南京航空航天大学学报（英文版）2007，Vol.24Issue(3)：199-204,6.
压电驱动自耦合射流流动特性实验
EXPERIMENT ON FLOW CHARACTERISTICS OF SYNTHETIC JET DRIVEN BY PIEZOELECTRIC MEMBRANE
谭晓茗 1张靖周1
作者信息
- 1. 南京航空航天大学能源与动力学院,南京,210016,中国
- 折叠
摘要
Abstract
The characteristics of the flowfields of a synthetic jet actuator are experimentally investigated with the slot-nozzle driven by the piezoelectric membrane. The particle image velocimetry (PIV) and the hot-wire anemometer are utilized to measure the flowfields and the velocity profiles of the actuator with different actuating factors. Analytical results show that pairs of counter-rotating vortices are generated near the nozzle. With the development of the synthetic ject, the synthetic jet rapidly spreads in the slot-width direction; while in the slotlength direction, it contracts firstly and slowly spreads. The centerline velocity distribution has a up-down tendency varying with axial distances, and accelerates to its maximum at z/b= 10. The transverse velocity profile across the slot-width is centro-symmetric and self-similar. However, the velocity profiles across the slot-length are saddle-like near the nozzle. It shows that there are two resonance frequencies for the actuator. If the actuator works with the resonance frequency, the vorticity and the velocity of the synthetic jet are higher than those of other frequencies. Compared with the continuous jet, the synthetic jet shows special flow characteristics.关键词
自耦合射流/流动特征/速度分布/粒子测速仪Key words
synthetic jet/ flow characteristics / velocity distribution/ particle image velocimetry分类
航空航天引用本文复制引用
谭晓茗,张靖周..压电驱动自耦合射流流动特性实验[J].南京航空航天大学学报（英文版）,2007,24(3):199-204,6.
