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研究生:吳政翰
研究生(外文):Cheng-HanWu
論文名稱:船模阻力與推進相關實驗技術與預估分析之改良
論文名稱(外文):The Improvement of Resistance and Propulsion Related Experimental Techniques and Data Analysis for Ship Model Test
指導教授:陳政宏陳政宏引用關係
指導教授(外文):Jeng-Horng Chen
學位類別:碩士
校院名稱:國立成功大學
系所名稱:系統及船舶機電工程學系
學門:工程學門
學類:機械工程學類
論文種類:學術論文
論文出版年:2015
畢業學年度:103
語文別:英文
論文頁數:90
中文關鍵詞:船模試驗阻力試驗自推試驗艉跡流分析
外文關鍵詞:Ship model testResistance testSelf-propulsion testWake survey analysis.
相關次數:
  • 被引用被引用:4
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為改善各主要船模試驗項目的方法並提升結果的準確度,成大拖航水槽過去已成功地在阻力試驗使用鋼纜拖船,其高度設定與螺槳軸系等高,避免產生力矩;實驗完成後進行實船預估分析,結果也有相當的穩定度,但在儀器校正、數據擷取及實船預估分析的方法還有改善的空間。自推試驗使用動力計量測轉速、推力、與轉矩,並與阻力試驗得到之結果計算推減係數,但在實驗技術方面還有待改善,以及需推減係數偏大的問題需要解決。艉跡流則以五孔皮托管三維量測系統架設於船模艉部量測螺槳平面上入流的三維方向速度,但過去使用線性內插預估,仍需改善。
故本研究旨在探討以目前的實驗技術運用在不同船上,仍有實驗再線性,並且與國外水槽比較,期能提升成大拖航水槽之可靠度,並且使其邁向商業化。
透過多次試驗及實驗技術改進,船模R0之阻力與自推試驗可得到穩定的結果,艉跡流分析則採用Cubic hermite spline 的方式預估。船模J3的自推試驗結果,由於艉軸的安置太過緊密,導致摩擦力偏大,較為不穩定,但是仍在可接受的範圍內。
After some new experimental technologies of main ship model tests was successfully established, we still need improve the accuracy of those tests and the performance prediction method. The purpose of this research is also to study whether the procedure can obtain the same results by applying to different ships after repeatedly tests and comparing with the statistical data of foreign towing tank in order to promote the reliability and the commercialization of NCKU towing tank.
The steel cable method of resistance was established in NCKU towing tank. The measuring system is set up on the LCB position and the height of steel cable is equal to the propeller shaft to avoid producing a moment. After the resistance tests, the performance prediction was improved in this research and shows high stability.
To calculate the thrust deduction, we combine self-propulsion test which uses dynamometer to measure the revolution, torque and thrust and the result from resistance test. After several tests and improvement of experimental technologies, we obtain the stable result from ship model R0. But due to the shaft being placed too tightly which leads to the uncontrollable friction, the statistical data is therefore unstable though it still remains in the reasonable range.
The five-hole Pitot tube measurement system is located behind the stern of ship model R0 and used to measure the three-dimensional velocity profile of inflow on propeller plane, namely axial velocity, radial velocity and tangential velocity. The purpose of this research is to improve the wake fraction interpolation estimation method. Cubic hermite spline was found the best curve fitting method among others for wake survey data interpolation in radial direction.
