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Tesis sobre el tema "Motor vehicles Drag (Aerodynamics)"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 1 de febrero de 2022

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1

Esterhuyse, JC. "Aerodynamic drag of a two-dimensional external compression inlet at supersonic speed." Thesis, Cape Technikon, 1997. http://hdl.handle.net/20.500.11838/1297.

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Thesis (DTech (Mechanical engineering))--Cape Technikon, 1997<br>This study forms the basis from which the aerodynamic drag of a practical supersonic inlet can be predicted. In air-breathing propulsion systems, as used in high performance flight vehicles, the fuel is carried onboard and the oxygen required for combustion is ingested from the ambient atmosphere. The main function of the inlet is to compress the air from supersonic to subsonic conditions with as little flow distortion as possible. When the velocity of the vehicle approaches or exceeds sonic velocity (M = 1,0) a number of con

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2

Esterhuyse, J. C. "Aerodynamic drag of a two-dimensional external compression inlet at supersonic speed /." [S.l. : s.n.], 1997. http://dk.cput.ac.za/cgi/viewcontent.cgi?article=1033&context=td_ctech.

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3

Orselli, Erdem. "Computation Of Drag Force On Single And Close-following Vehicles." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/2/12607619/index.pdf.

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In this study, application of computational fluid dynamics to ground vehicle aerodynamics was investigated. Two types of vehicle models namely, Ahmed Body and MIRA Notchback Body and their scaled models were used. A commercial software &quot<br>Fluent&quot<br>was used and the effects of implementing different turbulence models with wall functions were observed. As a result, an appropriate turbulence model was selected to use in the study. The drag forces, surface pressure distributions and wake formations were investigated in simulation of various test cases available in the literature. Th

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4

Luke, Mark Elden. "Predicting Drag Polars For Micro Air Vehicles." Diss., CLICK HERE for online access, 2003. http://contentdm.lib.byu.edu/ETD/image/etd297.pdf.

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5

Barker, Brian W. "Effect of Adaptive Tabs on Drag of a Square-Base Bluff Body." DigitalCommons@CalPoly, 2014. https://digitalcommons.calpoly.edu/theses/1295.

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This thesis involves the experimental wind tunnel testing of a 0.127m by 0.127m square-base bluff body to test the effectiveness of trailing edge tabulations to reduce drag in the Cal Poly 0.912m by 1.219 m low-speed wind tunnel. To accomplish this, the boundary layer was first measured on the trailing edge of the model for the three speeds at 10, 20, and 30 m/s, with Re = 8.3e4, 1.6e5 and 2.5e5 respectively, without the tabs. Three different tests were performed to determine the effectiveness of the tabs. These tests included base pressure measurements, total drag force measurements and hotwi

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6

Marchetti, Paul J. "Electric propulsion and controller design for drag-free spacecraft operation in low earth orbit." Link to electronic thesis, 2006. http://www.wpi.edu/Pubs/ETD/Available/etd-122006-144358/.

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7

Littlewood, Rob. "Novel methods of drag reduction for squareback road vehicles." Thesis, Loughborough University, 2013. https://dspace.lboro.ac.uk/2134/12534.

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Road vehicles are still largely a consumer product and as such the styling of a vehicle becomes a significant factor in how commercially successful a vehicle will become. The influence of styling combined with the numerous other factors to consider in a vehicle development programme means that the optimum aerodynamic package is not possible in real world applications. Aerodynamicists are continually looking for more discrete and innovative ways to reduce the drag of a vehicle. The current thesis adds to this work by investigating the influence of active flow control devices on the aerodynamic

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8

Kim, Yusik. "Wind turbine aerodynamics in freestream turbulence." Thesis, University of Southampton, 2013. https://eprints.soton.ac.uk/360372/.

