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Micro-mixing nozzle and design method thereof

A design method and micro-mixing technology, applied in the field of gas turbines, can solve the problems of weakening combustion oscillation, unstable heat release, long design cycle, etc., and achieve the effects of reducing design and processing costs, enhancing flame stability, and speeding up the design process

Active Publication Date: 2020-05-19
CHINA UNITED GAS TURBINE TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing nozzle design process is to design the nozzle first, then calculate the flame surface of the nozzle, do experiments or calculations to determine the combustion oscillation problem, and then weaken the combustion oscillation problem by other means (such as locally changing the structure or designing a resonant cavity, etc.). The longer the period, the greater the risk of combustion oscillations
Moreover, the flame surface formed by the existing nozzle is a flat flame surface, the flame surface is fixed and single, the area of ​​the flame surface is small, the heat release is too concentrated, and the energy release will cause stronger unstable heat release, which is easy to induce combustion oscillation

Method used

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  • Micro-mixing nozzle and design method thereof

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Embodiment Construction

[0026] Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention. In describing the present invention, it is to be understood that the terms "centre", "upper", "lower", "front", "rear", "left", "right", "inner", "outer", " The orientation or positional relationship indicated by "axial", "radial", and "circumferential" are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying Any device or element must have a specific orientation, be constructed and operate in a specific orientation and therefore should not be construed as limiting the invention.

[0027] Such as figure 1 A...

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Abstract

The invention discloses a micro-mixing nozzle and a design method thereof. According to the design method of the micro-mixing nozzle, the design process of a flame surface is introduced, the parameterization research is carried out on the flame surface and a nozzle outlet profile; according to the design method of the micro-mixing nozzle, the design of the flame stability is changed from a verification item to a design item, so that the design processing cost and design rework are reduced; and according to the parameterization, the automatic optimization can be carried out, and the design process can be accelerated, so that the design period is short, and the risk of combustion oscillation is reduced.

Description

technical field [0001] The invention relates to the technical field of gas turbines, in particular to a micro-mixing nozzle and a design method thereof. Background technique [0002] The mixture of compressed air and fuel is combusted in the combustor of the gas turbine to generate high-temperature flue gas to drive the turbine to do work. The combustor mixes fuel and air through its nozzle (also known as fuel nozzle) and injects it into the combustion area. The uniformity of fuel and air mixing is an important factor affecting the emission of pollutants from gas turbines. Improving the uniformity of fuel and air mixing can reduce pollutant emissions. [0003] In the related art, the nozzle of the gas turbine adopts a multi-nozzle structure or a micro-mixing structure to improve the mixing ability of fuel and air. However, the existing nozzle design process is to design the nozzle first, then calculate the flame surface of the nozzle, do experiments or calculations to deter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23R3/28
CPCF23R3/286
Inventor 李珊珊刘小龙薛彧吕煊杨旭
Owner CHINA UNITED GAS TURBINE TECH CO LTD
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