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采用PIV(particle image velocimetry)技术,对凹腔供油位置不同时凹腔内的冷态流场进行对比研究.通过分析不同来流速度对腔内涡的形成及其稳定性的影响,从而研究不同供油位置对涡稳定的影响.实验表明,供油位置在凹腔前体,油气掺混孔处的射流对涡有破坏,供油位置在凹腔后体,油气掺混孔处射流对涡没有破坏作用,在不考虑供油方式等因素的情况下,凹腔后体供油优于凹腔前体供油.研究结论可为该驻涡燃烧室进一步的热态燃烧性能实验研究提供依据.
The PIV (particle image velocimetry) technique is used to compare the flow field in different cavities when the cavity oil supply position is different. By analyzing the influence of different flow velocities on the formation and stability of vortices in cavities, Different oil supply positions on the stability of the vortex.Experiments show that the fuel supply position in the cavity precursors, oil and gas mixing holes at the jet vortex vortex damage, the fuel supply position in the concave cavity, oil and gas mixing holes at the jet The vortex has no destructive effect, and the fuel supply to the rear cavity is better than that of the cavity precursor irrespective of factors such as the mode of oil supply.Conclusions can provide the experimental study of further thermal combustion in the vortex chamber in accordance with.