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对中心驻体式驻涡燃烧室而言,适当的前驻体后端面几何变形可以为驻体间驻涡提供更加良好的遮蔽条件,有利于驻涡形成和稳定,弱化旋涡之间干扰,增强旋涡分布的均匀性。采用数值模拟方法在冷态条件下研究了9种后端面造型的流场,详细研究驻涡腔内部的流动特性,发现中心后凸形端面造型时流场总压损失低,驻涡腔内旋涡稳定且分布合理、均匀,研究结果可为设置前驻体喷射提供依据,为组织和利用旋涡结构稳定火焰提供帮助。
For the central stationed vortex chamber, the proper geometric deformation of the rear end face of the former can provide more favorable shielding conditions for the entrapment vortex, which is beneficial to the formation and stabilization of the entrapment vortex, weakening the interference between the vortices and enhancing the vortex Distribution of uniformity. The numerical simulation method was used to study the flow field of nine kinds of rear face shapes under cold conditions. The flow characteristics inside the vortex chamber were studied in detail. It was found that the total pressure loss in the flow field was low when the center kink face was formed. Stable, well-distributed and uniform. The results of the study can provide a basis for the setting of the pre-plant jet, and help to organize and utilize the vortex structure to stabilize the flame.