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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。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;相对于在燃烧室单侧放置激励器的方式,双侧自耦合射流激励时温度均匀分布线较靠前;在燃烧室两侧放置激励器,自耦合射流轴向位置靠前时高温核心区小,随着激励器轴向位置的后移,高温核心区被逐渐拉长。
Aiming at a specific physical model of two airflows mixed in the same direction, the numerical simulation of airflow mixing process under the action of self-coupling jet was carried out. Comparing with the mixing process without self-coupled jet excitation, the complex large-scale vortex structures in the periodic blowing / sucking pilot flow field of the self-coupled jet make the convective-type mixing of the two air currents in the same direction reduced effectively The length of the mainstream core zone. Compared with the way in which the exciter is placed on one side of the combustion chamber, the temperature distribution line is more forward when the two-sided self-coupling jet is excited. The exciter is placed on both sides of the combustion chamber and the axial position of the self- When the high temperature core area is small, with the axial position of the actuator backward, high temperature core area is gradually elongated.