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Relevant bibliographies by topics / Aerodynamic Drag

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Academic literature on the topic 'Aerodynamic Drag'

Author: Grafiati

Published: 4 June 2021

Last updated: 14 June 2025

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Journal articles on the topic "Aerodynamic Drag"

1

Kothari, Priyank. "Reduction of Aerodynamic Drag of Heavy Vehicles using CFD." International Journal for Research in Applied Science and Engineering Technology 9, no. 8 (2021): 2670–78. http://dx.doi.org/10.22214/ijraset.2021.37853.

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Abstract: Aerodynamic drag is the force that opposes an object’s motion. When a vehicle no matter the size, is designed to allow air to move fluidly over its body, aerodynamic drag will have less of an impact on its performance and fuel economy. Heavy trucks burn a significant amount of fuel as to overcome the air resistance. More than 50% of an 18-wheeler’s fuel is spent reducing aerodynamic drag on the highways. Keywords: Aerodynamics, Heavy vehicles, ANSYS, Aerodynamic Drag, Fuel efficiency.

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Hong, Sungchan, Takeshi Asai, and Byung Mook Weon. "Surface Patterns for Drag Modification in Volleyballs." Applied Sciences 9, no. 19 (2019): 4007. http://dx.doi.org/10.3390/app9194007.

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Surface patterns on objects are important in aerodynamics. We show how surface patterns on volleyballs modify their aerodynamic performances. Conventional volleyballs with six panels show different aerodynamic characteristics along transverse and diagonal directions. Interestingly, isotropic surface patterning with hexagons or dimples enables us to achieve isotropic aerodynamics. This result gives insight into surface-mediated flight controls of projectiles through resisting fluid media.

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Zhou, Haichao, Qingyun Chen, Runzhi Qin, Lingxin Zhang, and Huiyun Li. "Investigation of wheelhouse shapes on the aerodynamic characteristics of a generic car model." Advances in Mechanical Engineering 13, no. 12 (2021): 168781402110668. http://dx.doi.org/10.1177/16878140211066842.

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As vehicle speed increases, the aerodynamic drag reduction becomes increasingly significant. The aim of this paper is to find out the effects of the wheelhouse shapes on the aerodynamics of an Ahmed body with a 35 slant angle. In this paper, based on the detached-eddy simulation method, the effects of the three classic different wheelhouse on the aerodynamic performance and near wake of the Ahmed body are presented. The mesh resolution and methodology are validated against the published test results. The results show that the front wheelhouse has a significant impact on the aerodynamic performance of the Ahmed body, leading to different aerodynamic drag forces and flow fields. Enlarging the wheelhouse cavity volume could result in a gradual increase in aerodynamic drag coefficients, the ratio of the wheelhouse cavity volume increased by 2.9% and 9.8%, the drag coefficients increased by 2.5% and 4.5% respectively. The increase in aerodynamic drag was primarily caused by flow separation in the large cavity volume wheelhouse.

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Li, Yan Long, Chen Ming Zhang, and Zhi Gang Yang. "Electric Car Styling Design and Aerodynamic Drag Optimization." Applied Mechanics and Materials 437 (October 2013): 463–70. http://dx.doi.org/10.4028/www.scientific.net/amm.437.463.

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The paper takes a research on low-drag electric cars, and set a technical route that design with ideal aerodynamic shapes and then developed into car-like shape. At last, both design refinement and aerodynamics optimization are given, finally comes out a successful concept electric car design with a nice aerodynamic of Cd=0.19.

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Quan, Vu Hai. "RESEARCH AND OPTIMIZATION OF SPORT UTILITY VEHICLE AERODYNAMIC DESIGN." Applied Engineering Letters : Journal of Engineering and Applied Sciences 9, no. 2 (2024): 105–15. http://dx.doi.org/10.46793/aeletters.2024.9.2.5.

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Drag and lift are two important parameters to evaluate a vehicle’s aerodynamic performance. Aerodynamic resistance (drag force Fd) prevents the movement of the vehicle and has a value proportional to the square of the velocity. That is, when the speed increases twice, the aerodynamic drag will increase fourfold. This article presents a plan to design a sport utility vehicle model with improved aerodynamics by using Ansys Fluent software to analyze pressure distribution areas that affect aerodynamics and the body. Based on the results obtained, the areas of stress and maximum pressure concentration have been identified. From this, a plan to improve the vehicle’s exterior design has been proposed. After many iterations of the design and model optimization process, the aerodynamic drag coefficient CD was reduced by 3.06% compared to the original model. The revised design option is equipped with an airflow diffuser under the vehicle; the lifting resistance coefficient has been reduced from 0.0902 to 0.038, equivalent to 58.2%. The new proposed design of the model has reduced the vehicle’s frontal drag by 2.04%. The research results have determined the aerodynamic coefficients CD and CL of the model car. Based on the results received, it is possible to compare them with the manufacturer’s announced parameters and propose new design options that still ensure aesthetics.

