It is of practical significance for improving the thermal comfort of pedestrian areas,to quantitatively evaluate the effect of landscape green plants on wind environment 可 buildings in the architectural design stage.Combining with the lattice Boltzmann computational fluid dynamics method and the porous media model,the coupled simulation of boundary layer flow field-building-tree are carried out and key parameters are verified,and the tree blocking phenomenon is carried out for the wind speed acceleration phenomenon in the typical rectangular building layouts in the urban street area.The analysis results show that:the simulation method can reproduce the average wind speed and turbulence characteristics in the tree wake area that are consistent with the test;the penetration rate of trees based on different resistance coefficients has obvious influence on the wind shielding effect in the range of 1H～3H downstream of the leeward area of trees;the simplified cylinder model based on the principle of equivalence can conservatively calculate the wind resistance variation law of trees consistent with that of real trees;the trees with reasonable spacing on both sides of the building and the windward end can reduce the wind speed acceleration ratio on both sides of the rectangular building and the area of the acceleration area.The economic and reasonable tree layout scheme can optimize the comfort of the wind environment around the building and make the ventilation corridor unobstructed.The research results can be applied to the wind environment assessment of landscape vegetation,and provide a new calculation reference for natural ventilation design of green buildings in the scheme design stage.
rectangular buildingtreewind environmentlattice Boltzmannporous media modelwind-speed acceleration
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