Study on Energy Saving and Silent Propeller Design

View Statistics Email Alert RSS Feed

Information

Details

Project title

Code/計畫編號

90農科-5.1.2-漁-F1(5)

Translated Name/計畫中文名

省能源高靜音螺槳設計研究

Funding Organization/主管機關

Council of Agriculture,Executive Yuan

Co-Investigator(s)/共同執行人

許榮均

Department/Unit

Department of Systems Engineering and Naval Architecture

Website

https://www.grb.gov.tw/search/planDetail?id=1046652

Year

2001

Start date/計畫起

31-12-2000

Expected Completion/計畫迄

01-12-2001

Co-Investigator(s)

Rong-Juin Shyu

Bugetid/研究經費

738千元

ResearchField/研究領域

機械工程
漁業

由於鮪釣漁船之魚獲有相當高之比例被海豚吃掉, 推測主要原因是漁船噪音吸引海豚之注意, 而其中主要引起海豚注意之噪音源是螺槳葉尖渦空泡( propeller tip vortex cavitation )與非定常片狀空泡( unsteady sheet cavitation )所產生之高頻噪音.本計畫將依據螺槳理論採用新翼形設計鮪釣漁船之螺槳, 設計過程將嚴格控制螺槳葉尖渦空泡與非定常片狀空泡之發生, 以確保有效降低螺槳噪音, 而不致引起海豚之注意.之後進行鮪釣漁船實船之艙間噪音與振動之量測, 並嘗試建立簡易型之水下噪音量測系統, 以比較新設計螺槳與傳統螺槳間噪音與振動改善之程度.預估本計畫所設計之螺槳水下噪音可以下降3-5dB, 而艙間噪音可以下降3dB, 螺槳引起之艙間振動可以下降得40-50%之振幅. For the long liner, the underwater noise caused by the propeller tip vortex cavitation and unsteady sheet cavitation in high frequency may attract dolphins.The attraction for dolphins will reduce the catch of fish obviously because some catch are eaten by the dolphins.In this project, the propeller of the long liner will be designed according to propeller theory with New-section foil; besides, the propeller tip vortex cavitation and unsteady sheet cavitation will be controlled strictly to reduce the underwater noise.Consequently the dolphins will not be attracted by the underwater noise produced by the operating propeller.In order to estimate the improvement of the new designed propeller in noise and vibration, the cabin noise and vibration of the long liner will be measured in sea trial, and a simple measuring system for underwater noise will also be developed then.The new designed propeller is expected to reduce 3-5dB for the underwater noise, about 3dB for the cabin noise, and 40-50percent of amplitude for the cabin vibration due to the operating propeller.

DSpace CRIS

Study on Energy Saving and Silent Propeller Design

Details

Description