Experimental study of wind load on tree using scaled fractal tree model

被引：4

作者：

Chan, Woei Leong ^{[1
]}

Cui, Yongdong ^{[1
]}

Jadhav, Siddharth Sunil ^{[1
]}

Khoo, Boo Cheong ^{[1
]}

Lee, Heow Pueh ^{[2
]}

Lim, Chi Wan Calvin ^{[3
]}

Gobeawan, Like ^{[3
]}

Wise, Daniel Joseph ^{[3
]}

Ge, Zhengwei ^{[3
]}

Poh, Hee Joo ^{[3
]}

Raghavan, Venugopalan ^{[3
]}

Lin, Ervine Shengwei ^{[4
]}

Burcham, Daniel Christopher ^{[4
]}

机构：

[1] Natl Univ Singapore, Temasek Labs, 5A Engn Dr 1,09-02, Singapore 117411, Singapore

[2] Natl Univ Singapore, Dept Mech Engn, 9 Engn Dr 1,Block EA 07-08, Singapore 117575, Singapore

[3] ASTAR, Fluid Dynam Dept, Inst High Performance Comp, 1 Fusionopolis Way,16-16 Connexis, Singapore 138632, Singapore

[4] Singapore Bot Gardens, Natl Pk Board, Ctr Urban Greenery & Ecol CUGE, 1 Cluny Rd, Singapore 259569, Singapore

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS B | 2020年 / 34卷 / 14-16期

基金：

新加坡国家研究基金会;

关键词：

Fractal tree model; wind load; Reynolds shear stress; turbulence kinetic energy; TURBULENT-FLOW STRUCTURE; TUNNEL MEASUREMENTS; DRAG RELATIONSHIPS; MOMENTUM;

D O I：

10.1142/S0217979220400871

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Green urbanism has stimulated more research on the aerodynamics of tree in recent years. The insight gained in studying wind load on trees would mitigate risk of tree falling and enable sustainable landscape planning. However, deciphering the effect of wind on trees is a daunting task because trees come in various species, shapes and sizes. In this study, we aim at conducting wind tunnel tests on various species of trees, including measuring the respective drag coefficient and turbulent flow field using a force balance and particle image velocimetry system. The wind tunnel experiment is conducted using scaled down fractal tree model at 10 and 15 m/s. The 3D-printed tree model is grown based on the data collected on the species-specific tree parameters, such as the height, trunk diameters, crown box dimensions, etc. In this paper, the wind tunnel result of Yellow Flame (Peltophorum pterocarpum) is presented. Results show that the drag coefficient for this inflexible tree model is not sensitive to wind speed. The Reynolds shear stress and turbulence kinetic energy are observed to be the largest at the top and bottom of the crown where the velocity gradients are the highest.

引用

页数：5

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