【摘要】 为计算非预混式旋流燃烧器的燃烧特性,建立了非预混强旋流燃烧过程模型,然后对两种不同结构形式的燃烧器进行了数值模拟,并在一个热态模型试验台上进行了相关燃烧试验,测量了热力参数并将参数与计算结果进行对比。结果表明:采用两种燃烧器的燃烧室中高温区域都呈现双峰型分布,炉中心存在回流区域,此处轴向速度较小。燃烧器采用交叉与旋流相结合的形式比单纯采用旋流的形式,其气体燃烧速率更快,而且燃烧室中高温区域的体积更大、气流更均匀。试验结果与计算结果吻合较好,该方法可用于各种非预混燃气式燃烧器的燃烧计算。更多还原

【Abstract】 Established was a mathematical model for calculating the combustion characteristics of a non-premixed type swirling burner and then,numerically simulated were two burners with different structures with relevant combustion tests being conducted on a hot-state model test rig and the thermal parameters being measured and compared with the calculation results.The research results show that the high temperature zones in the combustion chamber of both burners all assume a dual peak type distribution and there exist return flow zones in the center of the furnaces where the axial speed is relatively small.The gas combustion speed of the burner with a structure integrating a cross flow and a swirling one will be quicker than that with a structure adopting a single swirling flow and the high temperature zone in the combustion chamber will have a larger volume and an even more uniform flow.The test results are in relatively good agreement with the calculation ones.The method under discussion can be used for calculating the combustion of various non-premixed type burners.更多还原