锅炉一次风速的准确测量是涉及锅炉启动调试、燃烧调整等方面 ,是关系到机组安全稳定经济运行的重要课题。通过对一次风管道内的流动状况进行数值模拟 ,揭示了复杂管道条件下的一次风流动特性 ,提出了一次风管道内的湍流模型 ,为准确测量一次风速提供了依据 The accurate measurement of the primary wind speed of the boiler involves the start-up and debugging of the boiler and the adjustment of the combustion. It is an important issue that relates to the safe, stable and economical operation of the unit. Through the numerical simulation of the flow conditions in the primary air duct, the primary air flow characteristics under complicated conditions are revealed, and the turbulence model in the primary air duct is proposed to provide a basis for accurately measuring the primary air velocity