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Topics in wind turbine aerodynamics are reviewed. These include the effect of freestrearn turbulence all the flows over wind turbine blades; dynamic stall phenomenon; and rotational augmentation. The advantages of numerical studies on these topics are highlighted and large-eddy simulation (LES) is selected to overcome the defects for other numerical approaches, e.g. Reynolds Average Navier-Stokes (RANS) , all such applications

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9

Castillo-Rivera, Salvador. "Advanced modelling of helicopter nonlinear dynamics and aerodynamics." Thesis, City University London, 2014. http://openaccess.city.ac.uk/13169/.

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The work presented here provides a comprehensive dynamic and aerodynamic helicopter model. The possible applications of this work are wide including, control systems applications, reference and trajectory tracking methods implementation amongst others. The model configuration corresponds to a Sikorsky helicopter; a main rotor in perpendicular combination with a tail rotor. Also, a particular model of unmanned aerial vehicle has been modelled as part of collaboration with the La Laguna University (Spain). The modelling tool is VehicleSim, a program that builds rigid body systems, solves the non

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10

Wells, Andrew K. "Slat aerodynamics and aeroacoustics with flow control." Thesis, University of Southampton, 2007. https://eprints.soton.ac.uk/49932/.

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This study primarily investigated the flow and aeroacoustics associated with the slat of a three-element aerofoil in approach conditions. The study assessed importance of several factors and examined their aerodynamic impacts. The factors investigated were aerofoil incidence, slat angle, slat cusp geometry, fixing transition and blowing in the slat cove. A combination of experimental and computational techniques investigated the factors selected. The experimental work employed PIV, pressure tap, a force balance, flush mounted microphones and an acoustic array. The computational work used DES a

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11

Angland, David. "Aerodynamics and aeroacoustics of flap side-edges." Thesis, University of Southampton, 2008. https://eprints.soton.ac.uk/66077/.

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An experimental and computational investigation was carried out to determine the aerodynamics and aeroacoustics of a flap side-edge. A porous side-edge treatment was applied to the flap side-edge in an attempt to reduce airframe noise. Measurements taken as part of the experimental study were forces, on-surface pressures, particle image velocimetry, hotwire anemometry and on-surface microphones. Oil flow was performed to visualise the on-surface flow. A detached eddy simulation was performed on a geometry that consisted of a main element and a half span flap to understand the flowfield. From t

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12

Henderson, Jason. "Investigation of cavity flow aerodynamics using computational fluid dynamics." Thesis, University of Glasgow, 2001. http://theses.gla.ac.uk/3483/.

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Open cavity flow is that of most interest to researchers. The flow is typical to that found to exist in the bomb bay of the F-111 and is characterised by intense acoustic levels. A review of the work of previous experimental researchers is included for comparison with the findings of the present thesis. The flow physics indicate that a series of vortices travel downstream in the cavity and are driven by vorticity generated at the upstream lip of the cavity. When strengthened the downstream moving vortex influences the mass addition and expulsion at the trailing edge initiating a pressure wave

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13

Jones, Marvin Alan. "Mechanisms in wing-in-ground effect aerodynamics." Thesis, University College London (University of London), 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.343624.

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An aircraft in low-level flight experiences a large increase in lift and a marked reduction in drag, compared with flight at altitude. This phenomenon is termed the 'wing-in-ground' effect. In these circumstances a region of high pressure is created beneath the aerofoil, and a pressure difference is set up between its upper and lower surfaces. A pressure difference is not permitted at the trailing edge and therefore a mechanism must exist, which allows the pressures above and below to adjust themselves to produce a continuous pressure field in the wake. It is the study of this mechanism and it

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14

Phillips, Catriona. "Computational study of rotorcraft aerodynamics in ground effect and brownout." Thesis, University of Glasgow, 2010. http://theses.gla.ac.uk/1783/.

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When helicopters operate close to the ground in desert conditions, the rotor wake can entrain large amounts of dust into the flow field surrounding the aircraft. This entrainment of dust can result in the potentially dangerous condition known as brownout where the pilot loses situational awareness. Understanding the physics that governs the entrainment of dust from the ground may eventually allow the condition of brownout to be avoided completely. To enable the formation of dust clouds around helicopters to be investigated, Brown's Vorticity Transport Model~(VTM) has been enhanced to include t

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15

Menzies, Ryan D. D. "Investigation of S-shaped intake aerodynamics using computational fluid dynamics." Thesis, University of Glasgow, 2002. http://theses.gla.ac.uk/1440/.

