scholarly journals A route to learning supersonic aerodynamics in atmospheric flights for engineering students based on a revision of Bloom’s taxonomy

2020 ◽  
Vol 41 (48) ◽  
pp. 60-79
Author(s):  
Felipe RODRIGUEZ ◽  
◽  
Jaime E. ORDUY ◽  
Jorge E. ESPINDOLA ◽  
◽  
...  
Keyword(s):  
Engineering Students ◽  
Aerospace Industry ◽  
Defense Spending ◽  
Commercial Aircraft ◽  
The Third ◽  
Qualified Personnel ◽  
Speed Range ◽  
Computational Fluid Dynamics Cfd ◽  
Aircraft Production ◽  
Supersonic Aerodynamics

According to Deloitte, the global aerospace industry in 2018 experienced a solid year with the demand of passengers and the strengthening of global military spending that continues to increase. Furthermore, it is expected to continue its growth trajectory in 2019 and the following years, led by the growing production of commercial aircraft and strong defense spending. The growth of aircraft production requires the designs to be supported by the knowledge and experience of qualified personnel. In the case of aerodynamic performance, it is evaluated according to the speed range considering incompressible or compressible flow for subsonic and supersonic speeds, respectively. Based on a revision of Bloom´s taxonomy this article proposes a route to learning supersonic aerodynamics for engineering students, considering and discussing the basic literature and technology used in this area of knowledge. The present work is divided into seven parts, beginning with the introduction which includes the main Fundamental concepts of the supersonic systems. The second part deals with Supersonic Aerodynamics Theory, relevant in this learning route; subsequently, the third and fourth part display a brief description of the Experimental supersonic aerodynamics and Computational Fluid Dynamics - CFD is made. Finally, is approached the Bloom´s taxonomy and a revision and is proposed a route to learn supersonic aerodynamics designed for engineering students.

Investigating Flow Inside a Commercial Aircraft Cabin

2002 ◽  
Author(s):  
Rajnish K. Calay ◽  
Simon D. Harris
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Numerical Modeling ◽  
Aerospace Industry ◽  
Hostile Environment ◽  
Complex Environment ◽  
Commercial Aircraft ◽  
Aircraft Cabin ◽  
Environment Control ◽  
Computational Fluid Dynamics Cfd

The Computational Fluid Dynamics (CFD) has been used in the Aerospace Industry as a major tool in designing and manufacturing aircraft, however, for the ventilation flows its use is yet to be established. Modern commercial aeroplanes operate in a physically hostile environment. These airplanes contain a complex Environment control and thermal comfort. Therefore there are several numerical modeling issues regarding simulating flows dominated by thermal and convective currents. The ventilation airflow behaviour of the interior of a Boeing 737 is investigated in this paper using CFD.

Evaluation of TAPS Packages

2010 ◽  
pp. 128-147
Author(s):  
Manjit Singh Sidhu
Keyword(s):  
Problem Solving ◽  
Learning Styles ◽  
Grade Point Average ◽  
Engineering Students ◽  
Target Population ◽  
Grade Point ◽  
Slow Learners ◽  
Undergraduate Engineering ◽  
The Third ◽  
Engineering Mechanics

The evaluation was carried out to examine the distribution of learning styles (discussed in Chapter 2) of the third year undergraduate engineering students and suggest effective problem solving approaches that could increase the motivation and understanding of slow learners at UNITEN. For this study, a sample target population of 60 third year undergraduate engineering students who had taken the Engineering Mechanics subject was tested. These students were selected based on their second year grade point average (GPA) of less than 2.5 as this study emphasizes on slow learners.

Computational Fluid Dynamics (CFD) Within Undergraduate Programs

2007 ◽  
Author(s):  
Kim A. Shollenberger
Keyword(s):  
United States ◽  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Mechanical Engineering ◽  
Manufacturing Industry ◽  
Engineering Students ◽  
Geographic Location ◽  
Undergraduate Curriculum ◽  
The United States ◽  
Computational Fluid Dynamics Cfd

