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基于高温煤气燃烧特点和对煤气燃烧器的要求,本研究提出了一种新型煤气燃烧器,并建立了冷态试验台架,利用等温模化方法将燃烧器内部结构及运行工况对流场分布的影响进行了冷态试验。试验表明:叶片的旋流角度为60°时比45°和30°时产生的旋流强度大,有利于高温煤气与配风在燃烧室内的旋流混合效果,但同时旋流衰减也在加快;此外,具有8个叶片的燃烧器比6叶片燃烧器的旋流效果好,但流场阻力大;中心风量从额定工况的0.8倍增加到1.2倍时,旋流对直流的影响减弱,有利于火焰形状的改变;叶片到喷口的距离从65mm减小到零时,旋流效果变的明显,有利于气流混合。冷态试验结果对该燃烧器的优化设计和进一步热态试验提供借鉴和参考。
Based on the characteristics of high-temperature gas combustion and the requirements of gas burners, a new type of gas burner was proposed in this study. A cold-state test rig was set up to simulate the internal structure and operating conditions of the combustor against the flow field The effect of distribution was tested cold. The results show that the swirling intensity of the swirling flow at 60 ° is larger than that at 45 ° and 30 °, which is beneficial to the swirling mixing effect between high temperature gas and gas distribution in the combustion chamber. At the same time, the swirling flow attenuation is also accelerating In addition, the combustor with 8 blades has a better swirling effect than the 6-blade combustor, but the resistance of the flow field is large. When the center air volume increases from 0.8 times of the rated working condition to 1.2 times, the influence of the swirling flow on DC is weakened, Is conducive to changes in the shape of the flame; blade to the spout to reduce the distance from 65mm to zero, the swirling effect becomes obvious, is conducive to air flow mixing. Cold test results provide reference and reference for the optimal design of the burner and further hot state test.