潛艦操縱運動模組化數學模式交互作用係數之探討

Abstract

本文研究重點著重於使用CFD的ANSYS-FLUENT計算流體力學的方法，進行潛艦於無窮流體中之流體動力交互作用係數之探討。根據國立台灣大學工程科學及海洋工程學系「運動與控制實驗室」(以下簡稱本實驗室)過往依循日本在船舶操縱運動方面所建構之MMG數學模式發展的模組化潛艦操縱運動數學模式為基礎，探討其中各個部件包含胴體、艏翼、艉翼、舵和螺槳等，彼此間的交互作用影響效應，以及潛艦運動時對於各部件造成之交互作用效應。透過一系列CFD的數值計算，完成潛艦部件模組間交互作用係數與潛體運動時引致之交互作用係數之計算與分析，其中包含各部件單獨性能計算、潛艦直航試驗、潛艦直航試驗(改變舵、艏翼及艉翼之角度)及潛艦針對螺槳效應及舵效應之迴旋臂試驗。再依據計算結果，分析得到交互作用係數，並代入本實驗室開發之潛艦操船模擬程式，應用包含與不含交互作用係數下之模組化數學模式，分別完成仿擬潛艦一系列操船模擬計算與比較，以及模組化模式中之交互作用係數對於仿擬潛艦之操縱性能效應之探討。

The present study focuses on utilizing CFD (computational fluid dynamics) method to calculate the hydrodynamic coefficients of submarine in an infinite fluid and investigate its interaction coefficients. On the basis of a MMG (Maneuvering Modeling Group) mathematical model for ship in Japan, our laboratory, maneuvering and control laboratory in National Taiwan University, has developed the modular modeling methodology for submarine. Under such a background, the submarine can be divided into several parts including fuselage, sail, bow planes, stern planes, rudder, propeller and so on. And the hydrodynamic characteristics of each part can be analyzed mathematically individually. By conducting a series of CFD simulation including performance test of single element, submarine straight towing test (rudders or planes with/without angle of attack) and rotating arm test (for propeller and rudder), the interact effects between the elements and interact effects caused by submarine motions are able to be investigated. And those interaction coefficients can be determined. By applying the obtained results of interaction coefficients into the submarine maneuvering simulation program, which is also developed by our lab, and carrying out a series of submarine maneuvering test simulations, the effects of interaction coefficients on the submarine maneuvering can be effectively compared and discussed.