應用計算流體力學方法分析仿209型潛艦流體動力係數之探討

Abstract

國立台灣大學工程及海洋工程學系是全國最早建置垂直平面運動機構(Vertical Planar Motion Mechanism；VPMM)，執行斜航試驗(Oblique Towing Test)及VPMM等拘束模型試驗(Captive Model Test)量測潛體流體動力係數的系所。本實驗室迄今已先後完成T1軸對稱潛體、AUV-HM1自主式水下載具、仿209型潛艦等拘束模型試驗，藉此量測潛體之流體動力係數，並進而分析其操縱性能。 隨著電腦科技迅速發展，計算流體力學之研究日益精進，許多研究亦企圖使用計算流體力學模擬潛體運動來替代拘束模型試驗，求其流體動力係數，以期節省進行拘束模型試驗所需的時間與經費。 本研究在上述背景下，以計算流體力學工具進行仿209型潛艦模型的斜航試驗、等加速度運動及垂直平面運動試驗數值模擬，計算其流體動力並分析流體動力係數及其操縱性能，並與本實驗室於民國九十四年[1]及民國一零八年[2]進行之拘束模型試驗結果進行比較，探討數值模擬與實驗結果之間的差異，確認了數值模擬在流體動力係數計算及安定性能評估上與文獻[2]實驗分析結果有相近的趨勢。

Department of engineering science and ocean engineering (ESOE) in National Taiwan University was the first department in Taiwan that established Vertical Planar Motion Mechanism(VPMM) system and the first department developing the captive model tests including oblique towing test and VPMM test for a submerged body. Maneuvering and control laboratory of ESOE has subsequently carried out the captive model tests of T1 axisymmetric submerged body, AUV-HM1 autonomous underwater vehicle, and type 209 submarine model to measure their hydrodynamic forces, and then further analyzed the hydrodynamic coefficients and maneuvering performance. Due to the quick progression in computer science, researches of computational fluid dynamics (CFD) have been increasing refined, as a result, there are more and more labs trying to replace the captive model tests with CFD to save much expense. In the background of the previous statements, this thesis applies CFD to simulate type 209 submarine conducting oblique towing test and VPMM test to analyze its hydrodynamic coefficients, and this thesis would compare the CFD results with experiment results which were conducted in 2005 and 2019., This research would investigate the difference among them and evaluate the reliability of CFD and experiments, in order to be helpful for establishing a more reliable VPMM system.