FABRICATION OF A VALVELESS PULSEJET ENGINE

Project submitted in the partial fulfillment of the award of the degree OfBachelor of TechnologyInAERONAUTICAL ENGINEERINGOfMahatma Gandhi UniversityByAROMAL 11011018 BRITO MENDEZ 11011021 JAFARALI 11011024 JOBIN SAMUEL 11011026 Under the guidance ofVISHNU SASIDHARAN

March 2015

DEPARTMENT OF AERONAUTICAL ENGINEERINGMount Zion College of Engineering Kadamannitta, Pathanamthitta 689 649Phone: 0468 2217525, 2217325 Fax: 2217425

MAHATHMA GANDHI UNIVERSITY, KOTTAYAM

MOUNT ZION COLLEGE OF ENGINEERINGKADAMANITTA

DEPARTMENT OF AERONAUTICAL ENGINEERING

CERTIFICATE Certified that this is a bonafide record of the work done by Aromal (11011018), Brito Mendez (11011021), Jafarali KP (11011024), Jobin Samuel (11011026),Of Eighth semester Aeronautical Engineering for the project (AN010 710) title FABRICATION OF A VALVELESS PULSEJET ENGINE in the year 2014-15.

Mr.M.YogeshHEAD OF THE DEPARTMENT Assistant ProfessorDepartment of Aeronautical Engineering

Mr.Vishnu SasidharanPROJECT COORDINATOR Assistant ProfessorDepartment of Aeronautical EngineeringAcknowledgement

To bring something into existence is truly the work of ALMIGHTY. We thank GOD ALMIGHTY for making this venture a success. We express our wholehearted thanks to the Management of the college, Mr. Abraham Kalammannil, Chairman, for providing us an opportunity to do our studies in this esteemed institution. We thank our Principal Dr.N.Rajaram for providing the facilities for our studies and constant encouragement in all achievements.

At the outset we wish to place on record our sincere thanks to quite a few people without whose help, this venture would not have been a success.

We would like to express profound gratitude to our Head of the Department, Mr. M. Yogesh , for his encouragement and for providing all facilities for carrying out this project. We express our highest regard and sincere thanks to our project coordinator, Mr. Vishnu Sasidharan ,who provided the necessary guidance and serious advice to carry out this project. We also extend our sincere thanks to all the staff members of Aeronautical Department who guided us throughout the entire course.

CONTENTS

Sl.No. TITLE PAGE NO

ABSTRACTLIST OF FIGURES

1INTRODUCTION 1 1.1 DESCRIPTION OF PULSE COMBUSTION 1

2 LITERATURE SURVEY 5

2.1 STUDY OF EXISTING SYSTEM 5 2.2 LIMITATIONS OF EXISTING SYSTEM 8 2.3 STUDY OF PROPOSED SYSTEM 9 2.4 TYPES OF PULSE JET ENGINES 9

3 TYPES OF VALVELESS PULSEJETS 13

3.2 INLINE SYSTEMS 13

3.2 U-SHAPED SYSTEM 15

3.3 LINEAR SYSTEM 16

COMPONENTS AND SYSTEM DESCRIPTION 18 4.1 SPARK PLUG 18

4.2 COMBUSTION CHAMBER 20

Principle of Operation 23

5.1 Rijke Tube 23

5.2 The Helmholtz Resonator 26 OPERATION OF A VALVELESS PULSE JET ENGINE 30

Working of a Valveless Pulse Jet Engine 347.1 Thermodynamic cycle 36

OBJECT AND APPROACH 42

8.1 kadenacy effect 43

8.2 Propagation of Sound in Pulse Jets 44

DESIGNING AND MODELING 48

9.1 CAD/CAE 48

9.2 MODELING 49

9.3 SOFTWARES USED FOR MODELING 49

9.4 materials employed 53

9.5 MANUFACTURING PROCESS 54

9.6 iNSPECTION 65

9.7 ASSEMBLY 66

ADVANTAGES 67 DISADVANTAGES 68

APPLICATIONS 69

CONCLUSION 70

REFERENCE

ABSTRACT

Pulsejet engine is a type of air breathing engine. The combustion takes place in the form of pulses in the combustion chamber that is 300 times per second. Pulsejet engines were commonly used in the military purposes in which Germans were able to produce a thrust of 300 pounds carrying a load of two tones. Usually pulsejet engine is the two type valved and valveless engine. The valved type consists of single moving part valve which controls the flow of fresh air in to the combustion chamber .The valveless engine is hollow type with Zero moving parts .Recently a research is going on over PDE (Pulse Detonation Engine) in NASA which is believed that its more efficient when compared to conventional turbojet engines.in this project. we created 3D model & Animation is done by CREO 1.0 Software.

i LIST OF FIGURES

FIGURE NO FIGURE NAME PAGE NO.

1.1General Pulse Combustion Process 21.2Combustion Chamber Explosion 32.1Typical Jet Engine Interior 72.2Schematic of Pulse Jet Combustion Process 102.3Valved Pulsejet Engine 112.4 Valveless Pulsejet Engine 123.1 Marconnets Valveless Pulsejet Engine 143.2 Schuberts Valveless Pulsejet Engine 14 3.3U-Shaped Lockwood Hiller Engine 153.4Capped Tube Argus Engine 174.1 Rijkes Tube 234.2Working of A Rijkes Tube 254.3Helmholtz Resonator 274.4 A Classic Helmholtz Resonator 286.1 Valveless Pulse Jet During Operation 307.1 Working of Valveless Pulse Jet Engine 347.2 Layout Of A Valveless Pulsejet Engine 357.3 Lenoir Cycle 377.4 Comparison of Conical Sections 387.5 Lockwood Hiller Combustion Chamber 397.6 Logan Combustion Chamber Section 397.7 Standard Exhaust Runner Design 407.8 Sudden Expansion Exit Condition 417.9 Entrance Flow Condition 418.1 Propagation of Sound During Operation 428.2 Kadenacy Effect 438.3 Standing Wave 449.1 Model representation in Creo 529.2 Manufacturing Process 549.3 Metal Cutting 559.4 Lathe Machine 569.5 Sawing Machine 589.6 Welding Process 589.7 Welding Operation 60 9.8 Drilling Process 629.9 Drilling Machine 649.10 Flow Chart of Manufacturing Process 659.11 Detailed Design 66

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