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NUMERICAL STUDY OF ALUMINUM BLADE OF AN AXIAL
FAN WITH VARIOUS TWIST ANGLE AND CHORD
LENGTH USING ABAQUS SOFTWARE
Thesis
Organized to meet a part of the requirements to achieve the master degree of Mechanical Engineering
By
EBRAHIM MUSTAFA ABDALLA
S951302504
DEPARTMENT OF MECHANICAL ENGINEERING
ENGINEERING FACULTY
SEBELAS MARET UNIVERSITY
SURAKARTA
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ORIGINALITY AND PUBLICATION STATEMENT
We declared that:
1. Thesis entitled: NUMERICAL STUDY OF ALUMINUM BLADE OF AN AXIAL FAN WITH VARIOUS TWIST ANGLE AND CHORD LENGTH
USING ABAQUS SOFTWARE there
is no scientific papers that have been asked by others to obtain academic degrees and there is no work or opinion ever written or published by another person except in writing used as a reference in this text and a reference source as well as mentioned in the bibliography. If at a later proved there is plagiarism in scientific papers, then I am willing to accept sanctions in accordance with the provisions of the legislation (Permendiknas No 17, tahun 2010)
2. Publication of some or all of the contents of the Thesis or other scientific forums and permission must include the author and the team as a supervisor. If within at least one semester (six months after examination of the thesis) I did not make the publication of part or entire of this thesis, the Program in Mechanical Engineering of UNS has the right to publish in a scientific journal published by Study Program in Mechanical Engineering of UNS. If I violate of the provisions of this publication, then I am willing to get an academic sanction.
Surakarta, June 2015
Student,
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vMOTTO
will never know the real answer, before you
(anonim)
you want the respect of others, you must respect yourself
(anonim)
"Be a good man, because Allah loves the goodness"
(The writer)
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viDEDICATION
This paper is dedicated to:
1. Mustafa and Hansa, my parents who have been educated with simplicity, compassion with tolerance and patience above all prayer and boundless sacrifices that he always gave to the author.
2. Rabiah and Hasna and Fatima and Yusuf my wife and my children dear, who always gives warmth and motivation that makes its own spirit to the author. 3. Brother and sister who always gives a special motivation so I have always
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viiACKNOWLEDGEMENT
All praise and gratitude writer prayed Almighty God's gift. Because thanks to NUMERICAL STUDY OF ALUMINUM BLADE OF AN AXIAL FAN WITH VARIOUS TWIST ANGLE AND CHORD LENGTH USING ABAQUS SOFTWARE . The authors wish to thank you especially to the supervisor that the Honorable. Dr. Danardono DPT and Dr.Triyono ST. Which has deigned to provide motivation, direction, guidance, knowledge, inputs and corrections to this thesis can be resolved. As well as to the entire to fathers Mechanical Engineering lecturer Engineering Faculty Program Sebelas Maret University of Surakarta who has given science and knowledge to the author for his education at the Graduate Program, Sebelas Maret University of Surakarta.
On this occasion, the authors also express gratitude to:
1. Prof. Dr. Ravik Karsidi, M.S., as Rector of the University of Sebelas Maret, which has given permission to the author and the opportunity to participate in and complete the Graduate Program at the Sebelas Maret University of Surakarta. 2. Prof. Dr. M. Furqon Hidayatullah, M.Pd., as Director of the Graduate Program,
Sebelas Maret University of Surakarta who has given the author the opportunity to gain knowledge of education in the Graduate Program.
3. Dr. Danardono , as the first supervisor who has given direction and guidance in the preparation of the thesis.
4. Dr. Triyono, ST.,MT. as the Second supervisor who has given direction and guidance in the preparation of the thesis
5. Dr. Triyono, ST.,MT. as Head of Mechanical Engineering Graduate Program, University of Maret , who has given direction and guidance in the preparation of the thesis
6. All those who helped in completing this thesis and the author cannot describe one by one.
Care and support they have given to the author will be given just reward by Allah Almighty and be charitable and glory for all of us.