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Bhagya Lakshmi Nageswari, M., and Dr U. S. Jyothi. "Aerodynamic analysis of railway wagon on drag coefficient." E3S Web of Conferences 184 (2020): 01058. http://dx.doi.org/10.1051/e3sconf/202018401058.

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Aerodynamics play a major role in transport. When speed increases aerodynamic factors come into existence. By altering the design in an aerodynamic way, it can lead to better efficiency. This paper presents the effect of aerodynamic parameters on the wagon. The analysis was carried out on the existing and modified geometries using ANSYS Fluent 18.1softwareconsidered in the static ground conditions with the wind flowing at zero yaw angles. It was found that the coefficient of drag (Cd) is reduced by 17.7% for the modified wagon with the realistic wagon on an average.

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Zhang, Yao Ping. "Explicit Formula for Estimating Aerodynamic Drag on Trains Running in Evacuated Tube Transportation." Applied Mechanics and Materials 307 (February 2013): 156–60. http://dx.doi.org/10.4028/www.scientific.net/amm.307.156.

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Because of reducing aerodynamic drag, the maglev train could run at a high-speed in the partial vacuum tube. Scientists of some conutries such as U.S., Swiss and China, have started the research work on high-speed tube trains. In this situation, evacuated tube transportation aerodynamics becomes an important theory research aspect, in which the main study content is how to calculate aerodynamic drag. Based on the explicit formula for estimating aerodynamic drag on moving body in an infinite boundary surroundings put up by Isaac Newton, the evacuated tube surroundings is analyzed and the explicit formula with blockage ratio as an independent variable for estimating aerodynamic drag acted on trains running in the evacuated tube which is a finite space is deduced. With the calculation case, compared with the results came out from the explicit formula got in this paper and the results got by Fluent software, it was found that those results are closed. Thus, the explicit formula created in this paper for conveniently estimating aerodynamic drag based on trains running in evacuated tube transportation is credible.

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Musa, Mohamad Nor, Samion Syahrullail, and Fairuz Zainal Abidin. "Aerodynamic Analysis on Proton Preve by Experimental." Applied Mechanics and Materials 773-774 (July 2015): 575–79. http://dx.doi.org/10.4028/www.scientific.net/amm.773-774.575.

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The purpose of this study is to determine the coefficient drag, CD of the Proton PREVẾ by experimental method using Low Speed Wind Tunnel. All the relevant data are collected through the literature reviews from books and journals. First, the basic thing in aerodynamic is studied. There are two things are concern when studies aerodynamics. They were air flow and vehicle shape which we regard as aerodynamics factor that determine aerodynamic of the vehicle. Fundamental of air flow and vehicle shape is reviewed includes the relationship between air speed with pressure, boundary layer, Reynolds number, drag, lift drag and shape optimization. Wind tunnel is also studied before the experiment. Five selected speed were been tasted during the experiment to determine the CD value.

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Carruthers, A. C., and A. Filippone. "Aerodynamic Drag of Parafoils." Journal of Aircraft 42, no. 4 (2005): 1081–83. http://dx.doi.org/10.2514/1.12255.

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Metar, Manas. "Aerodynamic Analysis of Spoiler at Varying Speeds and Angles." International Journal for Research in Applied Science and Engineering Technology 9, no. 11 (2021): 526–35. http://dx.doi.org/10.22214/ijraset.2021.38843.

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Abstract: Spoilers have been there in practice since years for the purpose of improving aerodynamics of a car. The pressure drag created at the end of the vehicle, referred to as wake region affects handling of the vehicle. This could be hazardous for the cars at high speeds. By adding a spoiler to the rear of the car reduces that pressure drag and the enhanced downforce helps in better traction. The paper presents aerodynamic analysis of a spoiler through Computational Fluid Dynamics analysis. The spoiler is designed using Onshape software and analyzed through SIMSCALE software. The simulation is carried out by changing angles of attack and velocities. The simulation results of downforce and drag are compared on the basis of analytical method. Keywords: Designing a spoiler, Design and analysis of spoiler, Aerodynamics of spoiler, Aerodynamic analysis of spoiler, Computational fluid dynamics, CFD analysis, CFD analysis of spoiler, Spoiler at variable angles, Types of spoilers, Analytical aerodynamic analysis.

