| 摘要: | 本研究目的在於於現有教學實驗設備上自行設計製作開發新的實驗項目。研究乃以現有伯努力實驗設備為基礎，以其提供實驗所需之氣流、並進行氣流流量調節以及流量量測，再配合所設計製作之噴嘴、數個不同表面粗糙度但相同重量之保麗龍圓球、和圓球懸浮高度量測裝置，以完成一套可探討懸浮高度與表面粗糙度關係的實驗裝置。實驗結果一再顯示，當不同表面粗糙度的圓球，只要具有相同重量，則在相同的噴流雷諾數下，具有愈粗糙表面的圓球，懸浮高度愈高。本實驗設計提供了實證表面粗糙度與磨擦係數的正相關關係之例證。
This study aims at designing a new experimental article based on an existing Bernoulli theorem apparatus. The flow of air is produced, regulated, and measured by the original apparatus. A nozzle, a set of spheres with different surface roughness statuses, and an auxiliary device for measuring the height of suspended spheres were made. The capacity of the original apparatus is extended to demonstrate the frictional effect of the surface roughness. |
