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为了研究带导流片的先进旋涡燃烧室燃烧及流动性能,对导流片不同结构参数下燃烧室的流场分布、温度分布、总压损失、燃烧效率及污染物排放进行了数值模拟。结果表明,带导流片的先进旋涡燃烧室性能表现出明显的优越性,能够在不依赖凹腔射流的情况下形成理想的双旋涡结构,有利于增强凹腔稳焰及燃气掺混,大幅度提高燃烧效率,改善出口温度分布,降低NO排放。导流片结构参数对燃烧室性能影响呈现出一定的规律。当导流片伸入凹腔的长度与前钝体高度之比(a/B)为0.2,导流片到前钝体上端面的距离与燃烧室进气通道高度之比(b/H)为0.4,导流片到前钝体后端面的距离与凹腔长度之比(c/L)为0.1~0.2时,燃烧室在贫燃条件下可以实现低压降、低污染的稳定燃烧,而且出口温度分布均匀。
In order to study the combustion and flow performance of the advanced vortex combustor with guide vane, the flow field distribution, temperature distribution, total pressure loss, combustion efficiency and pollutant emission of the combustor under different structural parameters were simulated. The results show that the performance of the advanced vortex combustor with deflector shows obvious superiority, which can form the ideal double vortex structure without depending on the jet of the cavity, which is good for enhancing the steady flame and gas mixing in the cavity. Amplitude increases combustion efficiency, improves outlet temperature distribution, and reduces NO emissions. The influence of the structure parameters of the deflector on the performance of the combustion chamber shows a certain rule. When the ratio (a / B) of the length of the guide piece extending into the cavity to the height of the front bluff body is 0.2, the ratio (b / H) of the distance between the guide piece to the upper bluff body upper end surface and the height of the intake passage of the combustion chamber Is 0.4, and the ratio of the distance between the guide plate and the rear face of the front bluff body to the length of the cavity (c / L) is 0.1 to 0.2, the combustion chamber can achieve stable combustion with low pressure drop and low pollution under a lean burn condition, and Outlet temperature distribution.