› › Aerodynamic Study Design And Construction Of A Blended Wing Body Bwb Unmanned Aircraft Ua

Aerodynamic Study, Design and Construction of a Blended Wing Body (BWB) Unmanned Aircraft (UA)

Author : Aleix De Toro Diaz

Publisher :

Page : pages

File Size : 23,7 MB

Release : 2015

Category :

ISBN :

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Book Description

During this project a Blended Wing Body (BWB) UA (Unmanned Aircraft) model is built. BWBs are a combination of a common airplane with tail control surfaces and a flying wing. BWBs lack tail control surfaces, which makes its design to be very different and more complex regarding stability. To first start the BWB design, some research has been done about the basic parameters of the BWB designs. Moreover, different airfoils are considered to improve the stability of the UA. Two designs are created and simulated with Computational Fluid Dynamics software: ANSYS Fluent. With this software, the basic aerodynamic parameters of the BWB models are obtained, i.e., the lift coefficient, drag coefficient and moment coefficients. A design is shown to be more efficient than the other one. Once the best model is selected, the CAD geometry is cut into different parts in order to allow a 3D printer to print the whole model in pieces. Once all the pieces are printed, the UA is assembled in three main parts (main fuselage, right and left wing) The next step is making the mould. As the 3D printed model has many imperfections, the plastic model should be puttied and sanded several times to achieve a smooth finish. The mould is made with glass fibre. The 3D plastic model is covered with resin and fiberglass. Finally when the mould is finished, Carbon fibre is used to build the UA in the mould. With all the simulations done it has been possible to know where the neutral point is and then locating the center of gravity. It has also been ensured that the UA can be trimmed at a desired angle of attack with any deflection of elevons. Moreover it has been learnt how to work with composite materials as well as organizing a project that involves so many areas. Since the beginning of this work the idea was going focus on more practical stuffs as well as combining it with theoretical knowledge. This has been possible and a composite UA has been built properly.



Modeling and Control for a Blended Wing Body Aircraft

Author : Martin Kozek

Publisher : Springer

Page : 308 pages

File Size : 37,45 MB

Release : 2014-10-27

Category : Technology & Engineering

ISBN : 3319107925

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Book Description

This book demonstrates the potential of the blended wing body (BWB) concept for significant improvement in both fuel efficiency and noise reduction and addresses the considerable challenges raised for control engineers because of characteristics like open-loop instability, large flexible structure, and slow control surfaces. This text describes state-of-the-art and novel modeling and control design approaches for the BWB aircraft under consideration. The expert contributors demonstrate how exceptional robust control performance can be achieved despite such stringent design constraints as guaranteed handling qualities, reduced vibration, and the minimization of the aircraft’s structural loads during maneuvers and caused by turbulence. As a result, this innovative approach allows the building of even lighter aircraft structures, and thus results in considerable efficiency improvements per passenger kilometer. The treatment of this large, complex, parameter-dependent industrial control problem highlights relevant design issues and provides a relevant case study for modeling and control engineers in many adjacent disciplines and applications. Modeling and Control for a Blended Wing Body Aircraft presents research results in numeric modeling and control design for a large, flexible, civil BWB aircraft in the pre-design stage as developed within the EU FP7 research project ACFA 2020. It is a useful resource for aerospace and control engineers as it shows the complete BWB aircraft modeling and control design process, carried out with the most recent tools and techniques available. presents research results in numeric modeling and control design for a large, flexible, civil BWB aircraft in the pre-design stage as developed within the EU FP7 research project ACFA 2020. It is a useful resource for aerospace and control engineers as it shows the complete BWB aircraft modeling and control design process, carried out with the most recent tools and techniques available. Advances in Industrial Control aims to report and encourage the transfer of technology in control engineering. The rapid development of control technology has an impact on all areas of the control discipline. The series offers an opportunity for researchers to present an extended exposition of new work in all aspects of industrial control.