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Flows in the s-shaped intake (Royal Aircraft Establishment intake model 2129-M2129) have been simulated and analysed using Computational Fluid Dynamics (CFD). Various flows have been simulated from steady through-flow for validation and verification, steady flows at a variety of angles of pitch and yaw, and the unsteady flow of surge wave propagation following the application of surge signatures at the engine face. Reynolds Averaged Navier-Stokes (RANS) simulations have been considered using the SA, k- ω and SST turbulence models where possible. The freestream Mach number was fixed at 0.21 and

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16

Murad, Nurul Muiz. "Computational fluid dynamics (CFD) of vehicle aerodynamics and associated acoustics." Swinburne Research Bank, 2009. http://hdl.handle.net/1959.3/47824.

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Thesis (PhD) - Swinburne University of Technology, School of Engineering and Science, 2009.<br>A thesis submitted in accordance with the regulations for the degree of Doctor of Philosophy, School of Engineering and Science, Swinburne University of Technology, 2009. Typescript. Includes bibliographical references (p. 315-330)

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17

Zerihan, Jonathan. "An investigation into the aerodynamics of wings in ground effect." Thesis, University of Southampton, 2001. https://eprints.soton.ac.uk/426058/.

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The aerodynamics of wings in ground effect has been studied using experimental and computational methods. Wind tunnel tests were used to quantify the effect of the ground on the aerodynamic performance of a wing, with the suction surface nearest to the ground. Features of the flowfield around the wing were investigated using Laser Doppler Anemometry and Particle Image Velocimetry to map the wake at the centre of the wing, and the state of the tip vortex. Initially, a single element configuration was used, both under transition free and transition fixed conditions. The application of Gurney fla

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18

Allan, Mark. "A CFD investigation of wind tunnel interference on delta wing aerodynamics." Thesis, University of Glasgow, 2002. http://theses.gla.ac.uk/4081/.

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To explore the influence of wind tunnel test facilities on delta wing aerodynamics, the interference has been separated into two distinct types, wall interference and support structure interference. The wall interference effects have been split into three further components, tunnel blockage, side wall interference, and roof and floor interference. Splitting the tunnel influence in this way allows us to determine the most detrimental interference effects, thus allowing the wind tunnel engineer to design experiments accordingly. Euler and more realistic RANS simulations of tunnel interference ha

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19

Senior, Andrea Elizabeth. "The aerodynamics of a diffuser equipped bluff body in ground effect." Thesis, University of Southampton, 2002. https://eprints.soton.ac.uk/47113/.

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An investigation of the flow physics of a diffuser equipped bluff body in ground effect has been undertaken. Situated at the rear of a racing car undertray, the diffuser is an important component and the least understood part of the vehicle. Diffuser performance can change dramatically with vehicle ride height. This includes a significant loss in performance at low ride heights which can also be a serious vehicle safety issue. An increased understanding of the diffuser behaviour in ground effect is required to assist design improvements. An accurate experimental database of the flow field is n

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20

Hurst, Edward. "A numerical study of turbulent drag reduction using streamwise travelling waves of spanwise wall velocity." Thesis, University of Warwick, 2013. http://wrap.warwick.ac.uk/67161/.

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A parallelisation of the fully-implicit fractional step based in-house DNS code was implemented. Utilising this, DNS of streamwise travelling waves of spanwise wall velocity in a turbulent channel flow were performed at Reτ = 200; 400; 800 and 1600, scaling the input parameters in wall units. Studying the drag reduction at varying Reynolds number showed that the maximum drag reduction decreased as Re was increased. The scaling with Reynolds number was dependent on the control parameters and therefore the optimal parameters changed with Re. An oscillation in the drag reduction over the forcing

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21

Heyder-Bruckner, Jacques. "The aerodynamics of an inverted wing and a rotating wheel in ground effect." Thesis, University of Southampton, 2011. https://eprints.soton.ac.uk/207263/.

