高温低氧燃烧炉内等温流场特性的数值分析

应用自行开发出的计算程序对高温低氧燃烧模型实验炉进行了三维等温流场的数值模拟·在燃料和空气的射流速度比分别取 3种不同值时 ,预报了炉内 3种典型的等温流场结构 ,分析了炉内多股射流间的相互作用及回流流动等流场特性·模拟结果表明 :在几何参数一定时 ,选择燃料和空气的射流速度比为同一数量级时 ,炉内的回流流动可以实现燃烧所需的低氧气氛 ,燃气射流能够利用这一低氧气氛实现高温低氧燃烧·数值预报结果与相关的实验观测基本符合·

Numerical Analysis of Isothermal Flow Velocity Distribution in High Temperature Air Combustion Furnace

The three-dimensional distribution of the velocity value of isothermal flow in high temperature air combustion furnace was numerically simulated with a authors developed computer program. Three types of isothermal flow configuration were forecasted under the conditions of three different velocity ratios of fuel to air inject. The flow field properties of the inter-action among multi-injections and the recirculating flow were analyzed. It is shown that, under certain geometry parameters, the lower oxygen concentration in recirculating flow can be obtained in the furnace by selecting proper velocity ratio of fuel to air jet in same scalar level. The simulating conclusions are in agreement with the results of experimentation.