【摘要】：采用風(fēng)洞試驗(yàn)與數(shù)值模擬相結(jié)合的方法對(duì)串列雙幅典型斷面(矩形斷面、Π型斷面及流線型斷面)三分力系數(shù)和斯脫羅哈數(shù)的氣動(dòng)干擾效應(yīng)進(jìn)行了研究。首先針對(duì)寬高比為5的單幅矩形斷面分別進(jìn)行了三分力系數(shù)的數(shù)值模擬和風(fēng)洞試驗(yàn)測(cè)試,數(shù)值模擬結(jié)果與風(fēng)洞試驗(yàn)結(jié)果吻合良好;然后對(duì)串列雙幅典型斷面不同間距比D/B(D為雙幅斷面之間凈間距,B為單幅斷面寬度)對(duì)應(yīng)的三分力系數(shù)及斯脫羅哈數(shù)進(jìn)行了數(shù)值模擬。研究顯示:上游斷面阻力系數(shù)與單幅斷面比較接近,下游斷面阻力系數(shù)則隨間距比D/B的增加而增加;上游斷面升力系數(shù)、升力矩系數(shù)脈動(dòng)根方差氣動(dòng)干擾因子明顯小于下游斷面升力系數(shù)脈動(dòng)根方差氣動(dòng)干擾因子,兩者均隨間距比D/B先增加后減小。
[Abstract]:By means of wind tunnel test and numerical simulation, the aerodynamic interference effects of three-component force coefficient and Sturoha number on a series of double typical cross sections (rectangular section, Pi section and streamlined section) are studied. First, the numerical simulation and wind tunnel test of the three-component force coefficient for a rectangular cross-section with a width-to-height ratio of 5 are carried out, and the numerical simulation results are in good agreement with the wind tunnel test results. Then the three-component force coefficient and Stirach number corresponding to different spacing ratio D B (D is the net spacing between two sections and B is the width of a single section) of two typical cross sections in series are numerically simulated. The results show that the resistance coefficient of the upstream section is close to that of the single section, while the downstream section resistance coefficient increases with the increase of the spacing ratio. The aerodynamic interference factor of fluctuating root variance of upstream cross-sectional lift coefficient and lift moment coefficient is obviously smaller than that of downstream cross-section lift coefficient fluctuating root variance, and both of them increase first and then decrease with the spacing ratio of D / B.
【作者單位】： 湖南大學(xué)土木工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(50608030,51178181) 湖南省高校創(chuàng)新平臺(tái)開(kāi)放基金項(xiàng)目(11K015) 湖南大學(xué)青年教師成長(zhǎng)計(jì)劃資助(2013)
【分類號(hào)】：U441.3

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