摘要
为了更好应用射流式涡发生器抑制风力机叶片流动分离,采用分离涡(DES)方法对平板上射流式涡发生器流进行数值模拟,分析射流式涡发生器旋涡运动规律以及吹风比对射流孔下游湍流场的影响。通过对射流孔下游大尺度湍流相干结构研究表明,发卡涡及流向涡是射流湍流场中的典型相干结构,成熟发卡涡涡腿外侧诱导出的次生流向涡对近壁区能量的交换有着重要作用。对比不同吹风比时射流孔下游流场信息表明,吹风比越大,射流孔下游旋涡尺度越大,射流扰动范围越大,射流壁面摩擦力损失降低,但流场中压差损失变大。
In order to control flow separation of wind blade by vortex generator jets, vortex generator jets on flat were simulated based on DES, analysis of vortex movement of vortex generator jets at jet hole downstream, and the impact of the turbulence field at jet hole downstream with blowing ratio. The research of Large-scale coherent structures in turbulence at jet hole downstream showed that hairpin vortex and stream wise vortex is the typical coherent structure in turbulence field, the induced secondary flow vortex at outside of the hairpin vortex leg on near-wall region plays an important role in energy exchange. Comparison of flow field information at jet hole downstream with blowing ratio showed that blowing ratio increases, with the scale of vertex increases, the disturbance range of jet increases, and the loss of wall friction will reduc, but the pressure loss of flow field will increasee.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2015年第7期1671-1677,共7页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(51176046)
河南省重点科技攻关计划(142102210059)
关键词
射流式涡发生器
DES
数值模拟
吹风比
vortex generator jets
DES
numerical simulation
blowing ratio
作者简介
通信作者：康顺（1955-），男，博士、教授，主要从事叶轮机械内部流动分析及cFD可信度分析方面的研究。kangs@ncepu．edu．cn