Small Unmanned Fixed-wing Aircraft Design

Author : Andrew J. Keane

Publisher : John Wiley & Sons

Page : 545 pages

File Size : 11,50 MB

Release : 2017-08-17

Category : Technology & Engineering

ISBN : 1119406315

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Book Description

Small Unmanned Fixed-wing Aircraft Design is the essential guide to designing, building and testing fixed wing UAVs (or drones). It deals with aircraft from two to 150 kg in weight and is based on the first-hand experiences of the world renowned UAV team at the UK’s University of Southampton. The book covers both the practical aspects of designing, manufacturing and flight testing and outlines and the essential calculations needed to underpin successful designs. It describes the entire process of UAV design from requirements definition to configuration layout and sizing, through preliminary design and analysis using simple panel codes and spreadsheets to full CFD and FEA models and on to detailed design with parametric CAD tools. Its focus is on modest cost approaches that draw heavily on the latest digital design and manufacturing methods, including a strong emphasis on utilizing off-the-shelf components, low cost analysis, automated geometry modelling and 3D printing. It deliberately avoids a deep theoretical coverage of aerodynamics or structural mechanics; rather it provides a design team with sufficient insights and guidance to get the essentials undertaken more pragmatically. The book contains many all-colour illustrations of the dozens of aircraft built by the authors and their students over the last ten years giving much detailed information on what works best. It is predominantly aimed at under-graduate and MSc level student design and build projects, but will be of interest to anyone engaged in the practical problems of getting quite complex unmanned aircraft flying. It should also appeal to the more sophisticated aero-modeller and those engaged on research based around fixed wing UAVs.



Blended Wing Design Considerations for a Next Generation Commercial Aircraft

Author : Jay Abhilash Vora

Publisher :

Page : 71 pages

File Size : 22,37 MB

Release : 2019

Category : Aerodynamics

ISBN :

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Book Description

The current aircraft design has not changed significantly in the last few decades. Growing environmental concerns and fuel prices are driving manufacturers to develop unconventional but efficient aircraft configurations. The blended wing body (BWB) configuration provides an alternate and more efficient means of subsonic travel. The BWB aircraft replaces the traditional wings and fuselage with hybrid wing shape where the fuselage and wings have integrated. Major aircraft manufacturers are researching the BWB concept incorporating electric propulsion for civil transport use. In this research a 300 passenger BWB aircraft aerodynamic shape is designed. This aircraft is used to assess the aerodynamic efficiency of the BWB design over a conventional tube aircraft design. The study utilizes Computational Fluid Dynamics (CFD) tools to analyze the fluid flow at different angles of attack for the BWB geometry. A conceptual BWB aircraft was designed using the parameters of a conventional aircraft configuration. During the design, the compatibility of the BWB aircraft with the current airports was also considered. The 3D Computer Aided Design (CAD) software SolidWorks was used to create the BWB design. ANSYS Fluent was used to perform the computational aerodynamic analysis. Aerodynamic flow parameters were investigated to determine the feasibility of a BWB aircraft for commercial flight.



Foundations of Circulation Control Based Small-Scale Unmanned Aircraft

Author : Konstantinos Kanistras

Publisher : Springer

Page : 147 pages

File Size : 32,1 MB

Release : 2017-11-02

Category : Technology & Engineering

ISBN : 3319678523

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Book Description

This book focuses on using and implementing Circulation Control (CC) - an active flow control method used to produce increased lift over the traditionally used systems, like flaps, slats, etc. - to design a new type of fixed-wing unmanned aircraft that are endowed with improved aerodynamic efficiency, enhanced endurance, increased useful payload (fuel capacity, battery cells, on-board sensors) during cruise flight, delayed stall, and reduced runway during takeoff and landing. It presents the foundations of a step-by-step comprehensive methodology from design to implementation and experimental testing of Coandǎ based Circulation Control Wings (CCWs) and CC system, both integral components of the new type of aircraft, called Unmanned Circulation Control Air Vehicle. The methodology is composed of seven coupled phases: theoretical and mathematical analysis, design, simulation, 3-D printing/prototyping, wind tunnel testing, wing implementation and integration, and flight testing. The theoretical analysis focuses on understanding the physics of the flow and on defining the design parameters of the geometry restrictions of the wing and the plenum. The design phase centers on: designs of Coandǎ surfaces based on wing geometry specifications; designing and modifying airfoils from well-known ones (NACA series, Clark-Y, etc.); plenum designs for flow uniformity; dual radius flap designs to delay flow separation and reduce cruise drag. The simulation phase focuses on Computational Fluid Dynamics (CFD) analysis and simulations, and on calculating lift and drag coefficients of the designed CCWs in a simulation environment. 3-D printing and prototyping focuses on the actual construction of the CCWs. Wind tunnel testing centers on experimental studies in a laboratory environment. One step before flight testing is implementation of the qualified CCW and integration on the UAV platform, along with the CC system. Flight testing is the final phase, where design validation is performed. This book is the first of its kind, and it is suitable for students and researchers interested in the design and development of CCWs for small-scale aircraft. Background knowledge on fundamental Aerodynamics is required.



