Blade Design

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Project title

Blade Design

Code/計畫編號

MOST104-ET-E019-003-ET

Translated Name/計畫中文名

減少洋流渦輪機尾跡流效應之葉片設計

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=11282545

Year

2015

Start date/計畫起

01-01-2015

Expected Completion/計畫迄

01-12-2015

Bugetid/研究經費

550千元

ResearchField/研究領域

機械工程

"本計畫係針對黑潮發電廠的技術，提出應用計算方法對於黑潮洋流渦輪機尾跡流的影響進行探討，並提出可產生較小尾跡流效應且產生較大功率的葉片設計想法，而此葉片的幾何是一具端板效應的葉片幾何。因此本計畫的兩個重點，一是洋流渦輪機尾跡流效應的探討，一是端板效應洋流渦輪機葉片的設計與成效評估。在洋流渦輪機尾跡流效應的探討上，將應用體積力的方法進行計算，體積力方法可以將完成設計的渦輪機葉片受力轉為體積力，在黏性流中進行多台渦輪機的模擬，以了解多台渦輪機組成的陣列在互相影響下的整體性能與受力。而端板效應洋流渦輪機葉片的設計，則將沿用類似螺槳設計的設計法，進行葉片的設計，亦即應用升力線方法設計負荷分布，應用升力面方法進行葉片幾何設計，最後應用邊界元素法或是RANS 方法確認設計葉片的受力。計畫中並將試著同步應用葉片元素動量法或是邊界元素法作為計算方法，基因演算法作為最佳化方法進行設計，以與上述方法的設計進行比較，確認設計的成效。在葉片設計的過程中，我們將以性能、葉片抗空化的能力以及對於設計條件的敏感度等作為評估與比較的標準，最後並將與傳統葉片比較其功率以及尾跡流效應的大小。本計畫預期的目標是設計一可產生較小尾跡流效應且更高功率，應用於洋流渦輪機的端板效應葉片，而計畫在完成此目標之外，並將發展方法對於洋流渦輪機葉片尾跡流的影響效應進行評估，以及發展一設計應用於洋流渦輪機端板效應葉片的方法。" "The objectives of this proposal are first to develop a method to evaluate the wake effects of current turbines used for extracting the energy from Kuroshio. Secondly, to propose a current blade geometry which may produce more power and can reduce the wake effects, and this blade geometry is an end-plate effect blade geimetry. Therefore, two major tasks in this proposed research, one is to investigate the wake effects, and the other one is to to design an end-plate effect current turbine blade. We will use the body force method to evaluate the current turbine blade wake effects. The body force method proposed here is to use the boundary element method to compute the current turbine blade forces, and then transfer to “body force” in the Navier-Stoeks equation. The whole flow field with current turbine or current turbine array thus can be computed and evaluated by the viscous flow RANS method. To design the end-plate effect current turbine blade, a design procedure similar to the marine propellers design procedure will be used. In this procedure, the lifting line method is used for the design of the optimum circulation distribution, and the lifting surface method is then adopted for the blade geometry design. The boundary element method and the RANS method can then be used to confirm the designed forces. In this proposed research, Genetic Algorithm method will also be used to design the turbine blade geometry. The performance and wake effects of this designed end-plate effect current turbine blade will then be compared to the traditional blade geometry."

Keyword(s)

洋流渦輪機
端板效應
葉片設計
邊界元素法
RANS 方法
體積力方法
current turbine
end-plate effect
blade design
boundary element method
RANS method
body force method

DSpace CRIS

Blade Design

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Description