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This study investigates the aerodynamics of nil inverted wing in ground effect, a race car wheel and the interaction between the two components, using numerical and experimental methods. The wheels were located behind the wing at flU overlap and gap of 20mm, and the wing ride height. iu the vertical direction was the primary variable. Models of 50% scale were used , giving a Reynolds number of 5.8 x 105 based on the wing chord . The Detached-Eddy Simulation model was validated against wind tunnel measurements including PIV, surface pressures and forces , where it was found to outperform a Reyn

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22

Ostler, Jon N. "Flight Testing Small, Electric Powered Unmanned Aerial Vehicles." Diss., CLICK HERE for online access, 2006. http://contentdm.lib.byu.edu/ETD/image/etd1223.pdf.

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23

Kuya, Yuichi. "Aerodynamics and multi-fidelity surrogate modelling of an inverted wing with vortex generators in ground effect." Thesis, University of Southampton, 2009. https://eprints.soton.ac.uk/73331/.

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A study of an inverted single-element wing with vortex denerators in ground effect is presented. Counter-rotating and co-rotating rectangular-vane type vortex generators with different device heights are studied on the suction surface of the wing. The primary application of this study is a front wing of race cars. This study comprises three main elements: 1) experimental study, 2) computational study and 3) multi-fidelity surrogate modelling. An experimental testing is performed in a wind tunnel equipped with a moving belt rig, studying time-averaged and unsteady aerodynamic characteristics. T

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24

Gruncell, Brian. "Superhydrophobic surfaces and their potential application to hydrodynamic drag reduction." Thesis, University of Southampton, 2014. https://eprints.soton.ac.uk/363781/.

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Superhydrophobic surfaces appear frequently in the natural world, for example allowing insects to respire underwater and plants, such as the lotus leaf, to have self-cleaning properties. Attempts to mimic these superhydrophobic surfaces have been successful on nano- and micro-scales, with increased effciency of water flowing through micro-channels when the walls are superhydrophobic. This thesis is focused on the proposed use of superhydrophobic surfaces to reduce drag on a much larger scale, applicable to small water craft such as canoes and yachts. The potential for drag reduction using supe

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25

Gumusluol, Unsal. "Experimental Investigation Of Aerodynamic Interactions Of Vehicles In Close Folowing And Passing Situations." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/2/12607287/index.pdf.

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In this Thesis study, aerodynamic interactions of vehicle models in close following and passing situations were investigated expeimentally. Effect of the inter-vehicle spacing and lateral distance on drag coefficients of two close-following vehicles were observed. Two different types of vehicle models were used in order to investigate the shape effect on aerodynamic vehicle interactions. Drag froces and surface pressures of the models at each situation were measured. Two different blockage correction methods on the basis of drag coefficient results were applied. Linear increments of drag coeff

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26

Hamel, Timothy Allen. "The role of the side mirror and A-pillar on automobile wind noise." Thesis, Georgia Institute of Technology, 1996. http://hdl.handle.net/1853/17219.

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27

Akagi, Raymond. "Ram Air-Turbine of Minimum Drag." DigitalCommons@CalPoly, 2021. https://digitalcommons.calpoly.edu/theses/2261.

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The primary motivation for this work was to predict the conditions that would yield minimum drag for a small Ram-Air Turbine used to provide a specified power requirement for a small flight test instrument called the Boundary Layer Data System. Actuator Disk Theory was used to provide an analytical model for this work. Classic Actuator Disk Theory (CADT) or Froude’s Momentum Theory was initially established for quasi-one-dimensional flows and inviscid fluids to predict the power output, drag, and efficiency of energy-extracting devices as a function of wake and freestream velocities using the

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28

Bonnavion, Guillaume. "Dynamics of the unstable wake modes in automotive aerodynamics : from simplified models to real vehicles." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLY010/document.

