Please use this identifier to cite or link to this item: `http://hdl.handle.net/11455/72288`
 標題: 煙囪式出流口滯洪壩流量公式之實驗研究 作者: 陳正炎洪耀明黃宏信 關鍵字: 白努利方程式;有效流量係數;煙囪式出流口 出版社: 國立中興大學工學院;Airiti Press Inc. Project: 興大工程學刊, Volume 10, Issue 3, Page(s) 47-55. 摘要: The theoretical and experimental analysis were used for this researchto investigate the discharge formula of detention dam with chimney outlet onhillslope. The outlet control section combine upper rectangle with inferiortrapezoid. Theoretical discharge formulas were obtained from Bernoulli'sequation, with the effective discharge coefficient for adjustment. Effectivedischarge coefficient and experimental discharge formulas were obtained by usingthe experiment of different chimney outlets. Under 5% channel bed slope, thedischarge formulas of compound outlets with metric system are outlined asfollows:(1) The water depth fall into trapezoidal sectionQ=2/3(0.505)2g ｛ bh-4/5mh ｝（ 0 ≦ h ≦ p ）(2) The water depth above trapezoidal sectionQ=2/3(0.505)2g ｛ bh-4/5m 〔 h+(h-p) 〕｝（ p < h ≦ H ）where Q(cms) is the discharge of outlet, h is the water depth of outlet, g isgravitational acceleration, b is the breadth at bottom of trapezoidal section, pis the height of trapezium, side slopes of m (horizontal): 1 (vertical) of thetrapezoidal section, H is the height of outlet control section.本文旨在針對山坡地滯洪設施中，有關煙囪式出流口之流量公式做理論與實驗之研究。所用之出流口係採上方矩形下方梯形斷面形狀之設計，並依據白努利方程式解析，引入有效流量係數 Ce 為校正參數，推得理論流量公式；再配合不同梯形開口尺度進行渠槽試驗，推算有效流量係數，提出實驗室經驗流量公式，期為山坡地開發設置滯洪設施之設計參考。經由理論推導與實驗數據分析，獲致在渠床坡度 5% 之煙囪式出流口公制流量公式如下：（１）當水深位於梯形斷面內時Q=2/3(0.505)2g ｛ bh-4/5mh ｝（ 0 ≦ h ≦ p ）（２）當水深高於梯形而達矩形斷面時Q=2/3(0.505)2g ｛ bh-4/5m 〔 h+(h-p) 〕｝（ p < h ≦ H ）式中Ｑ（ cms ）為出流口流量，h 為出流口水深， g 為重力加速度，b、p、m 分別為梯形斷面之底寬、高度及側坡水平比值，H 為出流口斷面最大高度。 URI: http://hdl.handle.net/11455/72288 ISSN: 1017-4397 Appears in Collections: 第10卷 第3期工學院

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