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中國造船暨輪機工程學刊 EIScopus

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篇名 NUMERICAL SIMULATION OF ADDED RESISTANCE IN HEAD WAVES FOR A CONTAINER SHIP
卷期 32:1
並列篇名 貨櫃船於頂浪中附加阻力之數值模擬
作者 林宗岳郭真祥王柏文
頁次 023-034
關鍵字 附加阻力耐海性能貨櫃輪計算流體力學Added ResistanceSeakeepingContainer ShipCFDEIScopus
出刊日期 201302

中文摘要

耐海試驗的目的為預測船舶在波浪中的運動和阻力反應,作為實海航行的安全和效能指標。雖然 以船楔試驗方法已可準確求得船舶之波浪阻力性能,但過程將耗费大童的成本與研究周期,目前仍常 用經驗法則估算》相對於現今已成熟發展之計算流體力學技術,數值計算方法可大幅降低成本和提高 效率並能得到合理的结果。本研究利用商用CFD軟體•以現有之1700 TEU貨櫃船劍艏船型以缩尺比1/50 為計算楔型,楔擬計算船舶在靜水與規則波下之航行阻力分析*目標為預估此船於台灣海峽波浪條件 下之實航阻力。整體採用有限體稻法搭配適用的紊流楔型求解雷諾平均之涅维爾-史托克方程式•並利 用流體體積法模擬自由液面之二相流。整體計算結果與船楔試驗盘測以及勢流理論計算結果比較*平 均附加阻力趨勢可正確預估丨運動反應部分則在定性及定S上皆與實驗吻合。最後配合贲際海域海象 波浪统計資料,此方法可保守推估船舶於實海上之航海餘裕。

英文摘要

The purpose of the seakeeping model test is to predict motion response which is important to estimate the safety and comfort indices in real sea operation. Although sea margin and waves and motions are closely related, a rough calculation of the former by empirical formula is typically sufficient. The goal of this paper is to test and demonstrate the capabilities of Reynolds-averaged Navier-Stokcs equations (RANS) solver to evaluate added resistance in head waves with forward ship speed. The geometry of a real 1,700 TEU container ship was modeled. The bare hull resistance was first computed and verified with experimental data. To simulate regular waves, boundary conditions were set by the aiiy wave equation. Then the heave and pitch motions of the hull were simulated by applying the arbitrary Lagrangian-Eulerian (ALE) technique. The mean added resistance coefficients were carried out and applied to whole-year sea state statistics from the Taiwan Strait. Results showed that the motion responses were consistent with experiments while the sea margin of 20% was found to be overestimated than experimental prediction and potential theory but still lies within empirical estimation.

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