Development of safe hydrogen combustion technology and investigation of its combustion characteristics

在本研究中，我们开发了一种新型的安全小型氢燃烧器，称为旋风射流燃烧器，它由一个涡流先导火焰稳定的射流扩散火焰组成。旋流射流燃烧室在射流火焰喷灭条件下对氢火焰进行了安全稳定。射流火焰与中间火焰之间存在最低温度区域，影响火焰的稳定。最低温度区域的移除对于稳定状态的扩展是必不可少的。因此，环形空气喷射喷嘴被多端口空气喷嘴取代。从而完全消除了最低温度区域，极大地扩大了稳定条件。

In this study, we had developed a new safe small hydrogen combustor, called the cyclone jet combustor, which consists of a jet diffusion flame stabilized by a swirl pilot flame. Hydrogen flames are safely stabilized by the cyclone jet combustor over the blowout condition of jet flame. There exists the minimum temperature region between the jet flame and the middle flame, which affects the flame stabilization. The removal of the minimum temperature region is essential for the expansion of the stable condition. Thus, the annular air jet nozzle was replaced with a multi-port air nozzle. Thereby, the minimum temperature region was completely removed to expand the stable condition extremely.