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二维细长柱体气动力特性试验研究 预览

Experimental Study on Aerodynamic Characteristics of Two-dimensional Slender Cylinders
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摘要 为了研究包括圆柱体和正多边形的二维细长柱体的气动力特性,对具有5种不同表面粗糙度的圆柱体和4种正多边形(12、16、20、24)柱体进行了风洞模型测力试验。对于圆柱体,分析了雷诺数和表面粗糙度对其气动力特性影响规律;对于正多边形柱体,分析了雷诺数、风攻角以及正多边形边数对其气动力特性影响规律。结果表明:圆柱体表面粗糙度对气动力特性具有明显影响,随着粗糙度增大,阻力系数减小,雷诺数效应减弱;在特定风攻角下,各正多边形柱体气动力系数随雷诺数均变化不大;在试验雷诺数范围内,正多边形柱体的气动力系数随风攻角变化不大;就整体趋势而言,正多边形柱体随着边数增加平均阻力系数减小,平均升力系数增加。 In order to study the aerodynamic characteristics of two-dimensional slender cylinders consisting of circular section and regular polygon sections,a series of wind tunnel tests on circular section cylinders with 5 surface roughness and 4 regular polygon sections cylinders were conducted.For the cylinder with circular section,the influence of Reynolds number and surface roughness on its aerodynamic characteristics was analyzed.For the cylinder with regular polygon section,the influence of Reynolds number,wind attack angle and the number of edges on its aerodynamic characteristics was analyzed.The test results show that the surface roughness of cylinder has obvious influence on its aerodynamic characteristics.With the increase of roughness,the drag coefficient decreases and the Reynolds number effect weakens.The aerodynamic coefficients of polygonal cylinder has little changes with Reynolds number under the specific wind attack angle,and the aerodynamic coefficients of polygonal cylinder has little changes with wind attack angle within the range of experimental Reynolds numbers.From the overall trend,with the increase of the number of regular polygon edges,the average drag coefficient of polygonal cylinder decreases and the average lift coefficient increases.
作者 孙一飞 乔富贵 贾娅娅 刘庆宽 Sun Yifei;Qiao Fugui;Jia Yaya;Liu Qingkuan(School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;China Metallurgical Jingcheng Engineering Technology Co.,Ltd(Qinhuangdao),Qinhuangdao 066004,China;Institute of Structural Health Monitoring and Control,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;Key Lab of Structural Health Monitoring and Control of Hebei Province,Shijiazhuang 050043,China)
出处 《石家庄铁道大学学报:自然科学版》 2019年第2期10-15,共6页 Journal of Shijiazhuang Railway Institute
基金 国家自然科学基金(51378323,51308359,51108280) 河北省杰出青年基金(E2014210138).
关键词 二维细长柱体 粗糙度 气动力特性 雷诺数效应 2D slender cylinders surface roughness aerodynamic characteristics Reynolds number effect
作者简介 孙一飞(1993—),男,硕士研究生,主要从事桥梁抗风研究。E-mail:syf931124@163.com.
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