低雷諾數(shù)條件下并列三圓柱繞流的尾流模式和水動(dòng)力系數(shù)研究
發(fā)布時(shí)間:2018-08-07 12:05
【摘要】:該文應(yīng)用浸入邊界法對(duì)雷諾數(shù)Re(28)100和間距比T/D(28)1.1-5.0條件下的等間距并列三圓柱繞流進(jìn)行了數(shù)值模擬。研究發(fā)現(xiàn),尾流模式與無(wú)量綱圓柱間距比T/D密切相關(guān),在所研究的間距比范圍內(nèi)共出現(xiàn)六種尾流模式,分別為:單體尾流模式(T/D(28)1.1-1.2)、偏斜尾流模式(T/D(28)1.3)、第一類Flip-Flopping(FF1)尾流模式(T/D(28)1.4-1.5)、第二類Flip-Flopping(FF2)尾流模式(T/D(28)1.7-2.3)、同步尾流模式(T/D(28)2.5-3.2)和調(diào)制尾流模式(T/D(28)3.3-5.0)。通過(guò)分析近尾流的渦量圖、升阻力系數(shù)時(shí)程曲線和不同圓柱所受升力的相位差,詳細(xì)研究了各個(gè)尾流模式的特點(diǎn)和聯(lián)系。
[Abstract]:In this paper, the numerical simulation of the flow around three circular cylinders with equal spacing under Reynolds number re (28) 100 and spacing ratio T / D (28) 1.1-5.0 is carried out by means of immersion boundary method. It is found that the wake mode is closely related to the dimensionless cylinder spacing ratio T / D, and there are six wake modes in the range of the studied spacing ratio. They are: single wake mode (T / D (28) 1.1-1.2), skew wake mode (T / D (28) 1.3), Flip-Flopping (FF1) wake mode (T / D (28) 1.4-1.5), Flip-Flopping (FF2) wake mode (TD / (28) 1.7-2.3), synchronous wake mode (T / D (28) 2.5-3.2) and modulated wake mode (T / R (28) 3.3-5.0). By analyzing the vorticity diagram of the near wake, the time history curve of the lift resistance coefficient and the phase difference of the lift force of different cylinders, the characteristics and relations of each wake model are studied in detail.
【作者單位】: 天津大學(xué)水利工程仿真與安全國(guó)家重點(diǎn)實(shí)驗(yàn)室;
【基金】:國(guó)家自然科學(xué)基金創(chuàng)新研究群體科學(xué)基金(51321065);國(guó)家自然科學(xué)基金(51579715)資助項(xiàng)目~~
【分類號(hào)】:O357.5
本文編號(hào):2169968
[Abstract]:In this paper, the numerical simulation of the flow around three circular cylinders with equal spacing under Reynolds number re (28) 100 and spacing ratio T / D (28) 1.1-5.0 is carried out by means of immersion boundary method. It is found that the wake mode is closely related to the dimensionless cylinder spacing ratio T / D, and there are six wake modes in the range of the studied spacing ratio. They are: single wake mode (T / D (28) 1.1-1.2), skew wake mode (T / D (28) 1.3), Flip-Flopping (FF1) wake mode (T / D (28) 1.4-1.5), Flip-Flopping (FF2) wake mode (TD / (28) 1.7-2.3), synchronous wake mode (T / D (28) 2.5-3.2) and modulated wake mode (T / R (28) 3.3-5.0). By analyzing the vorticity diagram of the near wake, the time history curve of the lift resistance coefficient and the phase difference of the lift force of different cylinders, the characteristics and relations of each wake model are studied in detail.
【作者單位】: 天津大學(xué)水利工程仿真與安全國(guó)家重點(diǎn)實(shí)驗(yàn)室;
【基金】:國(guó)家自然科學(xué)基金創(chuàng)新研究群體科學(xué)基金(51321065);國(guó)家自然科學(xué)基金(51579715)資助項(xiàng)目~~
【分類號(hào)】:O357.5
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