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采用单方程雪相模型,利用CFD软件FLUENT及其UDF二次开发接口编程对单坡屋盖结构进行风致积雪数值模拟.通过不同跨度、不同风速、不同倾角的单坡屋盖模型研究屋盖表面积雪侵蚀沉积量随风速及倾角变化的关系,并拟合近似公式.利用本文建议的积雪分布系数公式得出某工况下单坡屋盖表面积雪分布,并与各规范值进行对比.本文结果显示单坡屋盖表面积雪不均匀分布较为严重.
Using single-equation snow-phase model, the numerical simulation of wind-induced snow cover is carried out by using CFD software FLUENT and its UDF secondary development interface programming.According to the single-slope roof model with different span, different wind speed and different inclination, The relationship between the snow deposition and the change of wind speed and inclination angle is fitted and the approximate formula is fitted.With the formula of snow distribution coefficient proposed in this paper, the snow distribution on the surface of single-slope roof under a certain working condition is obtained and compared with the standard values The results of this paper show that the uneven distribution of snow on the surface of single-slope roof is more serious.