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Dissertations / Theses on the topic "Aerodynamic Drag"

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Kinghorn, Philip Donovan. "Aerodynamic Drag On Intermodal Rail Cars." BYU ScholarsArchive, 2017. https://scholarsarchive.byu.edu/etd/6407.

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The freight rail industry is essential to the US infrastructure and there is significant motivation to improve its efficiency. The aerodynamic drag associated with transport of commodities by rail is becoming increasingly important as the cost of diesel fuel increases. For intermodal railcars a significant amount of aerodynamic drag is a result of the large distance between containers that often occurs and the resulting pressure drag resulting from the separated flow that results due to their non-streamlined shape. This thesis reports on research that has been done to characterize the aerodynamic drag on intermodal train builds and allow their builds to be optimized for fuel efficiency. Data was obtained through wind tunnel testing of G-scale (1/29) models. Drag on these models was measured using a system of isolated load cell balances and the wind tunnel speed was varied from 20 to 100 mph. Several common intermodal scenarios were explored and the aerodynamic drag for each was characterized. These scenarios were the partial loading of containers on rail cars, the influence of the gap between containers, the use of a streamlined container near the front of the train, and the inclusion of semi-trailers on railcars. For each case multiple build configurations were tested and the drag results were compared to determine the optimal build for each scenario.

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Brockie, N. J. W. "The aerodynamic drag of high speed trains." Thesis, University of Nottingham, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.234147.

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Oggiano, Luca. "Drag reduction and aerodynamic performances in Olympic sports." Doctoral thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for energi- og prosessteknikk, 2010. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-12110.

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In sports where high speed is involved, races are often won by milliseconds. Any advantage can then be important in order to reach the success. The drag acting on the athletes is often the highest force that the athletes have to fight against and, even a small reduction of drag, can create an advantage in terms of performances. However, in sports like ski jumping, the aerodynamic involved gets to be more complex, involving drag and lift force. Wind tunnel measurements have been carried out in the last century in order to understand the physics behind phenomena linked to sport activities (for example ball aerodynamics) or in order to optimize postures and materials. With the performances enhancement as final goal the aerodynamics behind a number of sports have been previously studied. Posture optimization, low drag bycicles, skin suits or even the recent and famous Speedo swimming suits are only some of the achievements of the research carried out. In the present thesis, a wide approach to the topic with particular focus on textile aerodynamics has been used. The thesis has then be divided into two main areas: A research Area 1 named Textiles and their effect on the aerodynamics of athletes and referred RA1 where the influence of textiles and clothing equipement on the drag acting against the athletes have been studied and a Research Area 2 named Performances and Prototyping where more practical examples of how aerodynamics can directy affect athletes performances are given and exposed. In RA1 the topography of textiles have been studied and the surface structure properties has been linked to the aerodynamic properties with particular regards to drag reduction and turbulence tripping. In order to simplify the case the athlete’s body has been simplified as a serie of cylindrical shapes and tests have been carried out mostly on cylinders. Effect of yaw angle, different speed, different diameter, different roughness, different material and distance between body parts have been analyzed. At the same time, test on existing suits have been carried out and a mathematical model in order to estimate performances in speed skating has been made. In RA2 different side projects have been carried out and the results can be summarized as follow: Effects of body weight in ski jumping has been analyzed in order to figure out if the new rules imposed by the FIS (International Ski Federation) were effective in order to reduce the increasing problem of anorexia amongst ski jumpers. Wind tunnel measurements were carried out in order to find the aerodynamic forces acting on a ski jumper in his flight path. The experimental data were then implemented into a mathematical model which is able to simulate the in-run and the flight path. In cycling, the attention was focused on the posture assumed by the cyclists with the goal of reducing the drag while keeping a good biomechanical efficiency. The rules imposed by UCI (International Cycling Union) set the boundaries. However, a impressively good result has been obtained focusing the attention on each athlete and finding a subjective optimum posture for each of the athletes tested. A low drag ski boot have been designed with a airfoiled shape which permitted to obtain an impressive drag reduction on the total drag acting on a downhill skier. Speed skating suits have been tested in order to quantify the influence of different model suits on skating performances. The suit used by torwegian Olympic team of ski-cross has been designed using the knowledge acquired and presented in RA1. An impressive drag reduction has been obtained and it helped two norwegian athletes to win a silver and a bronze medal at theWinter Olympic Games in Vancouver 2010. As previously mentioned, the research areas are: Research Area 1 - Textiles and their effect on the aerodynamics of athletes Research Area 2 - Performances and prototyping The main contributions are: P1: Reducing the Athlete’s aerodynamics P2: Experimental analysis on parameters affecting drag force on athletes P3: Aerodynamic and comfort properties of single jersey textiles for high speed sports P4: Aerodynamic behavior of single sport jersey fabrics with different roughness and cover factors P5: Effect of different skin suits on speed skating performances P6: Aerodynamic optimization and energy saving of cycling postures for international elite level cyclists P7: Effects of body weight on Ski Jumping performances under the new FIS rules P8: Airfolied design for alpine skiers boots P9: Aerodynamic and Comfort Characteristics of A Double Layer Knitted Fabric Assembly for High Speed Winter Sports P10: A Low Drag Suit For Ski-Cross Competitions

