Noise Prediction Within Conceptual Aircraft Design PDF Download
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Author: Eberhard-Lothar Bertsch
Publisher:
ISBN:
Category :
Languages : en
Pages : 163
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Author: Eberhard-Lothar Bertsch
Publisher:
ISBN:
Category :
Languages : en
Pages : 163
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Author: John P. Raney
Publisher:
ISBN:
Category :
Languages : en
Pages : 44
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Author: Damaris Zachos
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
The capability to predict aircraft noise is important in the development of acoustically aware aircraft. The first principles noise prediction model developed in this work evaluates medium weight-class aircraft models and a conceptual electric vertical takeoff and landing (eVTOL) design. This work contains four significant system improvements over the previous version of the noise prediction system: the incorporation of a dual compact thickness noise model, a standardized command file generation system for PSUHeloSim, an improved trim matrix solution for the HeloSim model, and the capability to "calibrate" broadband noise predictions. These enhancements, along with the definition of new helicopter models developed in this work will be described. Multiple helicopters were used to validate the noise prediction system. The Sikorsky S-76D and Bell 205 from Phase III of a joint NASA/FAA/ARMY flight test were simulated together with the Bell 407 and Bell 206 models from Phase II test by the same participants. The simulated noise from medium-weight class aircraft, such as the S-76D and Bell 205 was compared with the noise predictions for the lighter weight class aircraft, i.e., the Bell 407 and Bell 206. In particular, the S-76D was compared against the Bell 407 because both aircraft have four-bladed main rotors. The Bell 205 was compared with the Bell 206 because both aircraft have two-bladed main rotors. It was determined that the directionality of the thickness and broadband noise was similar between aircraft of different weight-classes. Loading noise magnitude and directivity changed between light and medium weight-class aircraft. A novel eVTOL concept based on the proposed Jaunt Journey aircraft was modeled in the noise prediction system for multiple steady-flight conditions. Comparisons were made with a baseline propeller to evaluate the effectiveness of a low-noise electric propeller design. The novel eVTOL rotor indicated low thickness and loading noise and significant reduction in broadband noise. A full model of the eVTOL aircraft was used to determine the noise of each of the propellers, main rotor, and full aircraft. The predicted noise of the novel eVTOL indicated lower total noise than a comparable conventional aircraft design.
Author: John P. Raney
Publisher:
ISBN:
Category : Airplane sounds
Languages : en
Pages : 24
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Author: Laurent Leylekian
Publisher: Springer
ISBN: 9783030911935
Category : Science
Languages : en
Pages : 321
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Book Description
This open access book provides a view into the state-of-the-art research on aviation noise and related annoyance. The book will primarily focus on the achievements of the ANIMA project (Aviation Noise Impact Management through Novel Approaches), but not exclusively. The content has a broader theme in order to encompass. regulation issues, the ICAO (International Civil Aviation Organization) balanced approach, progresses made on technologies and reduction of noise at source, impact of possible future civil supersonic aircraft, land-use planning issues, as well as the core topics of the ANIMA project, i.e. impact on human beings, annoyance, quality of life, health and findings of the project in this respect. This book differs from traditional research programmes on aviation noise as the authors endeavour, not to lower noise at source, but to reduce the annoyance. This book examines these non-acoustic factors in an effort to help those most affected by aviation noise – communities living close to airports, and also help airport managers, policy-makers, local authorities and researchers to deal with this issue holistically. The book concludes with some recommendations for EU, national and local policy-makers, airport and aviation authorities, and more broadly a scientifically literate audience. These recommendations may help to identify gaps for progress in terms of research but also genuine implementation actions for political and regulatory authorities.
Author: Jason Blinstrub
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Oleksandr Zaporozhets
Publisher: CRC Press
ISBN: 0203888820
Category : Technology & Engineering
Languages : en
Pages : 432
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Book Description
Aircraft noise has adverse impacts on passengers, airport staff and people living near airports, it thus limits the capacity of regional and international airports throughout the world. Reducing perceived noise of aircraft involves reduction of noise at source, along the propagation path and at the receiver. Effective noise control demands highly s
Author: Roberto Camussi
Publisher: Springer Science & Business Media
ISBN: 3709114586
Category : Technology & Engineering
Languages : en
Pages : 453
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Book Description
The articles in this volume present the state-of-the-art in noise prediction, modeling and measurement. The articles are partially based on class notes provided during the course `Noise sources in turbulent shear flows', given at CISM on April 2011. The first part contains general concepts of aero acoustics, including vortex sound theory and acoustic analogies, in the second part particular emphasis is put into arguments of interest for engineers and relevant for aircraft design: jet noise, airfoil broadband noise, boundary layer noise (including interior noise and its control) and the concept of noise sources, their theoretical modeling and identification in turbulent lows. All these arguments are treated extensively with the inclusion of many practical examples and references to engineering applications.
Author: Andreas Dillmann
Publisher: Springer
ISBN: 3319272799
Category : Technology & Engineering
Languages : en
Pages : 855
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Book Description
This book presents contributions to the 19th biannual symposium of the German Aerospace Aerodynamics Association (STAB) and the German Society for Aeronautics and Astronautics (DGLR). The individual chapters reflect ongoing research conducted by the STAB members in the field of numerical and experimental fluid mechanics and aerodynamics, mainly for (but not limited to) aerospace applications, and cover both nationally and EC-funded projects. Special emphasis is given to collaborative research projects conducted by German scientists and engineers from universities, research-establishments and industries. By addressing a number of cutting-edge applications, together with the relevant physical and mathematics fundamentals, the book provides readers with a comprehensive overview of the current research work in the field. Though the book’s primary emphasis is on the aerospace context, it also addresses further important applications, e.g. in ground transportation and energy.
Author: Jan Roskam
Publisher: DARcorporation
ISBN: 9781884885549
Category : Aerospace engineering
Languages : en
Pages : 372
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Book Description