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viiiEbrahim Mustafa Abdalla, S951302504 (NUMERICAL STUDY OF ALUMINUM BLADE OF AN AXIAL FAN WITH VARIOUS TWIST ANGLES AND CHORD LENGTHS USING ABAQUS SOFTWARE). Thesis: The Graduate Program in Mechanical EngineeringProgram, Sebelas Maret University, Surakarta, 2015. Supervisor I: D.Danardono D.P.T., S.T., M.T., Ph.D. Supervisor II: Dr. Triyono, ST., MT.
ABSTRACT
The purpose of this work is to optimize the blade design of an axial-flow fan. Four different chord length and five twisting angle of their blades were studied. The fan was designed by using NACA 5505 series. The first investigation is conducted to the blade design in the variation of chord length. The base chord length is constant of 130 mm and the tip is vary from 84, 92, 102 and 110 mm. The second study is in the variation of twisting angle from 0, 10, 20, 30 and 40o. The performances of the fans were measured in a Von Mises stress criterion under pressure of 500 Pa. From the From the stress result, the proposed model was delivered lower stress compared to the other models.
Keywords: Axial fan, twist angle, chord length, stress analysis, finite element
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ixCONTENT LIST
TITLE PAGE ... i
APPROVAL PAGE ... ii
SUPERVISOR ENDORSEMENT ... iii
STATEMENT OF ORIGINALITY AND PUBLICATION OF CONTENTS THESIS ... iv
2.1.4 Chord length, and twist angle optimization ... 6
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3.11 Flow Chart of the Research Methodology ... 24
CHAPTER IV RESULTS AND DISCUSSION ... 25
4.1 Validation of Analysis ... 25
4.2 Influence of Chord Length ... 26
4.3 Influence of Twisting Angle ... 28
4.4 Results of Proposed Model ... 32
CHAPTER V CONCLUSION AND SUGGESTION ... 36
5.1 Conclusion ... 36
5.2 Suggestion ... 36
REFERENCE ... 37
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Figure 2.4 Two views of a fabricated tube axial fan wheel, with larger blade angles at hub and smaller blade angles at the tip ... 12
Figure 3.1 Axial Aluminum ... 16
Figure 3.2 NACA 5505 Airfoil in AutoCAD ... 18
Figure 3.3 Designed blade without twist angle ... 19
Figure 3.4 Designed blade with 20° of twist angle ... 19
Figure 3.5 The first module in ABAQUS: module part ... 20
Figure 3.6 Assign section material to the blade ... 20
Figure 3.7 Loading and boundary condition ... 21
Figure 3.8 Meshed blade ... 21
Figure 3.9 Mesh dimensional rectangular flat elements ... 22
Figure 3.10 Airfoil shape of cross section with different twist angles ... 22
Figure 3.11 Twist angle in root and tip ... 22
Figure 3.12 The proposed model use different twisting angle in four span ... 23
Figure 3.13 Flow Chart of the Research Methodology ... 24
Figure 4.1 Stress distribution of NACA 5514 under load pressure 0.5 MPa. ... 25
Figure 4.2 Results validation ... 26
Figure 4.3 Influenced of tip chord length in the stress generation ... 27
Figure 4.4 Stress distribution of NACA 5505, tip chord length 110 mm ... 27
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xiiFigure 4.10 Influenced of twisting angle in stress generation for all tip chord length ... 31 Figure 4.11 Maximum stress of proposed model in variation of tip chord
length ... 33 Figure 4.12 Stress distribution of proposed model of NACA 5505, tip of
chord length 84 mm ... 33 Figure 4.13 Stress distribution of proposed model of NACA 5505, tip of
chord length 110 mm ... 34 Figure 4.14 Maximum stress comparison between proposed model, 40o
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xiii TABLE LISTTable 3.1 Aluminum 6061-T91 properties ... 17 Table 3.2 Some exported points from NACA 5 Digits Series Profile
