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

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.