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驻涡燃烧室采用凹腔结构稳定火焰,研究凹腔内不同燃料与空气喷射情况下的流场结构非常重要。采用粒子成像测速仪(PIV)测量了驻涡燃烧室凹腔在不同主流速度下的流场,并对比分析了凹腔进气结构分别为不开冷却缝及油气渗混孔、开冷却缝不开油气渗混孔、开冷却缝和后体油气渗混孔、开冷却缝和前体油气渗混孔时的流场结构。研究结果表明,不同主流速度下所设计的不同凹腔进气结构均能在腔内形成稳定的涡,冷却缝对流场的影响较小,凹腔油气掺混孔在开孔截面上对流场及涡核中心位置的影响较大。
It is very important to study the flow field structure under different fuel and air injection conditions in the cavity by using the cavity structure to stabilize the flame in the combustion chamber. The flow field of the cavity in the stationary vortex combustor at different main velocity was measured by particle image velocimetry (PIV). The air inlet structure of the cavity was analyzed as follows: Open the oil and gas infiltration hole, open the cooling seam and the back of the oil and gas infiltration hole, open the cooling seam and the precursor oil and gas infiltration hole when the flow field structure. The results show that different cavities with different main flow velocities can form stable vortices in the cavity, and the influence of the cooling seam on the flow field is small. The cavity mixing holes in the cavity flow in the cross section Field and vortex core location of the greater impact.