摘要
Banki式风机是一种适合在低风速下运行的小型风机,但其在迎风方向存在负力矩,整体效率不高的问题,为此提出了在迎风方向上安装一个弧形导流板的方案。为了探索导流板对风机气动性能的影响机理,并定量分析导流板对风机发电功率的影响,使用滑移网格技术对风机进行了二维非定常数值流体动力学仿真。仿真结果表明:导流板可减少叶轮在逆风半周期内的负转矩,提高风机的输出功率最高可达66.9%.
Banki wind turbine is a small wind turbine which is suitable for running at low wind speeds, but its overall efficiency is low because of the negative torque in the windward direction. An improved Banki wind turbine with an arc-type deflector baffle arranged in the upwind direction is proposed. In order to investigate the influence of the deflector baffle on the aerodynamic performances and power generation of the turbine, the two-dimensional unsteady flow of the turbine is computed by using sliding mesh. The results show that the deflector baffle can be used to reduce negative torque on the blades in the upwind half cycle, and the power coefficient of the turbine can be increased by 66.9%.
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2014年第8期1324-1328,共5页
Acta Armamentarii
基金
国家自然科学基金项目(51179159)
