Unlock instant, AI-driven research and patent intelligence for your innovation.

Fuel staging in a burner

A burner and fuel technology, applied in burners, combustion chambers, combustion methods, etc., can solve the problems of reduced premixed flame stability, thermodynamic-acoustic instability, instability, etc.

Inactive Publication Date: 2011-06-15
SIEMENS AG
View PDF6 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The less stable, easily moving flame front of premixed flames leads to periodic heat release rates, which in turn lead to flame motion, unstable fluid dynamics, and the development of thermodynamic-acoustic instabilities
[0007] 3. Equivalence ratio fluctuations are probably the most common coupling mechanism linking unstable heat release with unstable pressure oscillations
[0010] 6. Another very important reason for the reduction of premixed flame stability is that the steep gradient of fuel and air mixing will be eliminated from the combustion process
This results in temperature differences from burner to burner which can damage engine components

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Fuel staging in a burner
  • Fuel staging in a burner
  • Fuel staging in a burner

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0050] Hereinafter, a number of embodiments will be described in more detail with reference to the disclosed drawings.

[0051] in figure 1 In the above, the burner is described with a burner 1 having a casing 2 which encapsulates the burner assembly.

[0052] For clarity, figure 2 A cross-sectional view of the burner on the axis of rotational symmetry is shown. The main part of the combustor is the radial swirler 3, a plurality of combustion channels 4a, 4b, 4c and the pilot combustion chamber 5.

[0053] As mentioned above, the burner 1 works according to the following principle, that is: "supply" heat and high concentration of free radicals from the discharge port 6 of the pilot combustion chamber 5 to the lean premixed air / fuel swirl The main flame 7 burns in the middle, so as to maintain the rapid and stable combustion of the main lean oil premixed flame 7, in which the lean oil premixed air / fuel swirls out of the first outlet 8 and the second lean oil of the first lean oil pr...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a method for staging operation at start up of a burner for a gas turbine engine combustor. It is one object of the invention to stabilize the combustion of a lean-rich partially premixed low emission burner for a gas turbine combustor at all engine load conditions. The method includes the steps of : adding fuel (23) mixed with air (24) to the pilot combustor (5); igniting the mixture utilizing an ignitor (34) provided at an upstream end of the pilot combustor (5) for initiating a lean flame (35) inside the pilot combustor (5) and for providing a flow of said radicals (32) and heat; imparting a swirl of fuel (30b) and air (27) at an outside at the exit (6) of the pilot combustor (5) at an upstream end of a combustion room for creating and sustaining a main lean flame (7); gradually adding a swirl of air (12) and fuel (14) for establishing a full load stage to at least one channel (10, 11).

Description

Technical field [0001] The present invention relates to a combustor preferably used in a gas turbine engine, and more specifically to a fuel staging of a combustor suitable for stabilizing the combustion of the engine, and further relates to a pilot combustor to provide combustion products for main Fuel grading in a burner with lean premixed combustion stability. Background technique [0002] Gas turbine engines are used in various applications including power generation, military and commercial aviation, pipeline transportation, and marine transportation. In a gas turbine engine operating in the LPP mode, fuel and air are supplied to the combustion chamber and are ignited by the flame after mixing, thereby starting combustion. In addition to thermal efficiency, proper mixing of fuel and air, the main issues related to the combustion process of gas turbine engines are related to flame stabilization, pulsation and noise elimination, and the control of polluting emissions, especia...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): F23R3/34
CPCF23R3/346F23D2900/00015F23R3/343
Inventor V·米洛萨夫莱维克
Owner SIEMENS AG