摘要
为研究预混燃烧对湍流影响的机理,采用粒子成像测速技术对丙烷/氧气预混燃烧流场进行了测量。测量结果表明,热态燃烧流场的射流扩展区域比冷态射流流场的宽,而且沿着射流方向热态射流速度衰减比较慢,燃烧造成的高温气体膨胀对射流的影响作用是显著的;热态燃烧流场的湍流度要比冷态射流流场的大,由此可知燃烧造成的火焰脉动导致流场的湍流度增大。
The flow field of propane/oxygen pre - mixing combustion was measured using particle image velocimetry to study the influence mechanism of pre - mixing combustion to the turbulence. Experimental results show that the extended area of combustion flow field is wider than the cold jet flow field, and the combustion jet speed attenuation is slower along the jet direction, it is significant that the impact of burning gas expand to jet flow caused by high temperature; The turbulence intensity of combustion flow field is larger than the turbulence intensity of the cold jet flow field , thus it can be seen that combustin flame pulse lead to the turbulence intensity of flow field increased.
出处
《冶金能源》
2013年第2期21-24,共4页
Energy For Metallurgical Industry
关键词
湍流
预混燃烧
湍流度
PIV
turbulence pre - mixing combustion turbulence intensity PIV
