环管型燃烧室喷雾燃烧DES模拟  

DES of spray combustion in can-annular combustor

作　　者：董红[1] 闻雪友[2] 李鹏 贺星[1] 

机构地区：[1]海军工程大学动力工程学院,武汉430033 [2]中国船舶重工集团公司第七0三研究所,哈尔滨150078 [3]海军驻某军事代表室,上海201913

出　　处：《海军工程大学学报》2014年第5期57-61,82,共6页Journal of Naval University of Engineering

基　　金：国家部委基金资助项目(4010303010402)

摘　　要：为研究燃气轮机燃烧室内复杂的两相三维湍流燃烧问题,采用基于Realizable k-ε模型的分离涡模拟(DES)方法对环管型燃烧室进行喷雾燃烧数值模拟。数值模拟结果表明:DES模拟在燃烧区发挥出大涡模拟(LES)的作用,能获取结构复杂的流场、温度场和涡量场,其对流场内涡结构的捕捉和分辨能力明显强于传统的RANS(雷诺时均N-S方法)模拟。与实验数据对比发现,DES模拟所得燃烧产物含量和燃烧室出口温度分布更符合。因此,DES方法可用于复杂形状燃烧室的燃烧数值模拟,能够避免RANS模型对湍流脉动进行平均处理导致耗散过大、抹平涡结构的缺点,从而可获取更准确的计算结果。To research the complex two-phase three-dimensional turbulent combustion in the gas turbine combustor, the DES（detached eddy simulation） method based on Realizable k-ε model is adopted to simulate the dual orifice atomizer spray combustion in the can-annular combustor. The result shows that the DES method functions as the LES （large eddy simulation） method in the combustion area and obtains information about the complex flow field, temperature field and vortex field. Its ability to capture and identify the vortex structure is better than that of the traditional RANS method. According to the experiment result, the DES method deals with the temperature field of the combustor exit more suitably than the RANS method, so it can be used for the combustion simulation of a complex structural combustor to obtain a better simulation result. Besides, it can avoid the disadvantages such as unreasonable high dissipation and vortex-removed structure caused by the average treatment of turbulent fluctuation by means of the RANS model.

关 键 词：环管型燃烧室 喷雾燃烧 分离涡模拟 

分 类 号：V231.2[航空宇航科学与技术—航空宇航推进理论与工程]