本研究方向在於建立螺槳之自動化網格分析模組，做為螺槳設計參數最佳化分析的基礎，並結合商用數值分析軟體STAR-CD，進行螺槳單獨性紊流流場分析計算，以中型貨櫃輪的設計螺槳為研究標的，逐一變化各螺槳設計參數：螺槳歪斜度(Skew)、葉片後傾度(Rake)、弦長(Chord length)、葉片數目。經由分析找出兼具高精確度以及節省計算時間效果的適合網格模組，並檢視各參數對單獨螺槳效能的影響。螺槳紊流流場分析除了提供設計需求的性能數據，還可以進一步觀察葉片詳細之流場特性，如葉端渦漩(tip vortex)、導緣(Leading edge)與墊緣(Trailing edge)附近的流場細節，以協助設計者掌握葉面設計細節。藉由本研究可快速建立螺槳網格並協助螺槳最佳化設計及探討勢流分析所無法模擬的螺槳翼端渦流現象。

The main objective of present study is to develop an automatic grid generation procedure for the parametric performance analysis of the marine propellers. The simulation platform is based on the STAR-CD software to compute the flowfield of the 2695 model propeller provided by the china ship building company. There are also open water tests data available at different advance ratios to allow careful examinations of the prediction capability of the present numerical procedure. Also, CSBC provides simulation results using panel method, which can also be used as supplementary criteria of the results. A series of parametric studies are performed on the model 2695 to explore the influences of the propeller efficiency, which include skew, rake, area ratio (chord length) and the number of the propeller blades. The results indicate that the increase of skew has little effects on the performance of the propeller. However, increase of the rake and chord length do reduce the performance of the propeller, The reduction of blade number, on the other hand, increase the efficiency, however, the thrust of force is reduced due to decrease of the blade number.

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