摘要
为清晰了解驻涡燃烧室内流场的涡系分布,对中心驻体为67%燃烧室当量宽度的驻涡燃烧室流场,在驻涡腔无喷射和有喷射两种状况下分别进行冷态数值模拟,详细研究流场内旋涡分布情况。结果表明:流道前部存在4个影响很小、沿流动方向运动、分布于驻体与端壁角区的螺旋状旋涡;流道后部存在1个由2个旋涡构成、面积较大的回流区;流道中部的驻涡区旋涡情况复杂,在驻涡腔无喷射情况下,主流与驻涡区之间悬挂驻留2个稳定的驻涡,驻涡腔内存在不稳定且数目不确定的旋涡;当驻涡腔前驻体有喷射存在时,驻涡腔内形成4个均匀且稳定的旋涡.
To investigate the distribution of the vortex in trapped vortex combustor, cold numerical simulations have been carried out respectively under conditions of non-injection and injection in the trapped vortex cavity to examine the fluctuating fields of the trapped vortex combustor with the width of 67% center-body. Results show that there are four vortexes in the front of trapped vortex comhustor. Two vortexes form a eircumfluenee area in the back of trapped vortex. In the middle of trapped vortex combustor, two stability vortexes are located between the mainstream and the cavity, while existing complex vortexes with instability and uncertain numbers under condition of non-injection. There are four stable and uniform vortexes formed in the cavity with injection from the fore body. The results have decisive elfects on stable flame forming.
出处
《大连海事大学学报》
CAS
CSCD
北大核心
2009年第4期103-107,112,共6页
Journal of Dalian Maritime University
基金
国家自然科学基金资助项目(50676013)
关键词
驻涡燃烧室
涡系分布
旋涡稳定性
稳定火焰
trapped vortex eombustor
vortex distribution
vortex stability
stability flame
