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中文摘要：
撞击流技术由于其独特的相间传递特性，吸引了众多学者对其进行理论和实验研究，并已广泛应用在气化、混合、吸收、萃取、超细粉末的制备等领域。在两喷嘴对置撞击流中，一个很重要的现象是撞击面的不稳定性。目前对于撞击流不稳定性的研究多为轴对称撞击流。Stan等在运用LDA和可视化研究两股轴对称湍流水射流时，
英文摘要：
The oscillation characteristics of two planar opposed jets were studied by using high-speed camera, smoke wire visualization and hot wire anemometry （HWA） . The oscillation periods of two planar opposed jets at different nozzle separations and exit nozzle velocities were studied. The results showed two models of instabilities, streamwise quasi-periodic oscillation model and deflection oscillation model. The oscillation model was mainly streamwise quasi-periodic oscillation model at L〈5H （where L was the nozzle separation and H was the nozzle slot height）, and it was mainly deflection oscillation model at L〉5H. The deflection oscillation model had a stable period which decreased with increasing normalized nozzle separation.
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