海军航空大学学报2025，Vol.40Issue(4)：507-518,12.DOI:10.7682/j.issn.2097-1427.2025.04.001
基于EMD-FFT方法的双旋流燃烧室非定常特性分析
Unsteady Characteristics Analysis of Double-Swirled Combustor Based on EMD-FFT Method
摘要
Abstract
A kerosene fueled dual swirling combustor(GTMC)is simulated by the large eddy simulation(LES)turbu-lent solution method combined with the transported probability density function(TPDF)turbulent combustion solution method.The temperature and velocity unsteady characteristics of GTMC are studied using empirical mode decomposi-tion(EMD)and fast Fourier transform(FFT)methods,and the spatial distribution of the main frequency of pulsation is obtained.The results show that temperature dominant frequencies of feature points with coordinates of(2 cm,0,3 cm)are 47 Hz and 761 Hz;the significance of the intrinsic mode function(IMF)is analyzed.The dominant frequency of the IMF with the highest energy density is the dominant frequency of the original signal;temperature fluctuations are mainly affected by turbulent flow;according to the Ra number field,the thermal pressure excitation and suppression re-gions always alternate.关键词
非定常特性/大涡模拟/随机场输运概率密度函数方程湍流燃烧模型/经验模态分解/快速傅里叶变换Key words
unsteady characteristic/large eddy simulation/random field probability density function transport equation turbulent combustion model/empirical mode decomposition/fast Fourier transform分类
航空航天引用本文复制引用
王方,张敏琦,周佳伟,王煜栋,金捷..基于EMD-FFT方法的双旋流燃烧室非定常特性分析[J].海军航空大学学报,2025,40(4):507-518,12.基金项目
国家自然科学基金(20244BAB28005、20232ACB204026、12172345) （20244BAB28005、20232ACB204026、12172345）
