Investigation of Self-Propulsion Simulation for Submarine in Different Sailing Conditions (II)

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Project title

Code/計畫編號

MOST105-2218-E019-002

Translated Name/計畫中文名

探討不同航行狀況下水下載具自推時的流力特性 (II)-探討不同航行狀況下水下載具自推時的流力特性 (II)

Project Coordinator/計畫主持人

Ching-Yeh Hsin

Funding Organization/主管機關

National Science and Technology Council

Co-Investigator(s)/共同執行人

黃維信
鍾孟軒
王偉仲

Department/Unit

Department of Systems Engineering and Naval Architecture

Website

https://www.grb.gov.tw/search/planDetail?id=11806374

Year

2016

Start date/計畫起

01-04-2016

Expected Completion/計畫迄

31-03-2017

Co-Investigator(s)

Pai-Chen Guan
Yi-Chih Chow

Bugetid/研究經費

4000千元

ResearchField/研究領域

機械工程

本計畫將應用算方法探討水下載具在不同航行狀況達到自推時的相關流體力學問題，本計畫將應用算方法探討水下載具在不同航行狀況達到自推時的相關流體力學問題，本計畫將應用算方法探討水下載具在不同航行狀況達到自推時的相關流體力學問題，相關流力問題包含受與場細節。計畫將分為三個子進行，相關流力問題包含受與場細節。計畫將分為三個子進行，相關流力問題包含受與場細節。計畫將分為三個子進行，相關流力問題包含受與場細節。計畫將分為三個子進行，子題一是水下載具自推模擬：探一是水下載具自推模擬：探一是水下載具自推模擬：探討如何應用計算方法模擬型與實尺寸水下載具在直航與斜航時的自推點，將應用體積力方法進的自推點，將應用體積力方法進的自推點，將應用體積力方法進行載具與螺槳的交互作用模擬，而由於計算量相當大並將對進行平化的研究作用模擬，而由於計算量相當大並將對進行平化的研究作用模擬，而由於計算量相當大並將對進行平化的研究作用模擬，而由於計算量相當大並將對進行平化的研究作用模擬，而由於計算量相當大並將對進行平化的研究。由於本計畫的每一項計算皆牽涉大量計算，計算，平行化的研究將橫跨於每一子題。子題二是細節流場影響探二是細節流場影響探討，將進行水下載具細節流場，尤其是不同渦系形成與發展的模擬探討。下載具細節流場，尤其是不同渦系形成與發展的模擬探討。下載具細節流場，尤其是不同渦系形成與發展的模擬探討。下載具細節流場，尤其是不同渦系形成與發展的模擬探討。主要在於探討帆罩與接合面之馬蹄渦與其尾端尖的形成與發展，形成與發展，並對控制翼所形成之渦系在自由液面影響下的系發展進行研究。系發展進行研究。子題三是流場噪音分析計算：將針對流場噪音分析計算：將針對流場噪音分析計算：將針對前二子題計算所得流場與受力，進行計算所得流場與受力，進行計算所得流場與受力，進行引發噪音的計算。對於子引發噪音的計算。對於子引發噪音的計算。對於子題二的計算結果，重點在於渦系所引發噪音而對子題的計算結果，重點在於渦系所引發噪音而對子題的計算結果，重點在於渦系所引發噪音而對子題的計算結果，重點在於渦系所引發噪音而對子題的計算結果，重點在於渦系所引發噪音而對子題一的計算結果，則專注於螺槳在非定常流中造成軸系振動所引發的潛體噪音果，則專注於螺槳在非定常流中造成軸系振動所引發的潛體噪音果，則專注於螺槳在非定常流中造成軸系振動所引發的潛體噪音果，則專注於螺槳在非定常流中造成軸系振動所引發的潛體噪音果，則專注於螺槳在非定常流中造成軸系振動所引發的潛體噪音果，則專注於螺槳在非定常流中造成軸系振動所引發的潛體噪音果，則專注於螺槳在非定常流中造成軸系振動所引發的潛體噪音果，則專注於螺槳在非定常流中造成軸系振動所引發的潛體噪音果，則專注於螺槳在非定常流中造成軸系振動所引發的潛體噪音果，則專注於螺槳在非定常流中造成軸系振動所引發的潛體噪音；既然本計畫探討自推相關問題，此因螺槳非定常入流所造成的噪音勢必不可忽視。相信透過跨領域的計算與驗證，就水下載具最基本卻複雜的自推進行研究，將可更深入了解下載具的水動力特性。 The objective of this proposal is to investigate the flow characteristics of underwater vehicle at self-propulsion point in different inflow conditions. This research includes the predictions of both forces and detailed flows. Three subjects are included in this project. The first one is to simulate the self-propulsion of an underwater vehicle in different courses, and both the model scale and full scale vehicles will be investigated. The body force method is used to compute the interactions between the hull and the propeller. Development of novel parallel algorithms in computations will be carried out to more efficiently solve problems in this subject and other two subjects since large amount of computations are involved in every subject. Subject II is to compute the detailed flow around the underwater vehicle, especially to study the formation and development of different vortex systems. The juncture vortex at the junction of sail and hull, along with the tip vortex of the sail will be mainly investigated in this project. The vortex systems of control surfaces and the influences of the free surface to vortex systems will also be studied. The subject III is to compute and analyze the flow noise. The flow field and forces obtained from both subjects I and II will be used for evaluating the flow noise. For the subject II, the vortices in the computed detailed flow will be used to compute the flow induced noise. For the subject I, due the unsteady inflow of the propeller, the propeller unsteady forces usually cause shaft vibrations. This vibration will transmit to the hull, and induced noise. Because this noise is critical when investigating the self-propulsion problems, it is also included in the proposed project. Both verifications and validations will be made for all computational results. It is believed that by combining different computational methods, we can understand more hydrodynamics of underwater vehicles through investigating this fundamental but complicated self-propulsion problem

Keyword(s)

水下載具
潛艇自推馬蹄渦尖流體噪
Underwater vehicle
submarine
self-propulsion
horseshoe vortex
tip vortex
flow noise

DSpace CRIS

Investigation of Self-Propulsion Simulation for Submarine in Different Sailing Conditions (II)

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