关键词: 自耦合射流, 流动特性, 数值模拟, 动网格

Abstract:

Experimental study and numerical simulation were used to study the flow characteristics of a synthetic jet. The results show that: near the slot exit, pairs of vortexes are generated, broken down and merged together periodically, forming the continue jet at one normal distance near the slot nozzle. And during the development, the synthetic jet spreads rapidly in the short axis direction, this means the weaker strain of the side synthetic jet. Comparing with the constant jet, the velocity profiles of the synthetic jet is self-similar in the short axis direction, While in the long axis direction, the synthetic jet contracts firstly and then spreads slowly. Near the nozzle, the velocity distribution on the slot length is like a saddle while with the distance far away it disappeares.

Key words: synthetic jet, flow characteristics, numerical simulation, dynamic mesh