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Bergman, David. "Modelling & implementation of Aerodynamic Zero-lift Drag into ADAPDT." Thesis, Mälardalen University, School of Innovation, Design and Engineering, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-7459.

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<p>The objective of this thesis work was to construct and implement an algorithm into the programADAPDT to calculate the zero-lift drag profile for defined aircraft geometries. ADAPDT, shortfor AeroDynamic Analysis and Preliminary Design Tool, is a program that calculates forces andmoments about a flat plate geometry based on potential flow theory. Zero-lift drag will becalculated by means of different hand-book methods found suitable for the objective andapplicable to the geometry definition that ADAPDT utilizes.</p><p>Drag has two main sources of origin: friction and pressure distribution, all drag acting on theaircraft can be traced back to one of these two physical phenomena. In aviation drag is dividedinto induced drag that depends on the lift produced and zero-lift drag that depends on the geometry of the aircraft.</p><p>How reliable and accurate the zero-lift drag computations are depends on the geometry data thatcan be extracted and used. ADAPDT‟s geometry definition is limited to flat plate geometrieshowever although simple it has the potential to provide a huge amount of data and also delivergood results for the intended use. The flat plate representation of the geometry proved to beleast sufficient for the body while wing elements could be described with much more accuracy.</p><p>Different empirical hand-book methods were used to create the zero-lift drag algorithm. Whenchoosing equations and formulas, great care had to be taken as to what input was required sothat ADAPDT could provide the corresponding output. At the same time the equations shouldnot be so basic that level of accuracy would be compromised beyond what should be expectedfrom the intended use.</p><p>Finally, four well known aircraft configurations, with available zero-lift drag data, weremodeled with ADAPDT‟s flat plate geometry in order to validate, verify and evaluate the zeroliftdrag algorithm‟s magnitude of reliability. The results for conventional aircraft geometriesprovided a relative error within 0-15 % of the reference data given in the speed range of zero toMach 1.2. While for an aircraft with more complicated body geometry the error could go up to40 % in the same speed regime. But even though the limited geometry is grounds foruncertainties the final product provides ADAPDT with very good zero-lift drag estimationcapability earlier not available. A capability that overtime as ADAPDT continues to evolve hasthe potential to further develop in terms of improved accuracy.</p><br><p>Målet med detta examensarbete var att skapa och implementera en algoritm som införmöjligheten att beräkna nollmotstånd för givna flygplansgeometrier i programmet ADAPDT.ADAPDT, kort för AeroDynamic Analysis and Preliminary Design Tool, är ett program som,baserat på potential strömnings teori, beräknar krafter och moment på en geometri uppbyggd avplana plattor. Nollmotståndet kommer att baseras en kombination av handboksmetoder somfunnits lämpliga och applicerbara på geometridefinitionen given i ADAPDT.</p><p>Motstånd har sitt ursprung i två fysikaliska fenomen: friktion och tryckfördelning, ur vilka alltmotstånd som agerar på ett flygplan härrör. Inom flyget delar man in motståndet ilyftkraftsberoende inducerat motstånd samt geometriberoende nollmotstånd.</p><p>Hur pålitliga och noggranna motståndsberäkningarna kan förväntas vara beror på mängdengeometriska data som finns att tillgå. ADAPDT:s geometridefinition är begränsad till planaplattor men trots detta finns potential att leverera stora mängder data och resultat med rimlignoggrannhet. Plan plattgeometrin visade sig, för kroppsgeometrin, väldigt begränsad ochotillräcklig medan ving element kunde beskrivas med större noggrannhet.</p><p>En rad olika empiriska handboksmetoder användes för att skapa nollmotståndsalgoritmen. Vidvalet av formler och ekvationer var det viktigt att välja sådana som ADAPDT kunde försetillräckligt med data till. Samtidigt fick formlerna inte vara alltför simpla så att måttet avnoggrannhet i resultaten vart alltför låg mot för vad som, för ändamålet, är förväntat.</p><p>Slutligen valdes fyra kända flygplan, med nollmotståndsdata tillgängligt, att modeleras medADAPDT:s plan plattgeometri för att validera, verifiera och utvärdera algoritmens mått avtillförlitlighet. Resultaten för mer konventionella flygplanskonfigurationer visade på ett relativtfel mellan 0-15 % mot de givna referensflygplanens nollmotståndsdata inom hastigheterna 0 tillMach 1,2. För mer komplicerade konfigurationer steg det relativa felet omedelbart upp mot 40% inom samma hastighetsregim. Men även om den begränsade geometridefinitionen iADAPDT är grunden för mycket osäkerheter förser den slutliga produkten ändå programmetmed en väldigt god möjlighet till skattning av nollmotståndet som inte tidigare fanns. Enmöjlighet som över tid, allteftersom ADAPDT forstätter att utvecklas, har all potential till attförbättras med avseende på noggrannhet och tillförlitlighet.</p>

