Development of an Integrated Computational Method for the Propeller Energy Loss Coefficients

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基本資料

Project title

Code/計畫編號

MOST103-2221-E019-059

Translated Name/計畫中文名

發展一整合性的螺槳能量損失係數計算方法

Project Coordinator/計畫主持人

Ching-Yeh Hsin

Funding Organization/主管機關

National Science and Technology Council

Department/Unit

Department of Systems Engineering and Naval Architecture

Website

https://www.grb.gov.tw/search/planDetail?id=8347418

Year

2014

Start date/計畫起

01-08-2014

Expected Completion/計畫迄

01-07-2015

Bugetid/研究經費

582千元

ResearchField/研究領域

機械工程
資訊科學--軟體

"本計畫提出的主要目的是發展一評估螺槳能量損失的計算方法，並對於螺槳邊界元素法進行計算精進的研究。第一年將著重於螺槳邊界元素法的精進，將確認應用邊界元素法計算葉尖端板效應螺槳(如 Kappel 與 CLT 螺槳) 的正確性，並予以探討與修正；探討應用邊界元素法於分析具有特殊翼型幾何的跨速度域螺槳時，計算誤差與不穩定性的來源，並進行修正與改進。針對這些非傳統螺槳，並將發展能模擬超空化與多處空化的邊界元素法空化計算模式。同時，將發展一正確且有效的誘導速度計算模式，以精準計算能量損失係數。第二年將著重於螺槳能量損失係數計算方法的建立，應用與驗證。本計畫的能量損失係數將效率分為軸向損失、旋向損失，軸向增益以及有限葉片數損失，尤其著重於軸向以及旋向損失。在建立計算方法後，將應用能量損失係數計算具端板效應的非傳統螺槳以及特殊翼型的跨速度域螺槳，並探討其能量損失的特性。我們並將發展黏性流中能量損失係數的計算模式，以探討黏性對於能量損失的影響。在第二年中，並將探討空化、與其他裝置交互作用、波浪以及船艉跡流對於螺槳能量損失的影響，以了解外在流場對於螺槳效能影響的機制。此次所提出的計畫，希望能發展一正確且穩定的計算方法評估螺槳與相關裝置節能的原因與效能，並期待此計算方法可以輔助節能推進裝置的設計與分析，並可以協助“能源效率設計指標＂(EEDI)的評估計算。 " "The objectives of this proposal are to develop a computational method for the energy loss coefficients, and to improve the propeller boundary element method. The first year will focus on the improvement of propeller boundary element method. The accuracy of the predictions of performance and flow around the end-plate propellers, such as Kappel propeller and CLT propeller, will be confirmed and improved. The sources of computational errors and instability for predicting the performance of Trans-Velocity propellers will also be investigated and corrected. Also, the supercavitation model and the model for simulating more than one sheet cavitation by boundary element method will be developed for these unconventional propellers. Finally, the accurate and effective algorithm for computing the induced velocities will be developed to accurately compute the energy loss coefficients. In the second year, we will focus on the establishment and applications of the computational method for the energy loss coefficients. The energy loss coefficients here can decompose the efficiency into several components, and they are axial loss, rotational loss, axial gain and finite number of blade loss coefficients. The most important coefficients are the axial and rotational loss coefficients. This computational method will be used to analyze the energy loss characteristics of the end-plate effect propellers and the Trans-Velocity propellers. The computations of energy loss coefficients in the viscous flow will be carried out, and effect of the viscosity will then be studied. The effects of the cavitation, interactions with other devices, wave and ship wake to the energy loss will also be investigated. An accurate and stable computational method which can evaluate the causes and effectiveness of energy-saving propulsors will be developed in this proposed project, and this method should be able to assist the design of energy-saving devices and evaluation of the Energy Efficiency Design Index (EEDI). "

Keyword(s)

節能螺槳
邊界元素法
空化
能量損失係數
Kappel 螺槳
CLT螺槳
跨速度域螺槳
能源效率設計指標
energy-saving propeller
boundary element method
cavitation
energy loss coefficient
Kappel propeller
CLT propeller
Trans-Velocity propeller
EEDI

DSpace CRIS

Development of an Integrated Computational Method for the Propeller Energy Loss Coefficients

基本資料

Description