大功率合成射流激励器设计及其流场特性研究

Design of high-power synthetic jet actuator and its flowfield investigation

关键词:  大功率激励器+  优化设计  涡对+  出口速度+

Key words:  High-power actuator+  Optimum design  Vortex pair+  Exit velocity+

摘要:

为探寻新型高效的主动流动技术型式,对一种大功率合成射流激励器流场进行了详细的二维非定常数值模拟,并在此基础上进行优化设计研究,以期提高其作功能力和作功效率。结果表明,在激励器模型和有关参数不变的情况下,转速越大,激励器作用效果越明显;随着活塞位移增大,出口平均速度和最大速度都增加;在进行激励器设计时孔口段长度需要优化;激励器出口缝宽并不是越小越好。

Abstract:

The flowfields surrounding a high-power synthetic jet actuator was simulated numerically in detail.To seek for the novel active-flow-control method,optimization design was also carried out to improve the controlling ability and efficiency.With the invariable model and concerned parameters,the actuator becomes more desirable as the rotating speed increases.Average velocity and maximal velocity at the actuator exit increase as the piston displacement enlarges,which show that the actuator is more efficient.The length of exit section needs optimization.The actuator does not always exhibit good performance with the narrower exit.In the actual design,the various factors need to be considered.