CAJ | 학술논문

应用 CFD 模拟软件 Fluent 6.2 对开孔率 30%的新型导流型防风网与传统方孔、圆孔平板网的受力与结构稳定性进行了研究.分析了不同风速下方孔、圆孔、导流型 3 种不同开孔型式网板受风荷载作用情况.模拟结果表明:导流型防风网受风荷载作用与传统方孔、圆孔网板相比差别不大,且风荷载都是随着风速不断加大,呈现二次方性增长,当风速由 3 m·s?1 增加到 15 m·s?1 时,风荷载增长约 20 倍;不同开孔网板的力臂与固定网高之比相差不大,且随来流风速增加变化不大;产生网板阻力的主要原因是网板近壁面的前后压差和网后气流湍动形成的拖曳涡.
응용 CFD 모의연건 Fluent 6.2 대개공솔 30%적신형도류형방풍망여전통방공、원공평판망적수력여결구은정성진행료연구.분석료불동풍속하방공、원공、도류형 3 충불동개공형식망판수풍하재작용정황.모의결과표명:도류형방풍망수풍하재작용여전통방공、원공망판상비차별불대,차풍하재도시수착풍속불단가대,정현이차방성증장,당풍속유 3 m·s?1 증가도 15 m·s?1 시,풍하재증장약 20 배;불동개공망판적역비여고정망고지비상차불대,차수래류풍속증가변화불대;산생망판조력적주요원인시망판근벽면적전후압차화망후기류단동형성적타예와.
The force and structural stability of new type deflector-porous fence and traditional flat-porous fence with square or circular hole and porosity of 30% for all the three kinds of fences were studied using CFD software Fluent 6.2. The results showed that there was no obvious increase about wind load between deflector-porous fence and tradition ones, and the wind-load increased with increasing wind speed, showing a quadratic growth. The wind-load growth about 20 times when wind speed increased from 3 m·s?1 to 15 m·s?1. There was no obvious difference of the ratio of force arm and fixed fence high among different fences and little change with increasing wind velocity. The main reason of the formation of porous fence resistance was the different pressure before and after fence and the development of trailing vortex turbulence.