請用此 Handle URI 來引用此文件:
http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/61071
標題: | 規則波中船模自推試驗之研究 Study on the Ship Model Self-Propulsion Test in Regular Waves |
作者: | Ting-Yu Yang 楊庭瑀 |
指導教授: | 蔡進發(Jing-Fa Tsai) |
關鍵字: | 波浪附加阻力,阻力試驗,規則波中自推試驗,船舶性能,馬力預估, added resistance in waves,resistance test,self-propulsion test in regular waves,ship performance,power prediction, |
出版年 : | 2021 |
學位: | 碩士 |
摘要: | 本研究主要進行規則波中阻力試驗及規則波中自推試驗並與靜水面的試驗結果進行比較,再推估實船性能,希望能藉由波浪中的實驗,使船模試驗的結果在預估實船性能時,更貼近實際海域的狀況。 試驗之船模為5.443米之漁船,在拖曳水槽中以拖車等速帶動並進行完整的阻力試驗、螺槳單獨性能試驗及自推試驗,另以巡航船速於規則波中進行附加阻力試驗及自推試驗,之後將各實驗結果進行比較分析與統整,內容包括不同頻率之波浪對於阻力增加的影響,及比較船模各項自推因子在各頻率波浪中與靜水中的不同。 由規則波中附加阻力試驗結果顯示:當波長約為船長之1.1倍時有最大之波浪附加阻力,且分析波浪中阻力的量測結果後發現,波浪附加阻力在各週期間為定值,因此可以使用穩定時的全程資料之平均值作為分析對象,將同樣概念套用至規則波中自推試驗,即可使用與靜水中自推試驗相同的系統及方法進行量測。規則波中自推試驗結果顯示浪中增加螺槳推力、浪中增加螺槳扭矩、浪中增加螺槳轉數及傳達馬力皆於波長約為0.9倍船長時有最大值,另外包括推減係數、跡流係數及各推進效率皆受到波浪影響而有顯著的變化,各項參數皆於波長約為0.9倍船長時與靜水中有最大的差異。 The resistance tests and self-propulsion tests were conducted in calm sea as well as in regular waves. The full scale performances of the ship at calm sea and regular wave conditions were predicted and compared in this study. It is hoped that the performance of the ship performance under actual sea conditions could be predicted more accurate by the resistance and self-propulsion tests in regular waves. The test ship model is a fishing boat of 5.443 meters. The resistance test, open water test, self-propulsion test in calm sea were conducted with six velocities. The wave added resistance test and self-propulsion test in regular wave were conducted only at the cruising speed for nine wave frequencies. The influence of waves on the increase of resistance and self-propulsion factors at the self-propulsion points were investigated. Through the measurement and analysis of the added increase in wave, it was found that the added resistance in wave converged to a constant value after the certain cycles. The wave added resistance could be calculated as the average value of the entire cycles of the measured data in a test run. The test results of resistance increase in regular waves show that there is the largest resistance increase when the wavelength is about 1.1 times the length of the ship. The calculation of RA is the same as in calm water due to the wave added resistance is constant for each wave frequency. Then procedure of the self-propulsion test in calm sea can be applied to the self-propulsion test in regular waves. The test results of self-propulsion test in regular waves show that the increase of the thrust, torque, revolutions and the delivered horsepower all have maximum values when the wavelength is about 0.9 times the length of the ship model. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/61071 |
DOI: | 10.6342/NTU202100464 |
全文授權: | 有償授權 |
顯示於系所單位: | 工程科學及海洋工程學系 |
文件中的檔案:
檔案 | 大小 | 格式 | |
---|---|---|---|
U0001-0302202117022700.pdf 目前未授權公開取用 | 3.1 MB | Adobe PDF |
系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。