Study On The Influence Of Greening Modes On Outdoor Wind Environment

Greening has important effects on the outdoor wind environment quality, thebeautification and the pedestrian comfort. However, there are lots of researchers homeand abroad devoting to the issue and obtain different achievements, it gives someguidances to the design of outdoor wind environment. Based on this, a further study willbe conducted.Firstly, some research situations on greening model affect the wind environmenthave been analyzed and concluded at home and abroad，and then it put forward thenew research method after summarizing the predecessor’s experience of work，pointing the insufficiency in study.Secondly, the traditional CFD simulation theory has been summarized, after theanalysis of the green plant’s parameters, a new model parameters suit to the greening isadded based on traditional theory. It can ensure the accuracy of simulation results. Thebasic principle of the wind field is elaborated in detail, and the atmospheric wind profilein this paper is index wind profile. In order to provide a theoretical basis for the windtunnel experiment, the related criterionnumerals in wind tunnel experiment are analsized by the principle of similarity theory. According to the calculation results, all kindsof parameters of wind tunnel experiment are assigned.Thirdly, the influence facts on green plant to wind environment have beensimulationed by CFD software. The main parameters are: tree spacing, row number,porosity rate, planting mode and so on, as well as various correlations betweenparameters. On this basis, the influence of the greening plants to single buildingsurrounding and a housing estate wind environment. Compared it to the one withoutgreening plants to obtain the influence effect，especially the influence of trees andshrub to the wind environment of housing estate.Finally，with the wind tunnel experiment, the wind environment around thegreen plants and building below the atmospheric boundary are studied. The experiment verify the correctness of numerical simulation, and provide experimental foundation，At the same time，it shows that researching the influence of the greening on theoutdoor wind environment with CFD and wind tunnel experiment can obtain a moreaccurate and believable result.