A Research on the Influence of Planing Hull Stern Flap on the Resistance Performance by CFD
- Abstract
- Abstract
As a kind of mature ship form, planing hull has been widely used in military and civilian areas. Researchers have been pursuing a optimizing ship form which could present a better resistance and hydrodynamic performance. It is proved that the rational design of stern flap could improve the flow field around the ship and the hydrodynamic performance of planing hull effectively according to the existing conclusions and experiment results. In this paper, the fundamental principle of stern flap is introduced simply first. And then, since the chord length, breadth and incidence angle are the important dimensions of stern flap which could make a significant influence on the stern flap performances we define the chord length and incidence angle as the design parameters here and investigate the influence of these two parameters on total resistance using CFX. Finally, the optimal dimension range of stern flap for resistance performance is obtained through the comparison of different stern flaps. Of course, the comparison between experiment results and CFD results must be done previously to prove the accuracy of CFD method for this problem.
Keywords: Planing hull; Stern flap; CFD; Goal Driven Optimization (GDO).
- Issued Date
- 2014
- Awarded Date
- 2014. 2
- Type
- Dissertation
- Publisher
- 부경대학교
- Affiliation
- 대학원
- Department
- 대학원 조선해양시스템공학과
- Advisor
- 김동준
- Table Of Contents
- Contents
Contents i
List of Figures iii
List of Tables vi
Abstract vii
I. INTRODUCTION 1
1.1 General 1
1.2 Problem and Objective 2
1.3 Organization of Thesis: 3
Ⅱ. HYDRODYNAMIC PRINCIPLES 5
2.1 Planing Hull 5
2.2 Stern Flap 10
2.2.1 What is it? 10
2.2.2 Concept 11
2.2.3 Hydrodynamic principles 12
Ⅲ. FUNDAMENTAL THEORY 15
3.1 Computational Fluid Dynamics 15
3.2 Understanding Goal Driven Optimization 19
3.2.1 Introduction 19
3.2.2 Principles (GDO) 19
3.2.3 Guidelines and Best Practices (GDO) 21
3.2.4 Goal Driven Optimization Theory 25
Ⅳ. VALIDATION OF CFD METHOD 30
4.1 Introduction 30
4.2 Modeling 30
4.3 Meshing 36
4.4 Boundary Conditions 37
4.5 Results of Analysis 39
4.6 Discussion 53
Ⅴ. OPTIMAZATION DESIGN FOR STERN FLAP 54
5.1 Introduction 54
5.2 Workflow 55
5.3 Geometry 55
5.4 Meshing 58
5.5 Analysis and Results 59
5.6 Discussion 68
Ⅵ. CONCLUSIONS 70
REFERNECES 72
국 문 요 약 74
ACKNOWLEDGEMENTS 76
- Degree
- Master
- Appears in Collections:
- 대학원 > 조선해양시스템공학과
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