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Golovidov, Oleg. "Variable-Complexity Approximations for Aerodynamic Parameters in Hsct Optimization." Thesis, Virginia Tech, 1997. http://hdl.handle.net/10919/36789.

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A procedure for generating and using polynomial approximations to the range or to the cruise drag components in terms of 29 design variables for the High Speed Civil Transport (HSCT) configuration and performance design is presented. Response surface model methodology is used to fit quadratic polynomials to data gathered from a series of numerical analyses of different HSCT designs. Several techniques are employed to minimize the number of required analyses and to maintain accuracy. Approximate analysis techniques are used to find regions of the design space where reasonable HSCT designs could occur and response surface models are built using higher fidelity analysis results of the designs in this "reasonable" region. Regression analysis and analysis of variance are then used to reduce the number of polynomial terms in the response surface model functions. Optimizations of the HSCT are then carried out both with and without the response surface models, and the effect of the use of the response surface models is discussed. Results of the work showed that considerable reduction of the amount of numerical noise in optimization is achieved with response surface models and the convergence rate was slightly improved. Careful attention was required to keep the accuracy of the models at an acceptable level. NOTE: (07/2012) An updated copy of this ETD was added after there were patron reports of problems with the file.<br>Master of Science

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Poláš, Maroš. "Experimentální identifikace aerodynamických vlastností vozidla jízdní zkouškou." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-319863.

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This thesis deals with road loads, coastdown tests and evaluation of measured data. Thesis consists of two main parts: theoretical and computational. The first part describes road loads with focus on aerodynamic drag and lift force. In the second part, a software tool for processing the measurement per ISO 10521-1 is designed and lift force measured with running resistance method is calculated.

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Bangalore, Gangadharacharya Koushik. "Vortex Shedding And Aerodynamic Drag On Truncated Trailing Edge Airfoil." Thesis, KTH, Flygdynamik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-185029.

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The thesis work content is to evaluate the use of more advanced turbulence models available in the ANSYS CFX software for aerodynamic calculations. In particular for flows over airfoils with thick trailing edges, the turbulence modeling is challenging to traditional methods, as both thin boundary layers as well as an unsteady wake needs to be well represented. This is done by using the standard SST and then performing unsteady computations using the more advanced unsteady SAS-SST model to get the relevant CFD results. By comparing to tests performed at GKN and results from literature the improvement could be assessed in terms of modeling quality and computational cost. The results presented give a good contribution to how the modeling of unsteady wakes can be improved and used for design purposes.

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Angle, Gerald M. "Aerodynamic drag reduction of a racing motorcycle through vortex generation." Morgantown, W. Va. : [West Virginia University Libraries], 2002. http://etd.wvu.edu/templates/showETD.cfm?recnum=2643.

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Thesis (M.S.)--West Virginia University, 2002.<br>Title from document title page. Document formatted into pages; contains xvi, 137 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 87-89).

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Wacker, Thomas. "A preliminary study of configuration effects on the drag of a tractor-trailer combination." Thesis, University of British Columbia, 1985. http://hdl.handle.net/2429/25143.

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The effect of configuration changes and add-on devices on the drag reduction of a tractor-trailer is studied through wind tunnel tests using two 1/12-scale models. The configuration changes involve ground clearance, tractor-trailer gap, roof angle and back inclination while add-on devices include flow deflectors, skirts and gap seals. Moving surface boundary layer control as a means of drag reduction is also attempted. Both drag and pressure data are obtained to help identify local contributions. Results suggest that an optimum combination of configuration parameters can reduce drag up to 17% while the add-on devices resulted in a further decrease by a modest amount. The results with moving surface boundary layer control proved to be inconclusive.<br>Applied Science, Faculty of<br>Mechanical Engineering, Department of<br>Graduate

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Job, Štefan. "Experimentální měření aerodynamických silových účinků." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230273.

