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題名 | 狼尾草終端速度之測定=The Measurement of Terminal Velocity for Napier Grass |
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作者 | 陳添福; 連振昌; | 書刊名 | 嘉義技術學院學報 |
卷期 | 59 1998.08[民87.08] |
頁次 | 頁15-31 |
分類號 | 437.113 |
關鍵詞 | 狼尾草; 終端速度; Napier grass; Terminal velocity; |
語文 | 中文(Chinese) |
中文摘要 | 本研究之目的乃以狼尾草為研究對象,使用一直立風洞裝置,改變不同長度的狼 尾草莖及氣流速度,藉由應變規量測並轉換成狼尾草莖所承受之阻曳力,再由理論公式計算 出終端速度,以做為狼尾草青割收穫氣力輸送機之設計依據。由本研究的試驗數據及分析結 果,在牧莖含水率為78.4%時,得到牧草莖終端速度V□ (m/s)對重量W(g)及投影面積A(10□ mm□)之關係為: V□=11.027+4.2583 W – 2.2062 A。 |
英文摘要 | The agricultural material of this study is napier grass. A vertical wind tunnel equipment was installed to measure the terminal velocity V□ of napier grass stem with different length. The drag force D□ of napier grass stem was measured by strain gage. The terminal velocity of napier grass stem was calculated through the drag force D□ and air velocity square V□. The results were used for the design basis during pneumatic transportation for harvesting. The data was analyzed by multi-linear regression method. When the moisture content of napier grass is 78.4, (the experience formula is Vt=11.027 + 4.2583 W – 2.2062 A Where W (g) is the weigh of napier grass stem, A (10□mm□) is the projection area of naper grass stem. V□ (m/s) is the terminal velocity of napier grass stem. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。