PIV experimental study on flow characteristics of synthetic jets

TAN Xiao-ming; ZHANG Jing-zhou

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PIV experimental study on flow characteristics of synthetic jets

更新时间：2026-07-07

- PIV experimental study on flow characteristics of synthetic jets
- Vol. 24, Issue 3, (2009)
- 作者机构：
  
  南京航空航天大学能源与动力学院,南京,210016
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2009
- 稿件说明：
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TAN Xiao-ming, ZHANG Jing-zhou. PIV experimental study on flow characteristics of synthetic jets[J]. 2009, 24(3).
DOI：

TAN Xiao-ming, ZHANG Jing-zhou. PIV experimental study on flow characteristics of synthetic jets[J]. 2009, 24(3). DOI：

摘要

采用三维粒子图像测速仪(PIV)对具有相同出口面积的圆孔喷口和狭缝喷口自耦合射流激发器外部流场特征进行了实验研究.结果表明:狭缝喷口自耦合射流与圆孔喷口自耦合射流的形成过程相同

都经历了涡环产生、发展、破碎融合的周期性过程

在某个法向距离上形成较为稳定的连续性射流.时均流场分布表明狭缝喷口自耦合射流的流场型面较宽

扩展角度较大.狭缝短轴方向和圆孔水平方向上自耦合射流的时均速度曲线呈现规则的对称分布和速度自模的特征

而狭缝长轴方向自耦合射流在靠近喷口处的速度分布呈现马鞍状

这一特征随着法向距离增大而逐渐消失.

Abstract

The characteristics of flowfields of synthetic jets with slot-nozzle and hole-nozzle were investigated experimentally by utilizing Particle Image Velocimetry(PIV).The results show that: the formations of the synthetic jets from different-nozzles are the same.During the formation process

the rings of vortexes were generated

developed

broken down and merged together periodically

forming a steady jet within a certain normal distance near the orifice exit.The time-averaged flowfields of the synthetic jets were continuous and steady.However

the slot-nozzle synthetic jet appeared wider than the hole-nozzle synthetic jet with a bigger spreading angle.The velocity profiles of the slot-nozzle synthetic jet along the slot-width and the horizontal hole-nozzle synthetic jet appeared symmetrically and self-similarly.But

the velocity profiles of the slot-nozzle synthetic jet along the slot length direction took on a saddle shape and disappeared with the increase of normal distance from the nozzle.

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南京航空航天大学能源与动力学院江苏省航空动力系统重点实验室

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