实验流体力学2012，Vol.26Issue(5)：42-46,5.
圆转矩形喷管出口宽高比对射流雷诺剪应力的影响
Reynolds shear stress characteristics of jets from circular-rectangular transition nozzles with different aspect ratios
张勃 1吉洪湖 1曹广州 1黄伟1
作者信息
- 1. 南京航空航天大学能源与动力学院,南京210016
- 折叠
摘要
Abstract
The flow field and Reynolds shear stress characteristics of the jets from 5 circular-rectangular transition nozzles and one axisymmetric nozzle were investigated with inclined hot wire. The distributions of Reynolds shear stress in the wide and narrow symmetrical planes were measured on different downstream sections. Results show that in the radial direction, Reynolds shear stress increases slowly till the interface between jet and ambient gas, then decreases fast. Rectangular nozzles can induce stronger swirl flow than axisymmetric one and larger Reynolds shear stress, which increases with increasing aspect ratio. The Reynolds shear stress increment gradually decreases when the ratio exceeds 8. The distributions are the same in both wide and narrow symmetrical planes.
关键词
圆转矩形喷管/射流/雷诺剪应力/掺混/红外抑制Key words
circular-rectangular transition nozzle/ jet/ Reynolds shear stress/ mixing/ infrared suppress
分类
航空航天引用本文复制引用
张勃,吉洪湖,曹广州,黄伟..圆转矩形喷管出口宽高比对射流雷诺剪应力的影响[J].实验流体力学,2012,26(5):42-46,5.
