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Tuesday, July 7, 2020 | History

3 edition of Aerodynamic drag reduction tests of a box-shaped vehicle found in the catalog.

Aerodynamic drag reduction tests of a box-shaped vehicle

Aerodynamic drag reduction tests of a box-shaped vehicle

final report

  • 20 Want to read
  • 23 Currently reading

Published by California Polytechnic State University, Aeronautical Engineering Dept., National Aeronautics and Space Administration, National Technical Information Services, distributor in San Luis Obispo, Calif, [Washington, D.C, Springfield, Va .
Written in English

    Subjects:
  • Motor vehicles -- United States -- Aerodynamics,
  • Motor vehicles -- Fuel consumption -- United States,
  • Trucks -- United States -- Aerodynamics

  • Edition Notes

    Statementprincipal investigators: Randall Lee Peterson, Doral R. Sandlin
    SeriesNASA contractor report -- NASA CR-176982
    ContributionsSandlin, Doral R, United States. National Aeronautics and Space Administration
    The Physical Object
    FormatMicroform
    Paginationviii, 44 p.
    Number of Pages44
    ID Numbers
    Open LibraryOL14984500M

    The extra lift and reduced drag cuts back on the quantity of fuel that the engines must burn. If the jet were built today from standard aluminum alloys it could provide a 50% reduction in fuel use, according to the MIT designers; a low-mass polymer-composite version could give 70% efficiency gains. Although this book is intended mainly to introduce senior undergraduate and beginning graduate students to the study of ground vehicles, it should also interest engineers and researchers in the vehicle industry. This book deals with the theory and engineering principles of nonguided ground vehicles, including road, off-road, and air-cushion.

      This chapter examines the loads on ships and offshore structures. Continuation of improvements to the computational speeds of computers makes nonlinear time domain methods more applicable to the design process. The wind resistance of a vehicle’s design elements. Aerodynamic vehicles claim to offer increased performance and reduced wind noise while moving. See Coefficient of Drag. Agent. A representative of the insurance agency, licensed by the state, who solicits, negotiates, and countersigns the contract.

    The vehicle lands with its full weight on one of the two A-pillars, which may only deform slightly if the vehicle is to pass the test. And the new SLK-Class came through this roof-drop test with. A significant book, Unsafe at Any Speed by Ralph Nader, criticized vehicle manufacturers’ focus on comfort rather than safety. ments played a huge role in developing modern repair processes.


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Aerodynamic drag reduction tests of a box-shaped vehicle Download PDF EPUB FB2

Get this from a library. Aerodynamic drag reduction tests of a box-shaped vehicle: final report. [Randall Lee Peterson; Doral R Sandlin; United States.

National Aeronautics and Space Administration.]. Aerodynamic drag tests were performed on a tractor-trailer combination and a box-shaped ground vehicle using the coast-down method on a smooth, nearly level runway.

The tractor-trailer tests included an investigation of drag reduction add-on devices that are commercially available or under development. There is drag, but mainly caused by friction between the layers of air moving past one another at different speeds.

Notice how the air becomes more turbulent behind the car and vortices start to occur in the wake. Bottom: Form drag: A box-shaped vehicle (such as a large truck) makes no attempt to divert air around itself.

Tractor-Trailer Combination and a Representative Box-Shaped Ground Vehicle,” SAE Paper10 Reidy, L. W., “Flat plate drag reduction in a water tunnel using riblets,” NOSC Tech Author: Lakshmi Sankar.

Montoya LC and Steers LL () Aerodynamic drag reduction tests on a full-scale tractor-trailer combination with several add-on devices.

NASA TM X - Google Scholar 9. Making aerodynamic improvements of a large passenger vehicle (e.g. bus) is an important field f or possible fuel consumption reduction. In this paper, we have focused on designing a new exterior. drag aspects of a box-shaped van. vehicle was approximat kg (32, Ib).

General specifications of this vehicle are given in Table 1. For the drag tests, the baseline vehicle was tested and then. modified to the low-drag configuration. comparisons are made on the basis of the reduction in aerodynamic drag coefficient from the.

