轨枕式挡墙挡风沙功效的数值模拟及试验研究
Numerical simulation and experimental research on effect of sleepertyped retaining wall for wind and sand retaining

为了对轨枕式挡墙挡风沙功效进行系统研究，从而为工程应用提供参考，基于FLUENT欧拉非定常模型，对不同孔隙率的轨枕式挡墙进行三维数值模拟研究和风洞试验研究。研究结果表明：挡墙孔隙率对挡墙迎风侧流场的影响主要体现在近地表和接近挡墙处，对背风侧涡流区等参数产生较大影响；随挡墙孔隙率增大，背风侧增速区范围变大，涡流区范围减小、位置后移、强度减弱，积沙量增大；若挡墙以防风为主要功能，采用较小孔隙率，可达到较好的防风与防积沙效果，若以阻沙为主要功能，采用25%~30%的挡墙孔隙率，可达到较好积沙效果。
As a systematic research on the effect of sleeper typed retaining wall for wind and sand retaining, to provide a reference for the engineering application, the sleeper typed retaining wall with different porosity was simulated, and studied by wind tunnel test based on the FLUENT model. The results showed that: The influence of wall porosity to the windward side flow is small, but large to the vortex parameters in the leeward side; With the increase of porosity, the range of growth area in leeward side increases, the vortex zone reduces and moved backward and weakened while the intercepted sand increases; In addition, if the wall is mainly for wind-breaking, using small wall porosity is better for weakening wind and reducing intercepted sand, but if it mainly for sand resistance, using porosity of 25%~30% can achieve better effect of intercepting sand