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Saturday, May 9, 2020 | History

1 edition of aerodynamic analysis of single and multiple vehicles [entering and traveling in open tunnels] found in the catalog.

aerodynamic analysis of single and multiple vehicles [entering and traveling in open tunnels]

Charles R. Strom

aerodynamic analysis of single and multiple vehicles [entering and traveling in open tunnels]

by Charles R. Strom

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  • 5 Currently reading

Published by Dept. of Transportation, Federal Railroad Administration, Office of Research, Development, and Demonstration, for sale by the National Technical Information Service in Washington, Springfield, Va .
Written in English

    Subjects:
  • Aerodynamics.,
  • Railroad tunnels.,
  • Drag (Aerodynamics),
  • Railroads -- United States -- Cars.

  • Edition Notes

    StatementCharles R. Strom.
    SeriesReport - Federal Railroad Administration ; no. FRA-ORD&D-75-16, Report (National Institute of Standards and Technology (U.S.)) -- no. FRA-ORD&D-75-16.
    ContributionsMitre Corporation., United States. Federal Railroad Administration. Office of Research, Development and Demonstration.
    The Physical Object
    Paginationvii, 43 p. :
    Number of Pages43
    ID Numbers
    Open LibraryOL17815781M

    The aerodynamic efficiency of a car's shape is measured by its co-efficient of drag (generally known as its Cd figure). For example, a flat plate held at right angles to the airflow has a Cd of , whereas the most efficient production car shapes at the moment have a Cd of about sensitivity analysis on the modelling of turbulence and the grid generation parameters, simulations are performed at different air speed to determine the pressure and shear contributions to the lift and drag coefficients. For the GT2 car, the drag and lift coefficients are around C .

    Road vehicle aerodynamic design - an introduction This book provides an introduction to road vehicle aerodynamic design for students, engineers and designers working in the automotive field. A description of the basic mechanisms of lift and drag production on road vehicles (domestic cars, commercial vehicles and track racing cars) is given. tunnels to be built through the Alps (the Lyon-Torino connection with a 54 km long tunnel [2] or the Swiss AlpTransit project with about km of tunnels) and the new Maglev Yamanashi test line in Japan, which has 82% of tunnels on km [3]. Some aerodynamic problems are peculiar to the passage of a high-speed train in a tunnel and do.

    Aerodynamic Effects in Railway Tunnels as Speed is Increased dium length, the unsteadiness of the flow is due to the train-tunnel entry pres-sure waves. The transmission of these pressure waves inside coaches generates a comfort problem since the internal ear of the human being is very sensitive to pressure level changes (amplitude and rate).   eBook is an electronic version of a traditional print book THIS can be read by using a personal computer or by using an eBook reader. (An eBook reader can be a software application for use on a computer such as Microsoft's free Reader application, or a book-sized computer THIS is used solely as a reading device such as Nuvomedia's Rocket eBook.


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Aerodynamic analysis of single and multiple vehicles [entering and traveling in open tunnels] by Charles R. Strom Download PDF EPUB FB2

Get this from a library. Aerodynamics analysis of single and multiple vehicles entering and traveling in open tunnels. [Charles R Strom; United States. Federal Railroad Administration. Office of Research, Development, and Demonstrations.; Mitre Corporation.].

Through on-road test [1] and CFD analysis [2,3,4], we have studied unsteady aerodynamic characteristics around a vehicle for pitching motion during straight-line high speed driving.

using correct analysis techniques when evaluating aerodynamic performance for cornering vehicles. Introduction. Aerodynamic performance through a corner is a critical design consideration for a number of applications.

Highly maneuverable. aircraft and racing vehicles are some examples. When a vehicleCited by: 1. Aerodynamic Testing of Road Vehicles in Open Jet Wind Tunnels (S P (Society of Automotive Engineers)) on *FREE* shipping on qualifying offers. Aerodynamic Testing of Road Vehicles in Open Jet Wind Tunnels (S P (Society of Automotive Engineers)).

multiple formats at ; page images at HathiTrust; US access only; Items below (if any) are from related and broader terms. Filed under: Railroad tunnels.

