بسم اهلل الرحمن الرحيم Sudan University of Science and Technology Faculty of Engineering Aeronautical Engineering Department Study of blended wing body design concept Thesis Submitted in Partial Fulfillment of the Requirements for the Degree of Bachelor of Science. (BSc Honor) By: 1. REEM MOHAMMED ABDELGAFFER ABDALLAH 2. SAMAR MOHAMMED EBAID HASSAB-ELSEED 3. SHOWG IDRIS JAFER TAHA Supervised By: October 2016 اﻵيــــة قال تعالى: بسم اهلل الرحمن الرحيم }وَابْتَغِ فِيمَا آتَاكَ اللَّهُ الدَّارَ الْآخِرَةَ * وَلَا تَنْسَ وَصِيبَلَ مِهَ الدُّوْيَا * وَأَحْسِهْ مَمَا أَحْسَهَ اللَّهُ إِلَيْلَ ۖ* وَلَا تَبْغِ الْفَسَادَ فِي الْؤَرْضِ * إِنَّ اللَّهَ لَا يُحِبُّ الْمُفْسِدِيهَ{ صدق اهلل العظيم سورة القصص اﻵيت }77{ I Abstract This thesis represents a simple study of the design concept of a new generation of civilian aircrafts called "BLENDED WING BODY" aircraft , which are meant to replace the current cylindrical figure aircrafts in the sooner future . The search and study began with the conceptual design phase , taking both AIRBUS 380 & BOEING 747 & BOEING 777 as design references as they are all of the same weight and passenger capacity (500) . The design process started by setting the requirements based on historical data mostly, following all the conceptual design stages till the 3D-VIEWS was obtained. Going through airfoil selection , mission , weight estimation to the performance analysis of the aircraft which is mentioned in details . To conclude this study, this type of aircrafts has less fuel consumption and a better performance when compared to conventional aircrafts. However , the only problem that had to be dealt with was the airfoil selection which was solved at the drawing phase . with a better solutions proposed for any future work. II Acknowledgement Foremost , we would like to express our sincere gratitude to our advisor Mr.Abdelsameea for the continuous support of our thesis study and research , for his patience , motivation , enthusiasm , and immense knowledge . his guidance helped us in all the time of research and writing of this thesis . we could not have imagined having a better advisor and mentor for our study . Miss.raheegwahby has been an inspiration . her sage advice , insightful criticisms , and patient encouragement aided the writing of this thesis in innumerable ways. we would also like to thank Mr.mohammedmahmoud whose steadfast support of this project was greatly needed and deeply appreciated. Last but not least , we would like to thank whoever supported our idea and encourage us to keep working despite the harden ships. We are forever grateful . III Dedication Every challenging work needs self-efforts as well as guidance of elders especially those who are very close to our hearts. Our humble effort , we dedicate to our loving families. Mother , father , brothers & sisters Whose affection , love , encouragement and prays of day and night makes us able to get such success and honor. Along with all the hard working and respected teachers. IV Contents I .......................................................................................................................... اﻵيــــة Abstract ..................................................................................................................... II Acknowledgement .................................................................................................... III Dedication ................................................................................................................ IV Contents .................................................................................................................... V List of figures ........................................................................................................... IX List of tables .............................................................................................................. X List of Symbols ........................................................................................................ XI Chapter 1 : INTRODUCTION ................................................................................... 1 1.1 Overview .......................................................................................................... 1 1.2 PROBLEM STATEMENT ............................................................................... 2 1.3 Aim and Objective ........................................................................................... 2 1.3.1 Aim ........................................................................................................... 2 1.3.2 Objectives .................................................................................................. 2 1.4 METHODOLOGY ........................................................................................... 2 1.5 OUTLINES ...................................................................................................... 2 Chapter 2 : literature Review ..................................................................................... 3 2.1 Difference between a blended wing body and a flying wing ............................. 3 2.2 Negative factors of a BWB Configuration Design ............................................ 9 2.3 Difficulties in Designing a BWB .................................................................... 10 2.4 Environmental benefits ................................................................................... 12 2.6 Advantages of BWB....................................................................................... 13 2.6.1 Aerodynamics .......................................................................................... 13 2.6.2 Aero-structures ........................................................................................ 14 2.6.3 Noise Reduction ...................................................................................... 14 2.6.4 Marketing And Manufacturing : ............................................................... 15 2.6.5 Size:......................................................................................................... 15 2.6.6 Application: ............................................................................................. 15 2.6.7 Safety : .................................................................................................... 16 2.6.8 Stability And Flight Control : ................................................................... 16 2.6.9 Other : ..................................................................................................... 16 2.7 Disadvantages of BWB : ................................................................................ 16 V 2.7.1 Aerodynamics : ........................................................................................ 16 2.7.2 Propulsion................................................................................................ 17 2.7.3 Structures ................................................................................................. 17 2.7.4 Stability And Flight Control ..................................................................... 18 2.7.5 Marketing And Manufacturing : ............................................................... 18 2.7.6 Certification ............................................................................................. 18 2.7.7 Other ....................................................................................................... 19 2.8 PREVIOUS WORK ....................................................................................... 20 2.8.1 NASA Projects (USA) : ........................................................................... 20 2.8.2 Multidisciplinary OptimisationOf A Blended Wing Body (MOB) Project (Europe) ........................................................................................................... 21 2.8.3 Tohoku University (Japan) : ..................................................................... 23 2.8.4 TsAGI (Russia) : ...................................................................................... 23 2.8.5 MIT/Cambridge Silent Aircraft Initiative (SAI) (USA/UK) : ................... 23 2.8.6 Universidad Politecnica de Madrid (Spain) : ............................................ 24 2.8.7 Airbus Projects (Europe) .......................................................................... 24 2.9 LIST OF BLENDED WING BODY AIRCRAFTS ........................................ 26 2.9.1 Westland Dreadnought ............................................................................. 26 2.9.2 Stout Batwing .......................................................................................... 27 2.9.3 Northrop Grumman X-47A Pegasus......................................................... 28 2.9.4 Miles M.30 .............................................................................................. 29 2.9.5 McDonnell XP-67 .................................................................................... 30 Final design ...................................................................................................... 30 Project cancellation .......................................................................................... 31 2.9.6 Lockheed Martin RQ-170 Sentinel ........................................................... 32 2.9.7 Lockheed Martin RQ-3 DarkStar ............................................................. 34 2.9.8 DassaultnEUROn ....................................................................................