穿浪式雙體船之阻力計算與分析

Calculation and Analysis of the Drag for a Wave Piercing Catamaran

周文祥(Wen-Shiang Chou)

指導教授 ： 郭真祥

國立臺灣大學/工學院/工程科學及海洋工程學研究所/碩士(2009年)

https://doi.org/10.6342/NTU.2009.00135

摘要

本研究著眼於穿浪式雙體船(Wave Piercing Catamaran,WPC)之阻力計算，以計算流體力學方法分析船體周圍流場，計算過程中使用有限體積法與結構化網格將計算空間離散，以計算穩態之船舶周圍含自由液面效應之黏性流場。
在計算穿浪式雙體船的阻力之前，先以Insel與Molland所完成的Wigley雙體船之船模試驗結果，作為計算流體力學方法的驗證。而後再計算穿浪式雙體船於不同速度下所受的阻力，並與船模試驗結果比較。另外，改變穿浪式雙體船兩船體之間距，探討穿浪式雙體船之阻力與兩船體間距之關係。
經由各計算結果與實驗結果的比較中，顯示大部分的計算趨勢與實驗皆相當吻合，但定量上卻仍有約10%左右的誤差存在。

關鍵字

穿浪式雙體船 ； 阻力計算 ； 計算流體力學 ； Wigley船形

並列摘要

The focus of this research is put on the resistance calculation of a wave piercing catamaran(WPC) by using the method of the computational fluid dynamics to calculate the flow field. The computational process is based on the finite volume method and the structural grid is adopted to discretize the computational domain, so that the calculation of the viscous flow around the twin-hull with free-surface effect in steady state can be carried out.
Before the resistance calculation of the wave piercing catamaran, the results from the Wigley catamaran model tests by Insel and Molland are used to validate the numerical results from our CFD method. The resistances calculated by the wave piercing catamarans at different speeds are then compared with those resulted from the ship model tests carried out at NTU towing tank. There by, the distance between the twin hulls of the WPC for examining the influence of the distance between the twin hulls on the variation of the resistance and distance.
Through comparison of calculation results and experimental results, it reveals that the trends formed by most calculations are well consistent with those formed by experimental results while the corresponding numerical deviations still appear an amount of about 10% within acceptable ranges.

並列關鍵字

wave piercing catamaran ； resistance computation ； computational fluid dynamics ； Wigley hull form

參考文獻

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