同轴旋转射流燃烧器空气动力场的可视化研究  

Visualization Research on the Aerodynamic Field of a Co-axial Swirl-jet Burner

作　　者：吴江[1] 章明川[1] 田凤国[1] 王雷[1] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200240

出　　处：《热能动力工程》2003年第4期382-386,共5页Journal of Engineering for Thermal Energy and Power

基　　金：国家自然科学基金资助项目(59876019);国家重点基础研究发展规划基金资助项目(G1999022209)

摘　　要：对同轴旋转射流燃烧器空气动力场进行了可视化实验研究。通过图象处理得到可视区边界,即一、二次风之间的界面。运用分形理论对其分形维数进行了研究,发现在不同的一、二次风旋流强度与不同的一次风率下,分形维数变化呈现一定的分布,据此确定了分层工况。A visualization experimental study has been conducted of the aerodynamic field of a co axial swirl jet burner. The boundary of a visual zone, namely, the interface between primary air and secondary air, was obtained through the use of image processing. Moreover, with the use of a fractal theory the fractal dimension of the above interface was also studied. It is found that under different swirling flow intensities of the primary and secondary air and different primary air feeding rates the fractal dimension variation assumes a definite distribution pattern. On the basis of the above the stratified flow conditions were determined.

关 键 词：低NOX燃烧器 空气动力场 可视化实验 分形维数 旋流强度 

分 类 号：TK16[动力工程及工程热物理—热能工程] O354[理学—流体力学]