰张红霞
Owner CHINA AVIATION POWER MACHINE INST
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