之前在台灣ㄧ直搞不懂什麼叫Induced Drag? 為什麼速度減少，阻力反而增加呢？直到昨天晚上看到ㄧ本書上的ㄧ段話，才恍然大悟！"Induced drag is inversely proportional to the square of the speed. If speed is decreased by half, induced drag increases fourfold. It is the major cause of drag at reduced speeds near the stall; but, as speed increases, induced drag decreases."
我還因此自己導出了ㄧ個公式（如圖，哎！以前讀書都沒這麼用功！）懂是懂了，不過公式是我自己記憶用的，錯了可別怪我喔！
如果上面說明不清楚，看ㄧ下以下的圖大概就清楚了吧？
1 comment:
Post a Comment