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Depuis la découverte des modes asymétriques dans le sillage d'un corps simplifié d'automobile, réminiscents d'une bifurcation à bas nombre de Reynolds, se posent des questions propres au développement aérodynamique des véhicules terrestres telles que l'influence du vent latéral, de l'assiette et du rétreint d'arrière-corps couramment utilisé en phase d'optimisation. Notre travail s'attache à répondre expérimentalement à ces questions pour des géométries simplifiées mais aussi réelles. Les essais sont réalisés en soufflerie industrielle à l'échelle 2/5 pour le corps académique et en pleine éche

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29

Munduate, Xabier. "The prediction of unsteady three-dimensional aerodynamics on wind turbine blades." Thesis, Connect to e-thesis, 2002. http://theses.gla.ac.uk/679/.

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Thesis (Ph.D.) -- University of Glasgow, 2002.<br>Ph.D. thesis submitted to the Faculty of Engineering, Department of Aerospace Engineering, University of Glasgow, 2002. Includes bibliographical references. Print version also available.

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30

Fintelman, Daniëlle Maria. "Influence of cycling position and crosswinds on performance and aerodynamics." Thesis, University of Birmingham, 2015. http://etheses.bham.ac.uk//id/eprint/6407/.

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Wind is fundamentally important to cyclists since it affects their performance, bicycle control, balance and road safety. The overall aim of this research is to improve the understanding of the effect of cycling position and crosswinds on the aerodynamics and performance of a cyclist. The first part of this thesis focuses on cycling position. To minimise air resistance, cyclists lower their torso to become more aerodynamic. Results show that lowering torso angle is associated with impairment of physiological functioning, which can be explained by a combination of mechanical and muscular factor

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31

Skinner, Shaun N. "Study of a C-wing configuration for passive drag and load alleviation." Thesis, University of Glasgow, 2018. http://theses.gla.ac.uk/30778/.

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Non-planar wing configurations are often hypothesised as a means for improving the aerodynamic efficiency of large transport aircraft; C-wings may have the ability to exploit and unify drag reduction, aeroelasticity, and dynamics and control but their capacity to do so is ambiguous. The aim of this work is to provide an experimental demonstration with the aim of verifying the C-wing configuration’s potential application for drag and load alleviation. The successful application of a C-wing system for improving the aerodynamic efficiency depends upon the ability to construct the wing system such

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32

de, Fluiter Travis. "Design of lightweigh electric vehicles." The University of Waikato, 2008. http://hdl.handle.net/10289/2438.

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The design and manufacture of lightweight electric vehicles is becoming increasingly important with the rising cost of petrol, and the effects emissions from petrol powered vehicles are having on our environment. The University of Waikato and HybridAuto's Ultracommuter electric vehicle was designed, manufactured, and tested. The vehicle has been driven over 1800km with only a small reliability issue, indicating that the Ultracommuter was well designed and could potentially be manufactured as a solution to ongoing transportation issues. The use of titanium aluminide components in the automotive

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33

Bergman, William H. "A Study of the Standard Cirrus Wing Lift Distribution Versus Bell Shaped Lift Distribution." DigitalCommons@CalPoly, 2020. https://digitalcommons.calpoly.edu/theses/2178.

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This thesis discusses a comparison of the differences in aerodynamic performance of wings designed with elliptical and bell-shaped lift distributions. The method uses a Standard Cirrus sailplane wing with a lift distribution associated with the induced drag benefits of an elliptical distribution (span efficiency = 0.96) as the basis of comparison. The Standard Cirrus is a standard class sailplane with 15-meter wingspan that was designed by Schempp-Hirth in 1969. This sailplane wing was modeled and analyzed in XFLR5, then validated against existing wind tunnel airfoil data, and Standard Cirrus

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34

Musaj, Mimoza. "Computational and experimental investigation of the aerodynamics of a W-shaped leading edge reversed delta plan-form wing." Thesis, City, University of London, 2010. http://openaccess.city.ac.uk/18110/.

