Variable-working-condition emission performance prediction method for combustion chamber of gas turbine

Abstract

The invention aims to provide a variable working condition emission performance prediction method for a combustion chamber of a gas turbine, and the method comprises the following steps: carrying outmesh generation and numerical simulation calculation of a combustion chamber model through FLUENT software for some typical working conditions; dividing the combustion chamber into five characteristic areas including a head mixing area, a main combustion area, a wall surface cooling area, a backflow area and a mixing area according to the combustion process, temperature distribution and flow field analysis; according to the divided feature regions, establishing a chemical reactor network (CRN) model for the combustion chamber of the gas turbine by utilizing Chemkin-Pro software; determining the effective volume of the feature region by adopting an infinitesimal method; and finding out calculation parameters of the reactor under other working conditions by adopting a Newton interpolation polynomial method, and predicting the emission performance under unknown working conditions. A method of combining fluent numerical simulation with a chemical reaction network is utilized, and the NOxemission performance of the combustion chamber of the gas turbine at different fuel-air ratios under the design working condition and the bias working condition is rapidly predicted.

Description

technical field [0001] The invention relates to a discharge prediction method, in particular to a gas turbine discharge prediction method. Background technique [0002] Gas turbine is an important part of the field of energy power equipment, and the gas turbine industry is a strategic industry of national energy. Gas turbines play a very important role in ship power, aerospace, ground power generation and other fields. Especially in the field of ships, gas turbines are more and more widely used as ship power and power generation equipment due to their advantages of high power and high efficiency. In recent years, with the country's increasing emphasis on environmental pollution, the requirements for gas turbines are not limited to power performance requirements, and the NOx emission requirements for gas turbines are becoming increasingly stringent. Emissions have also become an important indicator of gas turbine design. In the stage of gas turbine design and development, t...

AI Technical Summary

Problems solved by technology

At present, numerical simulation software such as CFD is generally used for the prediction of combustion emissions of gas turbines. Although this method has high accuracy, the calculation efficiency is low; and it can only be predicted for the design operating point, but it cannot be applied to partial operating conditions. Condition

Images