摘要 I
ABSTRACT II
ACKNOWLEDGEMENT III
CONTENTS IV
LIST OF FIGURES VI
LIST OF TABLES VIII
NOMENCLATURE IX
Chapter 1 Introduction 1
1.1 Motivation 1
1.2 Literature Review 2
1.3 Research Purpose 5
Chapter 2 Research Method 6
2.1 Experimental Environment and Ship Condition 6
2.1.1 Towing Tank 6
2.1.2 Ships used in the Analysis 9
2.2 General scaling laws 11
2.3 The Resistance Test 13
2.3.1 Theory 14
2.3.2 Instrument and Set Up 19
2.3.3 Test Procedure 25
2.3.4 Data Acquisition 27
2.3.5 Uncertainty Analysis 29
2.4 The Self Propulsion Test 36
2.4.1 Theory 38
2.4.2 Instrument and Set Up 41
2.4.3 Test Procedure 44
2.4.4 Data Acquisition 46
2.4.5 Uncertainty Analysis 48
2.5 Wake fraction Estimated 52
2.5.1 Cubic spline 52
2.5.2 Cubic hermite spline 54
Chapter 3 Analyses of the Results 56
3.1 Results for R0 56
3.1.1 The Resistance Test 56
3.1.2 The Self Propulsion Test 57
3.1.3 Data Analysis and Comparison 59
3.2 Result for J3 59
3.2.1 The Resistance Test 60
3.2.2 The Self Propulsion Test 62
3.2.3 Data Analysis and Comparison 64
3.3 Result for wake fraction estimated 66
Chapter 4 Conclusions and Suggestions 77
4.1 Conclusions 77
4.2 Suggestions 78
REFERENCES 80
Appendix A Test Data 82
A.1 R0 data from the self-propulsion tests 82
A.2 J3 data from the self-propulsion tests 85
Appendix B J3 form factor (k) Estimation 88
Bartels, R. H.; Beatty, J. C.; and Barsky, B. A. Hermite and Cubic Spline Interpolation. Ch. 3 in An Introduction to Splines for Use in Computer Graphics and Geometric Modelling. San Francisco, CA: Morgan Kaufmann, pp. 9-17, 1998.
Bose, N. & Molloy, S. (2001). Ship powering prediction from self-propulsion load varying tests. In SP2001, Lavrentiev Lectures.
Chien-Chih Hsu (2013). Comparison of Five-Hole Pitot Tubes and Mini-LDV for Ship Model Wake Survey. National Cheng Kung University Department of Systems and Naval Mechatronic Engineering. 徐健智,迷你都普勒雷射測速儀及五孔皮托管量船模艉跡流之比較,國立成功大學系統及船舶機電工程研究所碩士論文,2013年。
Chen, Wei-Yang (2014). The Improvement and Comparison of the Main Ship Model Tests in a Towing Tank. National Cheng Kung University Department of Systems and Naval Mechatronic Engineering. 陳維揚,拖航水槽主要船模試驗項目之技術改善與比較分析,國立成功大學系統及船舶機電工程研究所碩士論文,2014年。
ITTC (1978). Recommended procedures and guidelines
ITTC (2011a). Recommended procedures and guidelines 7.5-02-01-03.
(Fresh Water and Seawater Properties)
ITTC (2011b). Recommended procedures and guidelines 7.5-02-02-01.
(Resistance Test)
ITTC (2011c). Recommended procedures and guidelines 7.5-02-03–01.1.
(Propulsion/Bollard Pull Test)
ITTC (2011d). Recommended procedures and guidelines 7.5-02-03-01.4.
(1978 ITTC Performance Prediction Method)
81
ITTC (2011e). Recommended procedures and guidelines 7.5-02-02-01.4.
(Guidelines for Uncertainty Analysis in Resistance Towing Tank Tests)
ITTC (2011f). Recommended procedures and guidelines 7.5-02-03-01.2.
(Propulsion, Performance Uncertainty Analysis, Example for Propulsion Test)
Lindgren, H., Aucher, M., Bowden, B., Gross, A., Minsaas, K., Muntjewerf, J.,
Tamura, K., and Wermter, R. (1978). Report of performance committee. In
15th ITTC Proceedings, volume 1, pages 359–404. 15th International Towing Tank Conference in The Hauge, Netherlands.
Øyan, E (2012). Speed and powering prediction for ships based on model testing. Norwegian University of Science and Technology Department of Marine Technology.
陸磐安,造船原理船舶動力學,五南圖書出版有限公司,民國八十八年
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