【摘要】 通过对不同工程措施下风沙流中风速脉动特征与输沙量波动研究发现:不同孔隙度栅栏中各高度层瞬时风速的波动性具有很好的相关性,而且相邻高度之间的相关性非常显著。在不同风速下,典型工程措施中同一高度层输沙量具有相对应的变化特征;瞬时风速的波动性主要与其所在高度层沙粒的运动状态和工程效益有关。更多还原

【Abstract】 Study on relation of wind speed fluctuation with sand transport rate was conducted in wind tunnel under condition of different engineering measures.The fluctuating characteristics of instantaneous wind speed with time are well correlative between different heights in sand barriers,especially between neighboring heights.As the space between different heights increases,the synchronism of instantaneous wind speed fluctuation presents a decreasing degree.The fluctuating amplitude of instantaneous wind speed is closely related to both the character of underlying surface and the motion state of sand grain and sand transport.更多还原