摘要
为了探究风力发电机舱干粉灭火系统的喷射流动特性,根据1.5 MW风力发电机舱为原型建立仿真模型,应用Fluent软件的离散相模块,模拟并分析了不同的喷嘴形状及充装压力对风电机舱干粉灭火系统喷射颗粒运动轨迹的影响.模拟结果表明:随着喷嘴角度的增大,颗粒流动到两侧壁的总时间越短,颗粒流动到机舱两侧壁的总时间最短的是150°喷嘴,为12.9 s;随着充装压力越大,干粉的喷射速度越大,颗粒向侧壁扩散的速度也越快,充装压力为2.5 MPa时,颗粒流动到机舱两侧壁的总时间最短,为10.5 s.模拟结果可为风电机舱灭火系统的优化提供参考.
The purpose is to study the ejection and flowing characteristics of powder extinguishing system on wind turbine nacelle. Based on the prototype of 1.5 MW wind turbine nacelle, a simulation model was estab- lished. The effect of different nozzle shape and storage pressure to the ejected particles tracks of powder extin- guishing system on wind turbine nacelle were simulated and analyzed using the discrete phase module of Flu- ent. The result show that, the total time of particles move to both sides of the walls decreases with increasing angle of the nozzle. The shortest time of particles move to both sides of the walls is 150 degree nozzle 12.9 s; both the ejection velocity of powder and the diffusion velocity of particles move to the walls increases with increasing storage pressure. The shortest time of particles move to both sides of the wails is 2.5 MPa 12.9 s. The simulation results can provide reference for optimizing the powder extinguishing system on wind turbine nacelle.
出处
《哈尔滨理工大学学报》
CAS
2013年第1期109-114,共6页
Journal of Harbin University of Science and Technology
基金
黑龙江省科技厅科技攻关项目(GZ11A406)
关键词
风电机舱
离散相
喷射流动
喷嘴
充装压力
wind turbine nacelle
discrete phase
ejection and flowing
nozzle
storage pressure