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This thesis deals with the effect of the aerodynamic forces on a vehicle. It contains the description of the test run of the vehicle, the proposal on how to process the measurements, the processing of the measurements themselves, and the final assessment of the results as to their accuracy and the possibility of repeating the experiment. Furthermore, this thesis contains the comparison of the effect of the individual aerodynamic features on the race car.

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Books on the topic "Aerodynamic Drag"

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Thiede, Peter, ed. Aerodynamic Drag Reduction Technologies. Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/978-3-540-45359-8.

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Saltzman, Edwin J. A reassessment of heavy-duty truck aerodynamic design features and priorities. National Aeronautics and Space Administration, Dryden Flight Research Center, 1999.

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R, Meyer Robert, and NASA Dryden Flight Research Center., eds. A reassessment of heavy-duty truck aerodynamic design features and priorities. National Aeronautics and Space Administration, Dryden Flight Research Center, 1999.

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R, Meyer Robert, and NASA Dryden Flight Research Center., eds. A reassessment of heavy-duty truck aerodynamic design features and priorities. National Aeronautics and Space Administration, Dryden Flight Research Center, 1999.

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D, Robertson David, Moyer Seth A, and Ames Research Center, eds. An integrated CFD/experimental analysis of aerodynamic forces and moments. National Aeronautics and Space Administration, Ames Research Center, 1989.

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Slooff, J. W. Aircraft drag prediction and reduction: computational drag analyses and minimization; mission impossible? AGARD, 1986.

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T, Carson George, and United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch., eds. Effects of empennage surface location on aerodynamic characteristics of a twin-engine afterbody model with nonaxisymmetric nozzles. National Aeronautics and Space Administration, Scientific and Technical Information Branch, 1985.

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United States. National Aeronautics and Space Administration., ed. On the use of external burning to reduce aerospace vehicle transonic drag. NASA, 1990.

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Trefny, Charles J. On the use of external burning to reduce aerospace vehicle transonic drag. NASA, 1990.

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Georgene, Laub, McCroskey W. J, United States. Army Aviation Systems Command., and Ames Research Center, eds. Aerodynamic characteristics of two-dimensional wing configurations at angles of attack near -90. National Aeronautics and Space Administration, Ames Research Center, 1987.

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Book chapters on the topic "Aerodynamic Drag"

1

Wegener, Peter P. "Aerodynamic Drag." In What Makes Airplanes Fly? Springer US, 1991. http://dx.doi.org/10.1007/978-1-4684-0403-6_7.

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Wegener, Peter P. "Aerodynamic Drag." In What Makes Airplanes Fly? Springer New York, 1997. http://dx.doi.org/10.1007/978-1-4612-2254-5_7.

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Lind, David A., and Scott P. Sanders. "Aerodynamic Drag." In The Physics of Skiing. Springer New York, 2004. http://dx.doi.org/10.1007/978-1-4757-4345-6_18.

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Mandell, Avi M. "Gas Drag (Aerodynamic, Tidal)." In Encyclopedia of Astrobiology. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-11274-4_622.

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Morino, Luigi. "Damping and Aerodynamic Drag." In Mathematics and Mechanics - The Interplay. Springer Berlin Heidelberg, 2021. http://dx.doi.org/10.1007/978-3-662-63207-9_14.

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Knörzer, Dietrich. "Perspectives for the Future of Aeronautics Research." In Aerodynamic Drag Reduction Technologies. Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/978-3-540-45359-8_1.

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Messing, Ralf, and Markus Kloker. "DNS Study of Suction through Arrays of Holes in a 3-D Boundary-Layer Flow." In Aerodynamic Drag Reduction Technologies. Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/978-3-540-45359-8_10.

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Humphreys, Bryan E., and Ernst J. Totland. "Saab 2000 In-Service Test of Porous Surfaces for HLFC." In Aerodynamic Drag Reduction Technologies. Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/978-3-540-45359-8_11.

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Young, T. M., and J. P. Fielding. "Flight Operational Assessment of Hybrid Laminar Flow Control (HLFC) Aircraft." In Aerodynamic Drag Reduction Technologies. Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/978-3-540-45359-8_12.

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Meyer, Pascal. "Application of HLF Technology to Civil Nacelle." In Aerodynamic Drag Reduction Technologies. Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/978-3-540-45359-8_13.

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Conference papers on the topic "Aerodynamic Drag"

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Wood, Richard. "Aerodynamic Drag and Drag Reduction." In 41st Aerospace Sciences Meeting and Exhibit. American Institute of Aeronautics and Astronautics, 2003. http://dx.doi.org/10.2514/6.2003-209.