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A feasibility analysis for an unconventional W-shaped leading edge, reversed delta plan-form wing has been carried out. The wing is believed to aid the Vertical/Short Take-off and Landing (V/STOL) capabilities of small aircraft. The main focus of the research was to carry out computational investigations of the flow phenomena associated with this unique shaped wing at cruise, take-off, and landing configurations. An interactive numerical and experimental method was used to baseline the important flow-field structures associated with this wing, and to identify the necessary areas for further co

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35

Piskopakis, Andreas. "Time-domain and harmonic balance turbulent Navier-Stokes analysis of oscillating foil aerodynamics." Thesis, University of Glasgow, 2014. http://theses.gla.ac.uk/5604/.

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The underlying thread of the research work presented in this thesis is the development of a robust, accurate and computationally efficient general-purpose Reynolds-Averaged Navier-Stokes code for the analysis of complex turbulent flow unsteady aerodynamics, ranging from low-speed applications such as hydrokinetic and wind turbine flows to high-speed applications such as vibrating transonic wings. The main novel algorithmic contribution of this work is the successful development of a fully-coupled multigrid solution method of the Reynolds-Averaged Navier-Stokes equations and the two-equation sh

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36

Cogan, Donavan. "The aerodynamic design and development of an urban concept vehicle through CFD analysis." Thesis, Cape Peninsula University of Technology, 2016. http://hdl.handle.net/20.500.11838/2386.

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Thesis (MTech (Mechanical Engineering))--Cape Peninsula University of Technology, 2016.<br>This work presents the computational uid dynamics (CFD) analysis of a light road vehicle. Simulations are conducted using the lattice Boltzmann method (LBM) with the wall adapting local eddy (WALE) turbulence model. Simulations include and compare the use of a rolling road, rotating wheels, adaptive re nement as well as showing comparison with a Reynolds-averaged Navier-Stokes (RANS) solver and the Spalart- Allmaras (SA) turbulence model. The lift coe cient of the vehicle for the most part

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37

Castejon, Danilo Vieira. "Métodos de redução do arrasto e seus impactos sobre a estabilidade veicular." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/18/18148/tde-25082011-205657/.

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A crescente preocupação ambiental e a necessidade de se criar produtos mais eficientes têm impulsionado os pesquisadores a realizarem estudos acerca da aerodinâmica veicular. Estes dois fatores constituem os principais motivos, pelos quais existe uma grande procura por conhecimento nesta área. Esta ciência pode ser considerada relativamente nova e ainda carece de uma base de dados. Entender como a aerodinâmica se relaciona com o consumo de combustível nos automóveis, à medida que o arrasto impõe resistência ao deslocamento dos mesmos, é algo que tem estimulado as indústrias automotivas a inves

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38

Ozozturk, Sedat. "Structural And Aeroelastic Analyses Of A Composite Tactical Unmanned Air Vehicle." Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613731/index.pdf.

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In this thesis, computational aerodynamics, structural and aeroelastic analyses of the composite tactical unmanned air vehicle which is designed and manufactured in the Department of Aerospace Engineering are performed. Verification of the structural integrity of the air vehicle is shown at the minimum maneuvering and the dive speeds at the static limit loads which are calculated by the computational aerodynamics analysis of the full aircraft model. In the current work, aerodynamic loads are re-calculated for more accurately determined dive speed angle of attack in an effort to match the overa

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39

Akcali, Fikri. "Experimental Investigation Of Flow Separation From Rigid Walls With Salient Edges." Master's thesis, METU, 2004. http://etd.lib.metu.edu/upload/1097971/index.pdf.

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This thesis presents the experimental results on the formation of flow separation from a rigid wall with a salient edge. In the case of automotive vehicles or aircrafts with rear cargo compartment doors, such salient edges are at the origin of separated wake flows resulting in increased drag and other disturbing effects. Recent studies of Ahmed et al. (1984) on simplified geometries showed the strong influence of the slant angle on the flow separations. In this study, the geometry is further simplified to examine the flow separation under two-dimensional conditions. The experimental configurat

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40

Mariette, Kevin. "Contrôle en boucle fermée pour la réduction active de traînée aérodynamique des véhicules." Thesis, Lyon, 2020. http://www.theses.fr/2020LYSEI088.

