摘要
1995年由美国代顿(Dayton)大学Hsu教授等提出的用驻涡稳定火焰是一种新型、高效、适应高性能发动机发展的火焰稳定技术。研究在借鉴国外研究成果的基础上,采用数值和实验两种手段开展了驻涡火焰稳定器流场特性,包括驻涡和压力特性的研究。研究结果表明:在本研究范围内(Da/Df=0.5～0.8)的每一个Da/Df,都对应于一个最佳的H/Df(0.2～2.0),空腔中的驻涡稳定,符合火焰稳定和燃料引入的要求,压力损失也最小。研究成果初步确定了驻涡火焰稳定器的基本结构参数,为开展热态研究打下基础。
In 1995,a new,compact and efficient method to stabilize flame,referred to as TrappedVortex concept,was introduced firstly by K.-Y.Hsu,a professor of Dayton University.For obtaining good performance characteristics in a trapped vortex combustor,the fluid dynamics should be studied in depth.On the basis of former research work,a numerical investigation and experimental research work were performed for understanding the relationship of trappedvortex characteristics and pressure loss varying with the diameter afterbody (Da) and the length of centerbody (H) under cold environments when the diameter of forebody and the inlet annular velocity are fixed at Df=70 mm and Ma=03 respectively.The results show that within the range of Da/Df=05～08,each value of Da/Df corresponds to a specific optimal H/D (02～20),when a stable vortex is trapped in the cavity.The characteristics of this trapped vortex,mainly the vortex core and vortex area,meet the requirements for the injection of fuel and primary air introduction.In addition,a minimum pressure drop is achieved across the combustor.
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2002年第5期567-571,共5页
Journal of Aerospace Power