Beyond Tube-And-Wing

Author : Bruce Larrimer

Publisher :

Page : pages

File Size : 33,12 MB

Release : 2020-06-15

Category :

ISBN : 9781626830585

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Book Description

This book reviews the remarkable efforts to develop a new aircraft configuration known as the Blended Wing-Body (BWB). Responding to a challenge from NASA, McDonnell Douglas Corporation initiated studies in the early 1990s to determine if this new configuration could bring about significant advantages over conventional sweptwing, streamlined tube, and swept-tail designs. Challenges were identified and this information allowed the design and construction of two small-scale demonstrators: the X-48B. After McDonnell Douglas' merger with Boeing, the X-48B flew 92 test flights before modification into the X-48C, which in turn flew 30 flights under the auspices of NASA's Environmentally Responsible Aviation Program.



Unmanned Aircraft Design

Author : Mohammad Sadraey

Publisher : Morgan & Claypool Publishers

Page : 211 pages

File Size : 40,57 MB

Release : 2017-09-19

Category : Technology & Engineering

ISBN : 168173169X

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Book Description

This book provides fundamental principles, design procedures, and design tools for unmanned aerial vehicles (UAVs) with three sections focusing on vehicle design, autopilot design, and ground system design. The design of manned aircraft and the design of UAVs have some similarities and some differences. They include the design process, constraints (e.g., g-load, pressurization), and UAV main components (autopilot, ground station, communication, sensors, and payload). A UAV designer must be aware of the latest UAV developments; current technologies; know lessons learned from past failures; and they should appreciate the breadth of UAV design options. The contribution of unmanned aircraft continues to expand every day and over 20 countries are developing and employing UAVs for both military and scientific purposes. A UAV system is much more than a reusable air vehicle or vehicles. UAVs are air vehicles, they fly like airplanes and operate in an airplane environment. They are designed like air vehicles; they have to meet flight critical air vehicle requirements. A designer needs to know how to integrate complex, multi-disciplinary systems, and to understand the environment, the requirements and the design challenges and this book is an excellent overview of the fundamentals from an engineering perspective. This book is meant to meet the needs of newcomers into the world of UAVs. The materials are intended to provide enough information in each area and illustrate how they all play together to support the design of a complete UAV. Therefore, this book can be used both as a reference for engineers entering the field or as a supplementary text for a UAV design course to provide system-level context for each specialized topic.



On the Aerodynamic Analysis of a Modern All Electric Powered Blended Wing Body Aircraft with Bird Strike Resistance Device

Author : Huang-Lu Zhan

Publisher :

Page : 186 pages

File Size : 12,65 MB

Release : 2021

Category :

ISBN :

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Book Description

Blended-wind-body (BWB) is one of the most economical aircraft configuration, and all-electric aircraft will be the future mainstream by reducing pollutions. Bird strikes have always been a major aviation safety problem, so a cone-shaped bird-strike prevention net in front of electric fan inlet is invented. Objectives of this study are the aerodynamic analyses of all-electric powered BWB and bird strike resistance net. After validation of DLR F6 model, same numerical simulation tools then applied to our designated configurations. Major research findings are (1) invention of an all-electric ducted-fan with enough thrust produced for take-off and cruise, (2) detailed investigation of BWB's aerodynamic characteristics during cruise (0.7 Mach and FL280) with power on situation, and (3) estimation of its take-off and landing field lengths. It is found that our bird strike resistance net account for about 19% of total drag, and our findings will be helpful for next generation aircraft design, while future optimization of current electric ducted-fan engine and BWB configuration might still be needed, thus represent more potential growth in its aerodynamic performance.



Aerodynamics of Tandem Wing Aircraft

Author : Illia Kryvokhatko

Publisher : Springer Nature

Page : 183 pages

File Size : 49,80 MB

Release : 2023-03-02

Category : Technology & Engineering

ISBN : 3031237773

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Book Description

This book contains extensive data about tandem wing aircraft. It includes a review of modern flying vehicles with four fixed wings, a review of analytical, numerical and experimental methods; results of the studies about aerodynamics; dependencies between geometrical parameters and aerodynamic characteristics, practical recommendations in development and optimizing of tandem wing aircraft to provide high lift-to-drag ratio, stability, and controllability. This is an ideal book for graduate students, researchers, and engineers working in fields of aerodynamics and conceptual design of the aircraft especially UAVs, ground-effect vehicles, and convertiplanes.