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Energy efficiency has been gaining relevance over the years. For this reason, large companies try to promote research and development through healthy competition. Shell Eco-Marathon promotes the development of energy efficiency through a closed-circuit car race, in which university students design and build vehicles from scratch. In order to generate knowledge in this area, the students at the Autonomous University of Bucaramanga designed a vehicle in accordance with the current regulations of the competition for the year 2022. For this, they designed a tubular chassis in SolidWorks that was subjected to different mechanical resistance tests in COMSOL. Subsequently, the steering system was designed in accordance with Ackerman's geometry and, finally, the vehicle body was developed in SolidWorks and an aerodynamic study was carried out on it using Ansys Fluent. [ABSTRACT FROM AUTHOR]

The present research study examines the aerodynamic behavior of a Suzuki Forsa vehicle with a racing airfoil. The ANSYS Fluent software and the RANS K-ϵ turbulence model are used to perform a numerical simulation. A coarse and a refined mesh are used to design the airfoil. The data is validated with the refined mesh by using a normalized wall distance (y+=5) and an inflation rate of 1.20. This configuration is used to perform computational fluid dynamics simulations with different angles of attack (5°, 10°, 15°, and 20°). The simulation time was 10 hours for the proposed angles of attack. The results show that the 20° angle of attack provides an adequate negative sustentation force (aerodynamic force) to improve tire grip with tread surface and achieve the most efficient aerodynamic. It is concluded that the 20° angle of attack configuration provides the most downforce and the most efficient aerodynamic configuration for Suzuki Forsa vehicles. [ABSTRACT FROM AUTHOR]

Introduction: Wind energy has grown rapidly in the last 20 years and sites to install full-scale wind farms are starting to run out. Small-scale wind turbines represent a feasible alternative, particularly in forested areas of low wind potential and high turbulence. Objective: to present a review of the aerodynamic profiles for small-scale wind turbines, to determine their possible application in wooded areas. Materials and methods: a review of smallscale horizontal axis wind turbines is carried out using the Web of Science and Scopus databases mainly on the journals: Energy, Wind Engineering and Industrial Aerodynamics, Renewable and Sustainable Energy Reviews, and Renewable Energy. A classification of three large groups is defined for the aerodynamic profiles: very frequent use, medium frequency use and low frequency use. Results: the profiles of very frequent use are the SG6043, S809 and NACA0012, the first of them is the one having the best aerodynamic performance. Despite this, other profiles such as the SH3055 are widely used in the small-scale wind turbine field. Conclusions: a suitable profile for a smallscale wind turbine for forested areas should be designed for stall regulation and have low sensitivity against changes in surface roughness. The profile with the greatest potential, according to the literature for this application, is the SG6043, being 110% y 85% more efficient than NACA002 and S809, respectively, for a Re of 2 x 105; however, more research is required on issues such as aerodynamic performance of the profiles at high levels of turbulence. [ABSTRACT FROM AUTHOR]

Copyright of DYNA - Ingeniería e Industria is the property of Publicaciones Dyna SL and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of DYNA - Ingeniería e Industria is the property of Publicaciones Dyna SL and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The aim of this work is to evaluate the aerodynamic characteristics of lift and drag of the Unmanned Airplane for Ecological Conservation by using wind tunnel testing and using a linear computational fluid dynamic method combined with an analytical-empirical numerical method to determine skin-friction. Two versions of the airplane were evaluated experimentally and numerically. Experimental tests were carried out in an unpressurised, close-throat, and close circuit wind tunnel Rollab SWT-009. Each model was built on a 1:21.6125 scale. A code capable of estimating the skin-friction drag of the surface of an airplane was developed which uses output data from the high-order panel code PAN AIR as input. The code calculates the local Reynolds number in the control point of each panel, and then the skin-friction coefficient of each panel. The total skin-friction contribution of each panel results in the skin-friction drag coefficient. The experimental results at different Reynolds numbers show similar trends to those observed in previous studies with the same airplane. The values of drag coefficient agree with the experimental results at fight Reynolds number. [ABSTRACT FROM AUTHOR]

Copyright of DYNA - Ingeniería e Industria is the property of Publicaciones Dyna SL and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista Avances: Investigación en Ingeniería is the property of Universidad Libre, Facultad de Ingenieria and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In industrial design, aeronautical technologies are not usually addressed, nor are they incorporated as teaching exercises in laboratories. The economic and technological variables make it difficult to carry out the academic intervention of industrial design, in the aeronautical design due to the lack of resources and specialized facilities. However, the emergence of parametric computer programs, aimed at users with little experience in calculation, the access to rapid prototyping technologies and the availability of low-cost high-tech materials, have enabled the design and construction of a primary ultra light glider, as an experimental academic experience of the School of Design of the University of Chile. The competition of amateur gliders called Flugtag, sponsored by a recognized brand of energetic drinks, arose as the perfect opportunity for the development of a flying vehicle and also as a challenge to open a potential development area at the school of design. This work should be understood as a first approach to the design of primary aircraft, assisted with software, which is based on the preliminary experience that the academic group has developed in the design and construction of land vehicles. The process generated many more questions rather than certainties, which in turn, will allow to address a second project with more expertise and better track of all stages of construction and testing. [ABSTRACT FROM AUTHOR]

Copyright of Revista Iberoamericana de Ingeniería Mecánica is the property of Editorial UNED and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Iteckne is the property of Universidad Santo Tomas, Division de Ingenierias and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of DYNA - Ingeniería e Industria is the property of Publicaciones Dyna SL and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The present article, briefly, describes the theoretical design procedure of Wells turbines, typically utilized in Pneumatic Wave Energy Conversion Systems (PWECS). The principle behind the PWECS consists of extracting the pneumatic energy caused by an oscillating water column by the entrance of water waves in enclosed spaces. The paper establishes the design and experimental testing of a small permanent magnet generator suited for the wells turbine under development. The adequate matching between the Wells turbine and the generator has been conceived as a portable 50w d.c. electricity generation device; to be used, either, to powering telecommunications systems in military operations or to power navigation aids in rivers or at sea [ABSTRACT FROM AUTHOR]

El presente artículo pretende ilustrar sobre las actuales ventajas del uso del dirigible en actividades militares, con especial énfasis en la vigilancia, para su uso potencial en Colombia. Esta alternativa de aeronave debe ser tenida en cuenta para una toma de decisiones acertada en la actual situación de conflicto que vive el país. [ABSTRACT FROM AUTHOR]