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Sabo, Matej, and Martin Bugaj. "Aerodynamic profile drag." In Práce a štúdie. University of Žilina, 2021. http://dx.doi.org/10.26552/pas.z.2021.1.25.

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Higher awareness of aviation sustainability and environmental impact creates more research on profile drag reduction. The basic principles of aerodynamic profile drag are described and its role within the total drag. The boundary layer is defined using mathematical and physical principles of fluid dynamics. There are two types of movement inside the boundary layer: laminar and turbulent. In these, their impact on profile drag is analysed. The profile drag of a wing has two sources: form drag and friction drag. Applications with the most impact, throughout history, on both types of drag reductions were reviewed. Because most of the total drag comes from friction, researchers focus more on it compared to form drag. The significant way of reducing friction drag is postponing the transition of laminar flow into turbulent. The control of laminar flow became crucial for reducing friction drag. In the last two decades, European Union supported multiple projects concerning laminar flow control. These advancements in the field are starting to get implemented and tested on new aircraft by manufactures.

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Fulton, Alexander B., Genevieve M. Lipp, Jeffrey D. Reid, and Brian P. Mann. "Cycling Aerodynamics: The Effect of Rider Position on Aerodynamic Drag." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-63488.

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Competitive cyclists seek to maximize their efficiency by minimizing the influence of resistive forces. At the high speeds maintained during competition, aerodynamic drag is the primary resistive force. This paper investigates the influence of a cyclist’s body position using models of aerodynamic drag and elucidates the time benefit of various body positions. Mathematical models from prior work, which use cyclist mass and body position angles, have been used to determine the projected frontal area of a cyclist and the aerodynamic drag. Graphical representation of the non-linear relationship between aerodynamic drag and an increasing velocity are also provided. Finally, simulations are produced for a 40 km time trial course, and the results indicate a maximum performance increase of 20.71% due entirely to rider body position when exerting 400 W. We conclude aerodynamic efficiency is crucial in competitive cycling, and its significant correlation with rider body position should not be ignored.

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Levin, D., G. Daser, Z. Shpund, D. Levin, G. Daser, and Z. Shpund. "On the aerodynamic drag of ribbons." In 14th Aerodynamic Decelerator Systems Technology Conference. American Institute of Aeronautics and Astronautics, 1997. http://dx.doi.org/10.2514/6.1997-1525.

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Baeder, Dirk, Thomas Indinger, Nikolaus Adams, and Peter Unterlechner. "Aerodynamic Investigation of Vehicle Cooling-Drag." In SAE 2012 World Congress & Exhibition. SAE International, 2012. http://dx.doi.org/10.4271/2012-01-0170.

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Sirenko, Volodymyr, Roman Pavlovs’ky, and Upendra S. Rohatgi. "Methods of Reducing Vehicle Aerodynamic Drag." In ASME 2012 Fluids Engineering Division Summer Meeting collocated with the ASME 2012 Heat Transfer Summer Conference and the ASME 2012 10th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/fedsm2012-72491.

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A small scale model (length 1710 mm) of General Motor SUV was built and tested in the wind tunnel for expected wind conditions and road clearance. Two passive devices, rear screen which is plate behind the car and rear fairing where the end of the car is aerodynamically extended, were incorporated in the model and tested in the wind tunnel for different wind conditions. The conclusion is that rear screen could reduce drag up to 6.5% and rear fairing can reduce the drag by 26%. There were additional tests for front edging and rear vortex generators. The results for drag reduction were mixed. It should be noted that there are aesthetic and practical considerations that may allow only partial implementation of these or any drag reduction options.

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PURVIS, J. "Parachute drag and radial force." In 9th Aerodynamic Decelerator and Balloon Technology Conference. American Institute of Aeronautics and Astronautics, 1986. http://dx.doi.org/10.2514/6.1986-2461.

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Watts, Gaines. "Dynamic drag force during parachute inflation." In 13th Aerodynamic Decelerator Systems Technology Conference. American Institute of Aeronautics and Astronautics, 1995. http://dx.doi.org/10.2514/6.1995-1562.

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Kennedy, J., and C. Lowry. "Space Shuttle Orbiter Drag Parachute System." In 13th Aerodynamic Decelerator Systems Technology Conference. American Institute of Aeronautics and Astronautics, 1995. http://dx.doi.org/10.2514/6.1995-1595.

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Lowry, Charles H. "Space Shuttle Orbiter Drag Chute Summary." In AIAA Aerodynamic Decelerator Systems (ADS) Conference. American Institute of Aeronautics and Astronautics, 2013. http://dx.doi.org/10.2514/6.2013-1364.

