多孔파이프의 小孔으로부터의 流出에 관한 硏究 = A Study on the Efflux of Water from a Small Hole of the Perforated Pipe

국문 초록 (Abstract)

本 論文은 多孔파이프의 流出에 대하여 에너지 保存法則을 適用하여 解析한 白井의 諸 式및 計算値를 다른 角度에서 이를 分析하여 解析하였다. 이를 要約하면 아래와 같다.
1) 本 計算値는 白井의 試驗値와는 管徑(D)이 작고, 小孔(d)이 클수록 잘 一致하나 대체적으로 높은 값이다.
2) 白井의 計算値의 값이 本 計算値와 낮게 比較되는 것은 式 中의 H_f／3의 變化量과 小孔의 數(n) 및 小孔의 直徑(d)이 크게 관여하기 때문이다.
3) 一般的으로 多孔파이트는 管徑(D), 小孔의 直徑(d), 小孔의 數(n)와 잘 組合되며는 높은 流量比를 얻을 수 있고 이 것이 經濟的인 多孔管 設計와 直結된다.
4) 計算値와 實測値와의 差異는 管의 두깨(δ)에 따른 收縮係數에 起因하는바 될 수 있는 한 流量比를 높게하여 補正量을 줄인다.

다국어 초록 (Multilingual Abstract)

In this paper Shirai's date was explained to analyze for the efflux of water from a small hole of the perforated pipe.
The results obtained were summarized as follows;
1. Values of this paper coincided with Shirai's on condition that diameter of pipe was small and hole was large, but it generally was high.
2. Shirai's was low in comparision with this paper because it was concerned with number of hole, diameter of hole and Hf／3.
3. It was important for combination of each factor in order to design economically perforated pipe.
4. Difference between value of calculated and measured was caused by coefficient of constriction that was commanded by diameter of pipe, therefore ratio of the efflux of water from hole had to be high.