驻涡燃烧室凹腔供油位置对流场影响的PIV实验

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,油气掺混孑L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窜进一步的热态燃烧性能实验研究提供依据.

Experimental study on the influence of fuel supply position of concave cavity on the flow field in trapped vortex combustor by PIV

The flow field of cavity with fuel supply injection located at the forebody and afterbody in trapped vortex combustor (TVC) was studied using PIV testing technology. In order to study the influence of fuel supply position on the formation of vortex and vortex stability, different incoming flow velocity and fuel supply location was analyzed. The results show that, when the fuel supply position located at the forebody of cavity, the jet flow of fuel supply has certain degree damage to vortex, and when the fuel supply injection located at the afterbody of cavity, the jet flow of fuel supply has no damage to vortex. These results provides the foundmental proof for the further studies on the combustion properties of this TVC test rig .