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Reports on the topic "Aerodynamic Drag"

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Voskuilen, Tyler, Lindsay Crowl Erickson, and Robert C. Knaus. Aerodynamic Drag Scoping Work. Office of Scientific and Technical Information (OSTI), 2018. http://dx.doi.org/10.2172/1423524.

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Salari, K., and J. Ortega. DOE Project on Heavy Vehicle Aerodynamic Drag. Office of Scientific and Technical Information (OSTI), 2009. http://dx.doi.org/10.2172/1130041.

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McCallen, R., K. Salari, J. Ortega, et al. DOE Project on Heavy Vehicle Aerodynamic Drag. Office of Scientific and Technical Information (OSTI), 2007. http://dx.doi.org/10.2172/1036846.

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Vlachos, Pavlos P., Martin Johnson, Alessandro Toso, and James Carneal. Structural Waveguides for Aerodynamic Turbulent Drag Reduction. Defense Technical Information Center, 2007. http://dx.doi.org/10.21236/ada475939.

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Zheng, Wanzheng, and Jason Merret. Aerodynamic Survey of Novel eVTOL Configuration Using SU2. Illinois Center for Transportation, 2022. http://dx.doi.org/10.36501/0197-9191/22-014.

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This report summarizes computational fluid dynamics (CFD) results of electric vertical takeoff and landing (eVTOL) geometries using the SU2 Reynolds-averaged Navier-Stokes (RANS) solver. Geometries were generated based on the Smart Transportation Infrastructure Initiative (STII) Rappor 15th iteration with various rotor-installment solutions. It was found that although open rotors installed on an underwing pylon were superior to shrouded rotors installed in a canoe, the canoe configuration would provide more potential for improvement, and using a canoe door to cover the first rotor opening would reduce the drag experienced by the canoe case below that upon the rod case. Rotor doors were found to be most efficient in reducing drag of the canoe case: Average drag reduction with covering the first rotor and all rotors was 66 and 165 counts, respectively. Changing rotor distributions along the chordwise direction had minimal impact on drag reduction, and placing rotors along the spanwise direction was not advised due to the increase of the projected frontal area. Increasing canoe chord length did not have significant impact on drag reduction; and if rotor doors were implemented, increasing canoe size had negative impact on drag. Rounding rotor edges did not change the aerodynamic performance of the canoe case but promotes vertical air intake when running lifting fans. Drag received by the canoe parabolically correlated to rotor diameter, with 126 counts of drag if the rotor diameter was 0 and 377 counts if the rotor diameter was 2.95 ft. Fuselage and tail added an average 179 counts of drag, and thus the aforementioned differences were still significant in the scale of aerodynamic properties of the full configuration.

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Celik, I., S. Katragadda, and R. Nagarajan. Aerodynamic drag characterization and deposition studies of irregular particles. Office of Scientific and Technical Information (OSTI), 1990. http://dx.doi.org/10.2172/6929515.

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Fernandez, Ruben, Hernando Lugo, and Georfe Dulikravich. Aerodynamic Shape Multi-Objective Optimization for SAE Aero Design Competition Aircraft. Florida International University, 2021. http://dx.doi.org/10.25148/mmeurs.009778.

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The SAE Regular Class Aero Design Competition requires students to design a radio-controlled aircraft with limits to the aircraft power consumption, take-off distance, and wingspan, while maximizing the amount of payload it can carry. As a result, the aircraft should be designed subject to these simultaneous and contradicting objectives: 1) minimize the aerodynamic drag force, 2) minimize the aerodynamic pitching moment, and 3) maximize the aerodynamic lift force. In this study, we optimized the geometric design variables of a biplane configuration using 3D aerodynamic analysis using the ANSYS Fluent. Coefficients of lift, drag, and pitching moment were determined from the completed 3D CFD simulations. Extracted coefficients were used in modeFRONTIER multi-objective optimization software to find a set of non-dominated (Pareto-optimal or best trade-off) optimized 3D aircraft shapes from which the winner was selected based to the desired plane performance.

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McCallen, R., K. Salari, J. Ortega, et al. FY2003 Annual Report: DOE Project on Heavy Vehicle Aerodynamic Drag. Office of Scientific and Technical Information (OSTI), 2003. http://dx.doi.org/10.2172/15013850.

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Kale, S. R. Characterization of aerodynamic drag force on single particles: Final report. Office of Scientific and Technical Information (OSTI), 1987. http://dx.doi.org/10.2172/5514474.

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Davis, E. J., and R. Periasamy. Optical Properties and Aerodynamic Drag Characteristics of Blow-Off Particulates. Defense Technical Information Center, 1985. http://dx.doi.org/10.21236/ada170626.

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