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以高温蓄热式加热炉为例,运用Fluent软件,研究了烧嘴喷口间距对炉内温度场、流速场分布的影响。研究结果表明:当烧嘴喷口间距增大时,虽然天然气和空气更容易扩散到整个炉膛燃烧,但是若距离增大到超过一定的程度,射流的偏转角度也会增大,造成炉内流速分布不均匀,降低炉膛内的平均温度,同时还会推迟天然气和空气混合,造成燃料燃烧不完全。当烧嘴喷口间距为450 mm时,炉内平均温度最高,而且温度分布最均匀。
Taking high-temperature regenerative heating furnace as an example, the influence of the nozzle spacing on the temperature field and velocity field in the furnace was studied by Fluent software. The results show that when the nozzle spacing increases, although the natural gas and air more easily spread to the combustion chamber, if the distance increases more than a certain degree, the deflection angle of the jet will increase, resulting in the distribution of velocity in the furnace Uneven, reducing the average temperature inside the furnace, but also postpone the natural gas and air mixture, resulting in incomplete combustion of the fuel. When the burner nozzle spacing of 450 mm, the highest average temperature inside the furnace, and the temperature distribution of the most uniform.