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Le contrôle actif de l’écoulement à l’arrière des véhicules se déplaçant à grande vitesse est un moyen de diminuer efficacement la consommation énergétique des véhicules par la réduction de la traînée aérodynamique. L’intérêt des méthodes actives est leur possible adéquation avec des conditions environnementales variables pour une modification minimale de la forme des véhicules, contrairement aux systèmes exclusivement passifs (profilage, ailerons aérodynamiques …). Toutefois, le contrôle actif nécessite un apport d’énergie qui réduit sa rentabilité énergétique finale. À l’aide d’essais expéri

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41

Jebelli, Ali. "Development of Sensors and Microcontrollers for Underwater Robots." Thesis, Université d'Ottawa / University of Ottawa, 2014. http://hdl.handle.net/10393/31283.

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Nowadays, small autonomous underwater robots are strongly preferred for remote exploration of unknown and unstructured environments. Such robots allow the exploration and monitoring of underwater environments where a long term underwater presence is required to cover a large area. Furthermore, reducing the robot size, embedding electrical board inside and reducing cost are some of the challenges designers of autonomous underwater robots are facing. As a key device for reliable operation-decision process of autonomous underwater robots, a relatively fast and cost effective controller based on F

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42

Lai, Kwok Leung. "A numerical study of bluff body flow / submitted by Kwok Leung Lai." 2000. http://hdl.handle.net/2440/19895.

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CD-ROM containing source codes of the numerical scheme (appendix A) is attached to back cover.<br>Includes bibliographical references (leaves 459-472).<br>System requirements for accompanying CD-ROM: Macintosh or IBM compatible computer. Other requirements: Adobe Acrobat Reader.<br>xxxvi, 473 leaves ; ill. ; 30 cm. + 1 computer optical disk (4 3/4 in.)<br>Title page, contents and abstract only. The complete thesis in print form is available from the University Library.<br>A numerical scheme, based on discrete-vortex and surface-vorticity boundary-integral methods, has been developed for stimul

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Abreu, Rual. "Adaptive automotive aerodynamics." Thesis, 2014. http://hdl.handle.net/10210/10793.

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M.Tech. (Mechanical Engineering)<br>This dissertation focuses on understanding the relation between aerodynamic drag and aerodynamic lift in modern passenger cars and explores what effect these forces have on a vehicle. Modern cars are capable of exceptionally high speed and are subjected to large destabilizing lift forces at these speeds. To counteract the effects of positive lift, various aerodynamic devices and body design details are included in the typical car design. These devices often increase the vehicles aerodynamic drag, reducing energy efficiency as speed increases. The problem tha

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Moonan, William C. "Evaluation of the Aerodynamics of an Aircraft Fuselage Pod Using Analytical, CFD, and Flight Testing Techniques." 2010. http://trace.tennessee.edu/utk_gradthes/823.

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The purpose of this study is to investigate the execution and validity of various predictive methods used in the design of the aerodynamic pod housing NASA’s Marshall Airborne Polarimetric Imaging Radiometer (MAPIR) on the University of Tennessee Space Institute’s Piper Navajo research aircraft. Potential flow theory and wing theory are both used to analytically predict the lift the MAPIR Pod would generate during flight; skin friction theory, empirical data, and induced drag theory are utilized to analytically predict the pod’s drag. Furthermore, a simplified computational fluid dynamics (CFD

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(9179864), John Foster. "Advanced Control Strategies for Diesel Engine Thermal Management and Class 8 Truck Platooning." Thesis, 2020.

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<div> <div> <div> <p>Commercial vehicles in the United States account for a significant fraction of greenhouse gas emissions and NOx emissions. The objectives of this work are reduction in commercial vehicle NOx emissions through enhanced aftertreatment thermal management via diesel engine variable valve actuation and the reduction of commercial vehicle fuel consumption/GHG emissions by enabling more effective class 8 truck platooning. </p> <p><br></p><p>First, a novel diesel engine aftertreatment thermal management strategy is proposed which utilizes a 2-stroke breathing variable value actuat

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