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Dissertations / Theses on the topic 'Blended-wing-body aircraft'

Author: Grafiati

Published: 4 June 2021

Last updated: 19 February 2022

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1

Okonkwo, Paulinus Peter Chukwuemeka. "Conceptual design methodology for blended wing body aircraft." Thesis, Cranfield University, 2016. http://dspace.lib.cranfield.ac.uk/handle/1826/10132.

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The desire to create an environmentally friendly aircraft that is aerodynamically efficient and capable of conveying large number of passengers over long ranges at reduced direct operating cost led aircraft designers to develop the Blended Wing Body(BWB) aircraft concept. The BWB aircraft represents a paradigm shift in the design of aircraft. The design offers immense aerodynamics and environmental benefits and is suitable for the integration of advanced systems and concepts like laminar flow technology, jet flaps and distributed propulsion. However, despite these benefits, the BWB is yet to b

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2

Ikeda, Toshihiro, and toshi ikeda@gmail com. "Aerodynamic Analysis of a Blended-Wing-Body Aircraft Configuration." RMIT University. Aerospace, Mechanical and Manufacturing Engineering, 2006. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20070122.163030.

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In recent years unconventional aircraft configurations, such as Blended-Wing-Body (BWB) aircraft, are being investigated and researched with the aim to develop more efficient aircraft configurations, in particular for very large transport aircraft that are more efficient and environmentally-friendly. The BWB configuration designates an alternative aircraft configuration where the wing and fuselage are integrated which results essentially in a hybrid flying wing shape. The first example of a BWB design was researched at the Loughead Company in the United States of America in 1917. T

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3

Vavalle, Armando. "Response surface aerodynamic optimisation for blended wing body aircraft." Thesis, Cranfield University, 2005. http://dspace.lib.cranfield.ac.uk/handle/1826/11015.

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This study is concerned with a methodology for the aerodynamic analysis and preliminary design of a novel configuration for high subsonic civil transport, based on the flying wing concept, known a Blended Wing Body (BWB). A response surface based optimisation method is developed, enabling the designer to monitor the effect of shape modification on the controllability of the aircraft in both longitudinal and lateral/directional motion and on the Wing structural weight, while maximising the aerodynamic efficiency. The design aspects considered included high- speed aerodynamics, flight static-sta

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4

Ur, Rahman Naveed. "Propulsion and flight controls integration for the blended wing body aircraft." Thesis, Cranfield University, 2009. http://hdl.handle.net/1826/4095.

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The Blended Wing Body (BWB) aircraft offers a number of aerodynamic perfor- mance advantages when compared with conventional configurations. However, while operating at low airspeeds with nominal static margins, the controls on the BWB aircraft begin to saturate and the dynamic performance gets sluggish. Augmenta- tion of aerodynamic controls with the propulsion system is therefore considered in this research. Two aspects were of interest, namely thrust vectoring (TVC) and flap blowing. An aerodynamic model for the BWB aircraft with blown flap effects was formulated using empirical and vortex

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5

Kays, Cory Asher. "Multidisciplinary methods for performing trade studies on blended wing body aircraft." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/82485.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2013.<br>This electronic version was submitted and approved by the author's academic department as part of an electronic thesis pilot project. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from department-submitted PDF version of thesis<br>Includes bibliographical references (p. 99-102).<br>Multidisciplinary design optimization (MDO) is becoming an essential tool for the design of engineering systems due to the inherent coupling between discipline an

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6

Dippold, Vance Fredrick III. "Numerical Assessment of the Performance of Jet-Wing Distributed Propulsion on Blended-Wing-Body Aircraft." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/34878.

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<p> Conventional airliners use two to four engines in a Cayley-type arrangement to provide thrust, and the thrust from these engines is typically concentrated right behind the engine. Distributed propulsion is the idea of redistributing the thrust across most, or all, of the wingspan of an aircraft. This can be accomplished by using several large engines and using a duct to spread out the exhaust flow to form a jet-wing or by using many small engines spaced along the span of the wing. Jet-wing distributed propulsion was originally suggested by Kuchemann as a way to improve propulsive effici

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7

Ko, Yan-Yee Andy. "The Multidisciplinary Design Optimization of a Distributed Propulsion Blended-Wing-Body Aircraft." Diss., Virginia Tech, 2003. http://hdl.handle.net/10919/27257.

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The purpose of this study is to examine the multidisciplinary design optimization (MDO) of a distributed propulsion blended-wing-body (BWB) aircraft. The BWB is a hybrid shape resembling a flying wing, placing the payload in the inboard sections of the wing. The distributed propulsion concept involves replacing a small number of large engines with many smaller engines. The distributed propulsion concept considered here ducts part of the engine exhaust to exit out along the trailing edge of the wing. The distributed propulsion concept affects almost every aspect of the BWB design. Methods to m

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8

van, Wyk David. "Guidance, navigation and control of a small, unmanned blended wing body aircraft." Master's thesis, Faculty of Engineering and the Built Environment, 2020. http://hdl.handle.net/11427/32426.

