應用自航試驗系統推估規則波中之能源效率設計指標之研究

Experimental Study on Energy Efficiency Design Index in Regular Wave by Using Free Running Model Test

蔡易修(Yi-Hsiu Tsai)

指導教授 ： 蔡進發

國立臺灣大學/工學院/工程科學及海洋工程學研究所/碩士(2017年)

https://doi.org/10.6342/NTU201703702

摘要

本研究主要目的為利用自航船模試驗系統進行規則波中之自航試驗，再與靜穩海況之自推試驗結果比較可得船模於規則波中之速度降並求得能源效率設計指標。
試驗之船模以3.5米箭艏貨櫃船來進行，將進行規則波中之自航試驗，再與自推試驗以及規則波中之自推試驗做比較以得知拘束性試驗系統是否會對船模之運動造成影響。本研究之自航試驗系統能確保船模能以平擺角正負1度內以直線航行，並取得穩定速度下的船速、螺槳轉數、螺槳推力、螺槳扭矩、俯仰角、平擺角、螺槳減少之推力Ra等參數以推估實船之性能。
由規則波中之自推試驗結果顯示，其拘束式系統會造成推減係數過大且大於跡流系數，於推估實船性能時會有誤，故拘束式式試驗系統不適合用來進行波浪中之推進試驗。
由規則波中之自航試驗結果可求出實船於規則波中之速度降，並可計算出實船於規則波中之能源效率設計指標。

關鍵字

規則波中之自航試驗 ； 規則波中之自推試驗 ； 能源效率設計指標

並列摘要

The purpose of this research is to calculate the energy efficiency design index in regular wave by ship propulsion tests. The propulsion tests were conducted both in calm water and in regular wave by using the free-running model test system, and the propulsion performance and the speed loss in wave could be acquired in order to calculate the energy efficiency design index in regular wave.
The free running model can sail almost straight whether in calm water or in regular wave with yawing angle being no more than 1 degree. When the speed is stable, the model speed, rpm, thrust, torque of propeller, pitch angle and yawing angle were measured and be used to predict the propulsion performance of full scale ship and then the energy efficiency design index can be determined. Finally, the test results of self-propulsion test were compared with that of free-running model test. The result of self-propulsion test in regular wave shows that the thrust deduction is too high because of the captive model system, so the full scale performance can’t be predicted. The captive model system is not suitable for the ship propulsion test in wave.
The speed loss and energy efficiency design index in wave are calculated through the results of free running model test in regular wave.

並列關鍵字

free-running model test in regular wave ； self-propulsion test in regular wave ； energy efficiency design index

參考文獻

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