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高中物理課本第二册中曾論述在流體中運動的物體受到的阻力,為了配合此段教學,我校教學小組設計了一件演示儀器,用於查驗流動的氣體作用於不同形狀的物體上的阻力。今將實驗器的製法和用法介紹如下。 (一) 型體的製造:取球體、半球體(可以兩用,球面向前和平面向前)、圓板體和流線體為範例,查驗流動的空氣對於它們的阻力的不同。各式型體均由木料製成,直徑相等(約為6厘米),圓板體厚2厘米,流線體長12厘米,各帶長6厘米、寬2厘米的薄板當作把柄,用以插在指桿的下面。前三型體容易製造,無須介紹,今祇略述流線體的制法。先仿照課本圖29(並参考流體力學書籍上的圖樣)所示的形狀在一厚紙板上描繪流線體縱剖面的輪廊,沿輪
In the second volume of the High School Physics Textbook, which dealt with the resistance to the movement of objects in the fluid, our teaching team designed a demonstration instrument to check the flow of gas acting on objects of different shapes resistance. This experiment will be the system of law and usage are as follows. (A) the type of body: take the ball, hemisphere (which can be dual-use, spherical forward and flat forward), circular plate body and streamlined body as an example, check the flow of air for their resistance difference. The various types of body are made of wood, the same diameter (about 6 cm), the circular plate body thickness of 2 cm, 12 cm long flow body, with a length of 6 cm, 2 cm wide sheet as a handle for Insert under the finger. The first three types of body easy to manufacture, no need to introduce, now only outline the system of streamline body. First, the shape of the textbook shown in Figure 29 (and with reference to the drawings on the fluid mechanics book)