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The purpose of this research is to document the design and optimisation of a full suite of guidance, navigation and control (GNC) algorithms for a small unmanned aerial vehicle (UAV), the Skywalker X8. This was performed so as to fill a void in the available literature on the selected airframe, which currently only focuses on aspects such as aerodynamic modelling, advanced controller design, or uses of the airframe to perform higher level tasks. All of these research areas make use of off-the-shelf flight controllers, but these are not always the most appropriate foundations for more advanced

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9

de, Castro Helena V. "Flying and handling qualities of a fly-by-wire blended-wing-body civil transport aircraft." Thesis, Cranfield University, 2003. http://hdl.handle.net/1826/119.

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The blended-wing-body (BWB) configuration appears as a promising contender for the next generation of large transport aircraft. The idea of blending the wing with the fuselage and eliminating the tail is not new, it has long been known that tailless aircraft can suffer from stability and control problems that must be addressed early in the design. This thesis is concerned with identifying and then evaluating the flight dynamics, stability, flight controls and handling qualities of a generic BWB large transport aircraft concept. Longitudinal and lateral-directional static and dynamic stability

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10

Hanlon, Christopher J. (Christopher Joseph) 1978. "Engine design implications for a blended wing-body aircraft with boundary later ingestion." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/82759.

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11

Vora, Jay Abhilash. "Blended Wing Design Considerations for A Next Generation Commercial Aircraft." Wright State University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=wright1557920109832295.

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12

Wang, Faliang. "The comparison of aerodynamic and stability characteristics between conventional and blended wing body aircraft." Thesis, Cranfield University, 2012. http://dspace.lib.cranfield.ac.uk/handle/1826/7306.

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Aircraft with advanced wing geometry, like the flying wing or blended wing body configuration, seems to be the seed candidate of future aircraft. Compared with conventional aircraft, there are significant aerodynamic performance improvements because of its highly integrated wing and fuselage configuration. On the other hand, due to its tailless configuration, the stability characteristics are not as good as conventional aircraft. The research aims to compare the aerodynamic and stability characteristics of conventional, flying wing and blended wing body aircraft. Based on the same requirement—

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13

Blaauw, Deon. "Flight control system for a variable stability blended-wing-body unmanned aerial vehicle." Thesis, Stellenbosch : University of Stellenbosch, 2009. http://hdl.handle.net/10019.1/2297.

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Thesis (MScEng (Electrical and Electronic Engineering))--University of Stellenbosch, 2009.<br>This thesis presents the analysis, design, simulation and practical implementation of a novel control system for a variable stability blended-wing-body unmanned aerial vehicle. The aircraft has a moveable centre of mass that allows it to operate in an aerodynamically optimised minimum drag configuration during cruise flight. The primary purpose of the control system is thus to regain nominal static stability for all centre of mass positions, and then to further regulate motion variables for auton

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14

Leifsson, Leifur Thor. "Multidisciplinary Design Optimization of Low-Noise Transport Aircraft." Diss., Virginia Tech, 2005. http://hdl.handle.net/10919/26327.

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The objective of this research is to examine how to design low-noise transport aircraft using Multidisciplinary Design Optimization (MDO). The subject is approached by designing for low-noise both implicitly and explicitly. The explicit design approach involves optimizing an aircraft while explicitly constraining the noise level. An MDO framework capable of optimizing both a cantilever wing and a Strut-Braced-Wing (SBW) aircraft was developed. The framework employs aircraft analysis codes previously developed at the Multidisciplinary Design and Analysis (MAD) Center at Virginia Tech (VT). The

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15

Kirner, Rudi. "An investigation into the benefits of distributed propulsion on advanced aircraft configurations." Thesis, Cranfield University, 2013. http://dspace.lib.cranfield.ac.uk/handle/1826/8599.

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Radical aircraft and propulsion system architecture changes may be required to continue historic performance improvement rates as current civil aircraft and engine technologies mature. Significant fuel-burn savings are predicted to be achieved through the Distributed Propulsion concept, where an array of propulsors is distributed along the span of an aircraft to ingest boundary layer air and increase propulsive efficiency. Studies such as those by NASA predict large performance benefits when integrating Distributed Propulsion with the Blended Wing Body aircraft configuration, as this planform

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16

Garmendia, Daniel Charles. "A multi-disciplinary conceptual design methodology for assessing control authority on a hybrid wing body configuration." Diss., Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/54328.