There has been a rapid increase over the past three decades in the use of computational fluid dynamics (CFD) analysis by industry as a tool to design and manufacture products. It is currently a vital part of the engineering process for many companies around the world, and utilized in nearly every manufacturing industry. Employers of engineering students who perform this type of analysis have expressed the need for students at the undergraduate or B.S. level to have some CFD experience. As a result, engineering programs in the United States have begun to respond to this need by developing new curriculum and by exposing students to the use of CFD for research. The level of incorporation and implementation of CFD into the undergraduate curriculum and research at institutions varies widely. The objective of this paper is to conduct a survey of the current use of CFD in the undergraduate curriculum within mechanical engineering departments in the United States. Twenty ABET accredited U.S. schools that offer a B.S. degree in mechanical engineering are investigated in this study that are a representative sample of engineering schools in the U.S. today in terms of admission standards, private versus public, predominate terminal degree, size, and geographic location. Topics investigated include if CFD classes are offered to undergraduates whether they are required or optional, when they are first introduced into the curriculum, number of credit hours dedicated to CFD, types of courses that include CFD, and whether commercial or in-house codes are utilized.

Lateral Rotordynamic Analysis of a Large Alternator/Flywheel/Motor Train

2010 ◽  
Author(s):  
Jawad Chaudhry ◽  
Tim Dimond ◽  
Amir Younan ◽  
Paul Allaire
Keyword(s):  
Critical Speed ◽  
Operating Speed ◽  
Response Level ◽  
Critical Speeds ◽  
The Third ◽  
Unbalance Response ◽  
Speed Range ◽  
Stress Levels ◽  
Full Speed ◽  
Working Day

A large alternator/flywheel/motor train is employed as part of the power system for the ALCATOR C-MOD experiment at the MIT Plasma Fusion Center. The alternator is used to provide peak pulse power of 100 MW to the magnets employed in the fusion experiment. The flywheel diameter is 3.3m and the alternator is 1.8 m in diameter. After being driven up to full speed over a long period of time by a 1491 kW motor, the alternator is rapidly decelerated from approximately 1800 rpm to 1500 rpm during a 2 second interval. This sequence is repeated about six times per working day on average. A full lateral rotordynamic analysis of the including the rotors, fluid film bearings and unbalanced motor magnetic force was carried to assess the effects of rotor modifications in the alternator shaft bore. This paper provides a more detailed analysis of a complicated rotor train than is often performed for most rotors. Critical speeds, stability and unbalance response were evaluated to determine if lateral critical speeds might exist in the operating speed range in the existing or modified rotor train and if unbalance levels were within acceptable ranges. Critical speeds and rotor damping values determined for the rotor system with the existing and modified rotor. The first critical speed at 1069 rpm is an alternator mode below the operating speed range. The second critical speed is also an alternator mode but, at 1528 rpm, is in the rundown operating speed range. The third critical speed is a flywheel mode at 1538 rpm, also in the rundown operating speed range but well damped. The predicted highest rotor amplitude unbalance response level is at 1633 rpm, again in the operating speed range. Direct comparisons were made with measured bearing temperature values, with good agreement between calculations and measurements. Stress levels in the rotor were evaluated and found to be well below yield stress levels for the material for both original and modified rotors. Comparisons we carried out between standard vibration specifications and measured vibration levels which indicated that the third critical speed amplification factors were much higher than API standards indicate they should have been. Corrective actions to reduce unbalance were taken for the modified rotor.

Global civil aerospace will flourish in the long term

2016 ◽  
Keyword(s):  
Supply Chain ◽  
Aerospace Industry ◽  
Global Supply Chain ◽  
Commercial Aircraft ◽  
Content Type ◽  
Aircraft Systems ◽  
Global Growth

Subject Outlook for the civil aerospace industry. Significance Following the visit of President Hassan Rouhani to Europe, Iran is set to buy more than 100 airliners from Airbus over the next five years. The return of post-sanctions Iran as a buyer of commercial aircraft to re-equip its fleet gives both Airbus and Boeing hopes of a renewed surge in orders to fill any slowdown in the civil aerospace market caused by weak global growth. Impacts Iran may order up to 500 aircraft in 2016-21, worth 50 billion dollars overall. Cheap oil will lead some airlines to delay acquiring more fuel-efficient aircraft, affecting the global supply chain. Aircraft-, systems- and enginemakers will look forward to strong revenues in coming years.

