基于CFD技术的螺旋桨风机气流速度场数值模拟研究  

NUMERICAL SIMULATION OF AIR-VELOCITY FIELD OF PROPELLER FAN BASED ON CFD

作　　者：刘振东[1] 李源 喻磊[1] 毛树果[1] 孙艳军 

机构地区：[1]西安建筑科技大学土木工程学院,西安710055 [2]总后建筑工程研究所,西安710032

出　　处：《工程力学》2013年第6期346-352,共7页Engineering Mechanics

摘　　要：为了检测帐篷结构的抗风能力,需建立相应的吹风试验系统。采用标准k-湍流模型对拟建立吹风试验系统中螺旋桨风机的气流速度场进行了三维实尺度数值模拟。分析了单风机和不同轴心间距时双风机的气流速度分布规律。结果表明单风机气流速度峰值位于风机轴心线上,风速沿流向逐渐减小。双风机气流速度关于通过风机轴心连线中点的垂面呈对称分布,气流速度叠加范围沿流向逐渐增大,距风机出口越远,风速分布越均匀。在通过风机轴心的垂面之间,风速沿流向逐渐增大,至距风机出口13m^15m远处开始下降。双风机形成的气流速度在距风机12.2m远处的4m×7m矩形区域上分布均匀,风速值均大于20m/s。风机轴心间距为4m时,4m×7m矩形区域角点处均风速值较大。In order to detect the wind resistance of the tent structure, it was necessary to establish the corresponding blowing test system. 3-D air-velocity field of propeller fans in the blowing test system was simulated, based on the standard k-E turbulence model. The characteristics of air-velocity field of single fan and double fans under different axis spacing was analyzed. The results showed that the velocity peak of air-velocity field of single fan was located in the fan axis, and the wind velocity decreased gradually along the flow direction. Distribution of the air-velocity field of double fans was symmetrical, and the superimposed area of air-velocity increased gradually along the flow direction. In the areas that were farther away from the fan outlet, the wind velocity distribution was more uniform. In the area encircled with the planes that were through the axis of fans, the wind velocity increased gradually along the flow direction, while it begins to decline at the distance of 13m-15m. The air-velocity distribution of double fans was more evenly in the rectangular region of 4m-7m on the plane located 12.2m from fans, and the average wind velocity was higher than 20m/s. When the axis spacing was 4m, the wind speed at the comer of rectangular region of 4mx7m was larger.

关 键 词：帐篷结构 吹风试验 CFD模拟 螺旋桨风机 气流速度场 

分 类 号：TU312.1[建筑科学—结构工程]