Abstract:

To study the windproof effect of double-row nylon sand-blocking net-grass square combination， wind tunnel experiments of double-row nylon sand-blocking net-grass square lattice with porosity of 40%， 45%， and 55% were carried out， and the contours of wind acceleration rate， windproof efficacy， and wind contour indexes were investigated under the three kinds of wind speeds， namely， 6， 10 m·s^-1 and 14 m·s^-1. The results show that： （1） Under different wind speed conditions， the windproof effect of double-row nylon sand-blocking net-grass combination decreases significantly with the increase of the incoming wind speed. （2） The windproof effect of the combined use of double-row nylon sand-blocking net-grass squares using a porosity of 40% is relatively better， whereas the windproof effect is relatively poorer when using a porosity of 45%， and the worst is found in the case of the windproof effect of porosity of 55%. （3） There is a cumulation of windproof effects in the combined application of double-row nylon sand-blocking net-grass squares. Therefore， it is recommended that a 40% porosity double-row nylon sand-blocking net-grass square grid be used in combination with practical applications to obtain the best wind protection effect.

Key words: double-row nylon sand-blocking net, grass square, windproof effect, wind tunnel simulation