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Two-Dimensional Fluid-Structure Interaction of Flapping Micro Aerial Vehicles : 날갯짓 초소형 비행체의 2차원 유체-구조 연성해석
DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | 김종암 | - |
dc.contributor.author | 정혜승 | - |
dc.date.accessioned | 2017-07-14T03:40:55Z | - |
dc.date.available | 2017-07-14T03:40:55Z | - |
dc.date.issued | 2016-02 | - |
dc.identifier.other | 000000133311 | - |
dc.identifier.uri | https://hdl.handle.net/10371/123883 | - |
dc.description | 학위논문 (석사)-- 서울대학교 대학원 : 기계항공공학부, 2016. 2. 김종암. | - |
dc.description.abstract | In this thesis, flow around flapping micro aerial vehicles is analyzed by two-dimensional fluid-structure interaction (FSI) simulation. Flow analysis program is developed using the two-dimensional unsteady incompressible Navier-Stokes equations based on arbitrary Lagrangian-Eulerian framework, and validated with the case of a plunging flexible airfoil. Structure analysis program is developed using nonlinear co-rotational plane beam formulation and validated with cantilevered plate under tip load condition problem and plunging plate problem. Two programs are coupled with implicit coupling strategy, and Delaunay graph mapping method is adopted for dynamic grid deformation and common-refinement method for data transfer. The developed FSI program is validated with plunging flexible airfoil case. By two-dimensional FSI simulation of hovering flapping micro aerial vehicles (FMAVs), the effect of flexibility of the FMAVs' wing on aerodynamic performances is investigated in conjunction with unsteady force generation mechanisms. | - |
dc.description.tableofcontents | Chapter 1 Introduction 1
1.1 Research Background 1 1.2 Objective of Thesis 2 Chapter 2 Numerical Approaches 4 2.1 Fluid-Structure Interaction Coupling Strategy 4 2.1.1 Coupling Strategy 4 2.1.2 Data Transfer at Nonmatching Interface 6 2.1.3 Dynamic Grid Deformation 6 2.2 Fluid Analysis Module 7 2.2.1 Governing Equations 7 2.2.2 Time-Accurate Articial Compressibility Methods 10 2.2.3 Spatial Discretization 11 2.2.4 Time Integration 15 2.3 Structure Analysis Module 16 Chapter 3 Validations 18 3.1 Validation of Flow Analysis Module 18 3.2 Validation of Structure Analysis Module 19 3.2.1 Cantilevered Plate in Tip Load Conditions 21 3.2.2 Plunging Flexible Flat Plate 22 3.3 Validation of Integrated FSI Program 23 Chapter 4 FSI Analysis of FMAVs 29 4.1 Geometric and Kinematic Modeling 29 4.1.1 Geometric Modeling 29 4.1.2 Kinematic Modeling 30 4.2 Sensitivity Tests 32 4.3 Numerical Results 32 4.3.1 Comparison of Floweld Between Rigid and Flexible Wing 34 4.3.2 Effect of Flexibility on Aerodynamic Performances 39 Chapter 5 Conclusion 41 Bibliography 43 국문초록 47 | - |
dc.format | application/pdf | - |
dc.format.extent | 4778181 bytes | - |
dc.format.medium | application/pdf | - |
dc.language.iso | en | - |
dc.publisher | 서울대학교 대학원 | - |
dc.subject | Computational fluid dynamics | - |
dc.subject | Fluid-structure interaction analysis | - |
dc.subject | Flapping flight | - |
dc.subject | Flapping micro aerial vehicles | - |
dc.subject | Unsteady force generation mechanism | - |
dc.subject.ddc | 621 | - |
dc.title | Two-Dimensional Fluid-Structure Interaction of Flapping Micro Aerial Vehicles | - |
dc.title.alternative | 날갯짓 초소형 비행체의 2차원 유체-구조 연성해석 | - |
dc.type | Thesis | - |
dc.description.degree | Master | - |
dc.citation.pages | vi, 47 | - |
dc.contributor.affiliation | 공과대학 기계항공공학부 | - |
dc.date.awarded | 2016-02 | - |
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