引言 对于高速的气体或液体燃料的预混气流,其火焰稳定通常是采用钝体来实现的。钝体稳焰的机理可以用热理论模型、边界层点燃理论模型或搅拌反应器模型分别从不同的角度定性地给予解释。近年来劣质煤(或无烟煤)燃烧中采用钝体作为稳焰器来解决其着火延迟和火焰不稳定的问题收到了良好的效果,但对其稳焰机理尚不明确,仍然沿用 Introduction For the premixed gas or liquid fuel flow at high speeds, flame stabilization is usually achieved using bluff bodies. The mechanism of blunt body steady flame can be qualitatively explained from different perspectives with thermal theory model, boundary layer ignition theory model or stirred reactor model respectively. In recent years, low-quality coal (or anthracite) combustion using bluff body as a flamethrower to solve its ignition delay and flame instability problems received good results, but its steady flame mechanism is not clear, still in use