基于DES射流式涡发生器数值模拟研究  

NUMERICAL SIMULATION OF VORTEX GENERATOR JETS BASED ON DES

作　　者：胡昊[1,2] 李新凯[1] 王晓东[1] 康顺[1,3] 

机构地区：[1]华北电力大学电站设备状态检测与控制教育部重点实验室,北京102206 [2]华北水利水电大学电力学院,郑州450045 [3]西安现代控制技术研究所,西安710065

出　　处：《太阳能学报》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)

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.

关 键 词：射流式涡发生器 DES 数值模拟 吹风比 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]