Richard Ernst Meyer 1919 - 2008

2010 ◽  
Vol 21 (1) ◽  
pp. 75 ◽  
Author(s):  
R. J. Stalker ◽  
E. Nicole Meyer
Keyword(s):  
Fluid Motion ◽  
Wave Theory ◽  
Federal Institute ◽  
The Usa ◽  
Institute Of Technology ◽  
The University ◽  
University Of Manchester ◽  
Aircraft Production ◽  
Supersonic Aerodynamics ◽  
Mathematical Physicist

Richard E. Meyer was a mathematical physicist who specialized in the physics of fluid motion. His research career began with his doctorate at the Swiss Federal Institute of Technology, followed by a brief period of employment with the English Ministry of Aircraft Production. He then went to the University of Manchester, where he made his first major research contributions. In 1953 he left Manchester for the University of Sydney. By this time he was established as a theoretical supersonic aerodynamicist and he continued with this work as well as assuming the responsibilities of a research group leader. In 1957 he went to the USA and remained there for the rest of his life, essentially abandoning supersonic aerodynamics in favour of water-wave theory. His work was marked by an ability to analyse the approach to limiting conditions, or singularities, in models of physical processes. From the 1970s, he focused increasingly on developing the mathematical aspects of his work.

scholarly journals Wave-Generated Current: A Second-Order Formulation

2020 ◽  
Vol 8 (6) ◽  
pp. 418
Author(s):  
Anne Katrine Bratland
Keyword(s):  
Wave Theory ◽  
Second Order ◽  
Stokes Drift ◽  
Wave Number ◽  
Stokes Wave ◽  
Wave Loads ◽  
Third Order ◽  
The Third ◽  
Computational Fluid Dynamics Cfd ◽  
The Mean

In Stokes’ wave theory, wave numbers are corrected in the third order solution. A change in wave number is also associated with a change in current velocity. Here, it will be argued that the current is the reason for the wave number correction, and that wave-generated current at the mean free surface in infinite depth equals half the Stokes drift. To demonstrate the validity of this second-order formulation, comparisons to computational fluid dynamics (CFD) results are shown; to indicate its effect on wave loads on structures, model tests and analyses are compared.

Strategic destruction of the Western commercial aircraft sector: Implications of systems integration and international risk-sharing business models

2007 ◽  
Vol 111 (1119) ◽  
pp. 327-334 ◽  
Author(s):  
D. Pritchard ◽  
A. MacPherson
Keyword(s):  
Risk Sharing ◽  
Business Models ◽  
Systems Integration ◽  
Skilled Workers ◽  
Commercial Aircraft ◽  
International Risk Sharing ◽  
The Us ◽  
The Uk ◽  
Aircraft Production

Abstract This paper offers a critical perspective on the changing organisational structure of the Western commercial aircraft industry. The role of systems integration based on risk-sharing partnerships for new aircraft programmes is explored. We find that build-to-print subcontracting relationships are being replaced by internationally devolved design and engineering tasks for airframe development, signaling a profound change in the geography of commercial aircraft production. While sensible from a financial standpoint, the international outsourcing of design-intensive production entails substantial amounts of technology transfer–including the delivery of proprietary knowledge to risk-sharing partners. For several of the advanced market economies, including Canada, France, Germany, the UK, and the US, the long-range strategic downside is that foreign risk-sharing partners could eventually become competitors. Systems integration on a risk-sharing basis also implies home-country joblosses among skilled workers with expertise in design, engineering, and R&D.

scholarly journals Integrated Image-Based Computational Fluid Dynamics Modeling Software as an Instructional Tool

2020 ◽  
Vol 142 (11) ◽  
Author(s):  
Kimberly A. Stevens Boster ◽  
Melody Dong ◽  
Jessica M. Oakes ◽  
Chiara Bellini ◽  
Vitaliy L. Rayz ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Computational Modeling ◽  
Engineering Students ◽  
Integrated Modeling ◽  
Instructional Tool ◽  
Dynamics Modeling ◽  
Study Abroad Programs ◽  
Modeling Software ◽  
Computational Fluid Dynamics Cfd

Abstract Computational modeling of cardiovascular flows is becoming increasingly important in a range of biomedical applications, and understanding the fundamentals of computational modeling is important for engineering students. In addition to their purpose as research tools, integrated image-based computational fluid dynamics (CFD) platforms can be used to teach the fundamental principles involved in computational modeling and generate interest in studying cardiovascular disease. We report the results of a study performed at five institutions designed to investigate the effectiveness of an integrated modeling platform as an instructional tool and describe “best practices” for using an integrated modeling platform in the classroom. Use of an integrated modeling platform as an instructional tool in nontraditional educational settings (workshops, study abroad programs, in outreach) is also discussed. Results of the study show statistically significant improvements in understanding after using the integrated modeling platform, suggesting such platforms can be effective tools for teaching fundamental cardiovascular computational modeling principles.

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