关键词: 两侧进气道;突扩燃烧室;三线流;流场;数值法和计算方案

Abstract: The three-dimensional gas flow field in a dual-inlet combustor and the axisymmet-rical gas flow field in an inlet-tube of this combustor are numerically simulated by using k-ε turbulence model and SIMPLE algorithm. The sudden expansion ratio of combust6r is 1. 1. The predicted results show that there is a slim recirculation zone behind the swirler of pre-combustor which is located inside the inlet-tube, and the recirculation zone is extended to the primary zone of the combustor. There is a small recirculation zone in the head part of the combustor. It can be concluded that the recirculation zone in the combustor cannot stabilize the flame, and other measures such as using a pre-combustor must be adopted to improve the flame stability.

Key words: Side-inlet;Dump combustion chamber;Three dimensional flow;Flow field;Numerical method and procedure