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The primary research objective was to develop a methodology to support conceptual design of the Hybrid Wing Body (HWB) configuration. The absence of a horizontal tail imposes new stability and control requirements on the planform, and therefore requiring greater emphasis on control authority assessment than is typical for conceptual design. This required investigations into three primary areas of research. The first was to develop a method for designing an appropriate amount of redundancy. This was motivated widely varying numbers of trailing edge elevons in the HWB literature, and inadequ

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17

Peterson, Timothy Shaw. "Handling Qualities of a Blended Wing Body Aircraft." Thesis, 2011. http://hdl.handle.net/1807/31384.

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The blended wing body (BWB) is a tailless aircraft with the potential to use 27% less fuel than a conventional aircraft with the same passenger capacity and range. The primary purpose of the current study was to determine the handling qualities of the BWB, using piloted-handling trials in a moving-base simulator. The secondary purpose was to determine the effect of simulator motion on handling-quality ratings. De Castro conducted piloted-handling trials in a fixed-base simulator. De Castro's tasks and flight model were modified in the current study. In the current study, three subjects rated t

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18

Kuntawala, Nimeesha B. "Aerodynamic Shape Optimization of a Blended-wing-body Aircraft Configuration." Thesis, 2011. http://hdl.handle.net/1807/31289.

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Increasing environmental concerns and fuel prices motivate the study of alternative, unconventional aircraft configurations. One such example is the blended-wing-body configuration, which has been shown to have several advantages over the conventional tube-and-wing aircraft configuration. In this thesis, a blended-wing-body aircraft is studied and optimized aerodynamically using a high-fidelity Euler-based flow solver, integrated geometry parameterization and mesh movement, adjoint-based gradient evaluation, and a sequential quadratic programming algorithm. Specifically, the aircraft is optimi

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19

Wang, Wen-Yu, and 王文佑. "Aerodynamic Optimisation Analysis of a Modern Blended-Wing-Body Transport Aircraft." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/75265033948095808751.

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碩士<br>淡江大學<br>航空太空工程學系碩士班<br>98<br>Aircraft manufacture companies have introduced new aircrafts with high fuel-efficiency to reduce the operation cost of flight vehicle in recent years; the blended-wing-body (BWB) aircraft is another solution besides the strategies of the improvement in structure/material and aircraft enlargement. But we cannot grasp the characteristics of manufacturing; flight efficiency, etc.; because the configuration of BWB is so different from the conventional one. So in recent years the related researches about this modern BWB aircraft become the topic of many research p

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20

Song, Bo-Chang, and 宋柏璋. "Aerodynamic Performance Study of Blended-Wing-Body Aircraft under Severe Weather Conditions." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/92818250055945589514.

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碩士<br>淡江大學<br>航空太空工程學系碩士班<br>98<br>The goal of aircraft design is to achieve safe and efficient flight. In the world of civilian air transport, efficient, economically attractive configurations are urgently needed. As for civilian commercial aircrafts, studies have shown remarkable performance improvements for the Blended Wing Body (BWB) over conventional subsonic transport. On the other hand, global warming has led to extreme weather around the world frequently, if aircraft taking-off and landing will unavoidably meet with the strong crosswind or/and heavy rain, then aircraft designer must pu

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21

Chen, Yung-Sung, and 陳永松. "On the Optimization of Blended Wing Body Aircraft Configuration via the Surrogate Modeling Method." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/a7fj7s.

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碩士<br>淡江大學<br>航空太空工程學系碩士班<br>101<br>In pace with the modern airplane development motivated by fuel efficiency and environmental conservation, many different aircraft configurations and design concepts are created in last two decades to accommodate these challenges. Blended Wing Body aircrafts (BWB) are created for the same reason, and remains to be one of the most promising flight vehicle concepts for future generations to come. But this plane are seldom seen, people are still study its aerodynamic analysis at the beginning stage, moreover the aerodynamic performance of BWB with its engines on

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22

Yang, Hei, and 楊海. "Aerodynamic Performance Investigation of a Modern Blended-Wing-Body Aircraft under the Influence of Heavy Rain Condition." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/76518307468027373261.

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碩士<br>淡江大學<br>航空太空工程學系碩士班<br>97<br>The detrimental effects of some meteorological phenomenon such as wind shear, thunderstorm, ice/snow etc, to aviation safety are relatively well known. But aerodynamic influences due to heavy rain are still the on-going research subject, and needs further investigation. But for the past decades there are neither experimental nor numerical researches about heavy rain except our research team conducted at 2003 and 2008. This paper first reviews some research findings in creating a geometrical model of Blended-Wing-Body configuration and its aerodynamic performa

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