Figure Wake of a VW Golf I, photographed as in Fig. smoke introduced into the wake The aerodynamic drag D, as well as the other force components and moments, increases with the square of the vehicle speed V: D~V2 () With a medium-size European car, aerodynamic drag accounts for nearly 80 per cent of the total road resistance at where \(C_{D}\) is the drag coefficient, and as before, \(\rho\) is the density of air, \(V\) is the wind speed relative to the vehicle, and \(A\) is the cross-sectional area of the vehicle body.

The drag coefficient expresses the effect of vehicle shape independently of any other factor, so that the \(C_{D}\) value for a car of a given shape remains the same if the car is doubled in size, for.

Aerodynamic Drag Scoping Work. SciTech Connect. Voskuilen, Tyler; Erickson, Lindsay Crowl; Knaus, Robert C. This memo summarizes the aerodynamic drag scoping work done for Goodyea. In order to gain experience with the towing tank as a tool for vehicle aerodynamic studies, preliminary experiments with a bluff body with out any ground effect were carried out.

The box-shaped body corresponds to a simplified European trailer at a scale of For trucks, a reduction of approximately 10 percent in drag results in a fuel savings of about 5 percent, or nearly gallons per year.

Air resistance hp Rolling resistance hp 75 50 25 0 10 20 30 40 50 60 70 Vehicle speed, mi/h MOTOR VEHICLE ENGINES Fig. Aerodynamic drag effect on truck power requirement to. In this work an emerging hydrokinetic energy technology, Tethered UnderSea Kites (TUSK), is studied.

One TUSK concept uses an axial-flow turbine mounted on a rigid underwater kite to extract power from an ocean current or tidal flow. A second concept removes the turbine from the kite, and instead generates power by transmitting hydrodynamic forces on the kite through the flexible.

The focus of the work is on the evaluation, development and integration of a robust actuator system for three-dimensional flow control of a blown Coanda flap to improve the high lift system of commercial aircraft. As part of the research work presented, the system is integrated into a wind tunnel model in order to influence the flow across the entire width of the model.

The system developed is. That, too, happens nominally. MASCOT, the box-shaped instrument rack made of sturdy carbon bre composite measuring 30 x 20 x 20 centimetres and weighing just 10 kilograms, came to a standstill.

The gravitational pull on Ryugu is only about one sixty-thousandth of that on Earth, which means that MASCOT weighs less than one gram there. An electromechanical system is described that uses magnetic fields to induce eddy currents and generate lift.

A magnet configuration that can be employed in the system is illustrated. The magnet configuration can be used to generate lifts and / or thrusts. Lift and thrust predictions for various magnet configurations are provided.

An arrangement of a hover engine capable of employing a magnet. This banner text can have markup. web; books; video; audio; software; images; Toggle navigation. Pads sizing pads to 30 years, these policies and motor vehicle – to protect your head before all the details to send out that this when it will love the entry.

The minimum safety features inside to max capacity is cpsc-certified. Models do some of an aerodynamic helmet that can not a good health. An illustration of an open book. Books. An illustration of two cells of a film strip. Video. An illustration of an audio speaker. Audio. An illustration of a " floppy disk.

Software. An illustration of two photographs. Full text of "Advances In Vehicle Design John Fenton". A wind tunnel investigation is conducted to evaluate the performance of both commercially- available and prototype aerodynamic drag reduction device s for modern class 8 heavy ve- hicles.

Drag force measurements are made on three full-scal e, heavy vehicle configurations at a Reynolds number of 4. 6 × 10 6 based upon the vehicle width. The. vehicle hover engine Prior art date Application number PCT/US/ Other languages French (fr) Inventor D.

Gregory Henderson Shauna Moran Mitchell Dougherty Victor Espinoza Robert William Melvin James Janicki David P. OLYNICK Original Assignee Arx Pax, LLC Priority date (The priority date is an assumption and is not a legal.Mercedes-Benz GL-Class. In the SUV world, the new Mercedes-Benz GL-Class is setting new standards in comfort, dynamics, safety, elegance and efficiency and with this spectrum it is regarded as the S-Class among off-road vehicles.

This premium SUV is able to demonstrate its exceptional capabilities in everyday situations with dense city traffic, over very winding roads or on well-built.There are numerous ways to improve fuel economy in vehicles, including increasing engine efficiency, reducing aerodynamic drag and rolling friction, and improving the fuel quality among other things.