自耦合射流激励同向气流掺混的数值研究

针对同向两股气流掺混的某一特定物理模型,对自耦合射流作用下的气流掺混过程进行了数值模拟研究以揭示激励参数对于同向两股气流掺混的影响.与未施加自耦合射流激励的掺混过程相比.自耦合射流周期性的吹/吸诱导流场内产生复杂的大尺度涡系结构,使得同向两股气流形成对流型混合,有效缩减了主流核心区长度;随着自耦合激励器驱动频率和驱动振幅的增大,自耦合射流出口附近的涡强度增强,同向两股气流掺混效果得到有效改善.

Numerical investigation on two parallel flows mixing excited by synthetic jets

Numerical investigations on the two parallel flows mixing process excited by the synthetic jets were performed to understand the effects of synthetic jet excitation parameters on the mixing process. Compared to the mixing flow field without the synthetic jet excitation, the synthetic jets induce complicated vortex structure in the mixing flow field through the periodical blow-entrain action. These vortexes force the convective mixing between two parallel flows, which is helpful to shorten the primary flow core length. As the synthetic jet excitation frequency or excitation amplitude increases, the vortex intensity and the mixing effectiveness are obviously enhanced.