本文選題：通風 + 彎曲風道��； 參考：《地下空間與工程學報》2014年02期

【摘要】：在長大公路隧道通風系統(tǒng)中,經(jīng)常涉及到設置導流葉片的彎曲風道。本文首先對隧道通風系統(tǒng)彎道局部效應進行了探討,繼而采用有限元數(shù)值模擬方法系統(tǒng)研究了角度分別為30°、60°、90°的彎曲風道及含同心圓型、翼形、107°薄圓形、95°薄圓形導流葉片直角彎曲風道的局部阻力損失系數(shù),并將其計算結(jié)果與經(jīng)驗公式進行對比驗證,在此基礎上對公路隧道通風彎道設計參數(shù)進行了進一步優(yōu)化研究。研究結(jié)果表明:(1)直彎風道內(nèi)局部阻力損失系數(shù)與所設置的導流葉片類型及直彎參數(shù)(r/D)密切相關,不同類型導流葉片的設置只有對應特定的直彎參數(shù)(r/D)才能達到較好的導流效果;(2)采用角度為80°的彎曲風道取代設置導流葉片的直彎風道完全可行。
[Abstract]:In the ventilation system of long road tunnel, the curved air passage with guide blade is often involved. In this paper, the local effect of bends in tunnel ventilation system is discussed at first, and then the bending duct with angle of 30 擄~ 60 擄~ 90 擄and concentric circular type are studied systematically by using finite element numerical simulation method. The local resistance loss coefficient of the right angle bend duct of the airfoil is 107 擄thin circular and 95 擄thin circular guide vane, and the calculated results are compared with the empirical formula. On this basis, the design parameters of ventilation bend of highway tunnel are further optimized. The results show that the local drag loss coefficient in the straight wind duct is closely related to the type of the guide blade and the straight bend parameter (r / D). For different types of guide vane, it is feasible to use a curved duct with an angle of 80 擄instead of a straight curved duct with a specific straight bend parameter (r / D) to achieve a better diversion effect.
【作者單位】： 長安大學;新疆交通規(guī)劃勘察設計研究院;溫州市鐵路與軌道交通投資集團有限公司;
【基金】：交通部西部建設科技項目(2013 318 802 400)
【分類號】：U453.5

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本文編號：1903574