N_(2)and Ar dilution on the premixed biogas jet flame under external acoustic enforcement  

作　　者：Bugrahan Alabas Ilker Yılmaz YakupÇam 

机构地区：[1]Department of Aeronautical Engineering,Faculty of Aeronautics and Astronautics,Erciyes University,Kayseri 38039,Turkey [2]Department of Energy Systems Engineering,Faculty of Technology,Gazi University,Ankara 06560,Turkey [3]Department of Aircraft Maintenance and Repair,Faculty of Aeronautics and Astronautics,Erciyes University,Kayseri 38039,Turkey

出　　处：《Propulsion and Power Research》2023年第4期486-504,共19页推进与动力（英文）

基　　金：The authors wish to thank by Erciyes University Research Foundation(Project No.FBAÜ-2022-11955)for its financial support.

摘　　要：In this study,combustion instabilities and flue gas emission changes under different dilutions of N_(2)(nitrogen)and Ar(argon)of a promising biogas mixture(70%CH4-30%CO_(2))in the fight against greenhouse gas emissions were investigated.In the experiments,additions were made from 0%to 50%at intervals of 10%for both gases.In order to detect the instability of the flame,external acoustic enforcements at different frequencies was applied through the speakers placed in the combustion chamber arms.The dynamic pressure fluctuation values were recorded.The results showed that low dilution ratios were effective in reducing flame instability for both inert gases.However,as the dilution ratio increased,the fuel/air mixture became leaner and blowoff occurred.In the case of comparing two different gases,it has been observed that the effect of argon gas on reducing dynamic pressure fluctuation is higher.Burner outlet temperature and brightness values of the flame decreased in both Ar and N_(2)dilution.CO and NOx emissions increased with increasing diluent volume for all dilution conditions.When the emissions of the two diluent gases are compared,the CO emission,which was 3134 ppm in the undiluted condition,increased up to 4949 ppm in 50%Ar dilution,while it increased to 4521 ppm in 50%N_(2)dilution.

关 键 词：BIOGAS Combustion instabilities Pollutant emissions Gas turbine combustor DILUTION 

分 类 号：S216.4[农业科学—农业机械化工程]