Study on Geometric Modeling for Gas Turbine Centrally-staged Swirling Combustor
Aiming at the problem that the combustion experiment of a prototype burner of gas turbine was difficult to carry out,the modeling experimental study of gas turbine centrally-staged swirling combustor was performed in this paper based on characteristic parameters such as characteristic velocity,Reynolds number(Re)and Damkohler number(Da).By means of flame self-luminescence photography and gas component analysis,the consistency of the test results of three different simulation criteria,such as uni-form velocity,equal Reynolds number and equal Damkohler number,in terms of flame structure,exhaust temperature and pollutant emission was compared under the same stratification ratio to determine the mod-eling characteristics of different simulation criteria;under different stratification ratios,the influence of stratification ratio on the modeling effect of Da criterion was studied.The results show that the difference of the modeling results between the model burner and the prototype is the smallest when the Da criterion is applied to the modeling;the equal Reynolds number criterion differs greatly from the prototype combus-tor in the modeling of various characteristics.When the stratification ratio is changed and the criterion of equal Damkohler number is selected for the modeling method,the modeling difference of the flame struc-ture decreases with the increase of the stratification ratio,and the NO emission difference is the smallest when the stratification ratio is 1.
centrally-stagedsimilarity criteriavariable stratification ratio
万方数据
维普
