摘要
提出了一种新型燃气轮机涡旋式喷嘴,这种喷嘴相对于传统的具有固定的涡旋数的喷嘴而言,其特点就在于能在相同的Re数下得到不同的涡旋数,因此,在低负荷的情况下更加有利于燃料的燃烧。对喷嘴的结构以及流场特性进行了深入探讨,同时,还对不同的涡旋数下,流场内的中心回流区及湍流强度分布特性进行了分析和讨论。进一步的模拟及实验研究还有待进行,以描述由这种涡旋式喷嘴产生的流体动力特性及其如何影响燃烧过程。
A new swirler for gas turbine combnstors is presented in this work. The significant advantage of such swirler against contemporary configurations, which have constant swirl numbers,is the ability to vary the swirl number at a same Reynolds number. It is quite suitable for the combustion of the fuel at low turbine operating loads. The geometry of the swirler and flow pattern are described in details in the present work. In the meanwhile, the results of four numerical simulations are presented and discussed to study the central recirculation zone and turbulence intensity at different swirl numbers. However,further numerical and experimental studies are necessary to be carried out in order to characterize the flow dynamics produced by the novel swirler and its impact on the combustion process.
出处
《汽轮机技术》
北大核心
2010年第2期120-122,共3页
Turbine Technology
