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为了研究含导流片及钝体的驻涡燃烧室的最优结构,通过改变不同的导流片及钝体的尺寸和位置,对燃烧室的燃烧湍流流场进行了数值模拟。结果表明:钝体长度以及导流片与进口壁面的距离对燃烧室性能影响较大,其值越大,燃烧效率越高,最高可达到99.99%。在研究范围内,存在相对较优的钝体以及导流片结构,在该结构下,燃烧室的总压损失为6.66%,燃烧效率为99.79%。凹腔内形成稳定的双涡结构,钝体后方形成较好的回流区。
In order to study the optimum structure of the vortex combustor with deflector and bluff body, the turbulent flow field in the combustor is numerically simulated by changing the size and position of different deflector and bluff body. The results show that the length of the bluff body and the distance between the guide vane and the inlet wall greatly influence the performance of the combustion chamber. The larger the value is, the higher the combustion efficiency is and the maximum is 99.99%. Within the scope of the study, there is a relatively good bluff body and baffle structure, under which the total pressure loss in the combustion chamber is 6.66% and the combustion efficiency is 99.79%. Concave formation of a stable double vortex structure, blunt body behind the formation of a better reflux zone.