Annual report of the commissioners on the Troy and Greenfield R.R. and Hoosac Tunnel: together with the reports of chief and consulting engineers.

The experimental investigations will be performed on an open circuit section type wind tunnel having 30 cm × 30 cm × cm test section, on a geometrically similar,reduced scale () Maruti Esteem car wooden model is use and results like drag force, pressure distribution, wake region will investigated for aerodynamic analysis.

The system key element is the capacity to manage the whole vehicle heat rejection need with a single layer radiator enabling the redesign of the front end so reducing the aerodynamic drag and.

In this article, the processes of vans running into a one-way two-lane road tunnel are simulated numerically using the dynamic mesh technique and RNG k − ɛ turbulence model. The transient aerodynamic characteristics around vans are obtained in three cases: a single van, two vans side-by-side and two vans one after another running into the tunnel, respectively.

In the simulation model, the cross section area of tunnel is m 2, and the type of train model is CRH3, the train cross section area is m Speed of train is km/h.

The Length of tunnel is m. The mesh of tunnel and train are shown in Fig. 1, and the total dimension of numeral simulation model is shown in Fig. Download: Download high-res image (1MB). Bourquin V.: Reduced-scale aerodynamic testing of high-peed vehicles in tunnels, PhD Thesis no.

EPFL, Lausanne, Google Scholar Schultz M., Sockel H.: Pressure transients in short tunnels, Proc. of the 7th Int. Symp. on the aerodynamics ventilation of vehicle tunnels, Brighton (UK),p. – Google Scholar. 1 Aerodynamic study of different cyclist positions: CFD analysis and full-scale wind-tunnel tests Thijs Defraeye a, *, Bert Blocken b, Erwin Koninckx c, Peter Hespel c and Jan Carmeliet d,e a Laboratory of Building Physics, Department of Civil Engineering, Katholieke Universiteit Leuven, Kasteelpark Arenb Heverlee, Belgium.

to perform a flight dynamics analysis of the UCAV configuration. The purpose of this analysis is to compare the flying qualities as derived from wind tunnel data with the results determined on the basis of data from VSAERO, a low-fidelity aerodynamic tool used in preliminary aircraft design.

/,67 2) 6. aerodynamic designs vehicles. The aerodynamic drags of a road vehicle is responsible for a large part of the vehicle’s fuel consumption and contribute up to 50% of the total vehicle fuel consumption at highway speeds.

Review on the research performance of active and passive flow control on the vehicle. Aerodynamic analysis of vehicles in the cornering condition is an important design parameter, particularly in motorsport. Most racing-cars are designed to produce downforce that will compromise straight-line speed to allow large gains to be made in the corners.

Aerodynamic Analysis of Space Access Vehicles SPACE ACCESS VEHICLES From the early days of space travel and exploration to the present surge in commercialization of space, Calspan has and continues to play an integral role in the development of space.

Analysis of aerodynamic loading properties on hood of high-speed railway tunnel aerodynamic load (static analysis, unit: Pa). only single-top open-ing hood is chosen for doing dynamic analysis. That is the pressure on each monitoring surface was set on the hood structure.

Analysis of Resistances to Motion Aerodynamic Drag Tire Rolling Resistance Ratio of Aerodynamic Drag to Tire Rolling Resistance Aerodynamics of.

With the increase in train speed, the aerodynamics in tunnels is emerging. In recent years, we have carried out a few full-scale tests about tunnel aerodynamics, and the law of influence of train speed on pressure change, airflow velocity, and micropressure wave are obtained, and a passenger comfort survey was conducted.

The aerodynamic drags of different reference car models were investigated to calibrate the performance of the Automotive Wind Tunnel in Jilin University. The two kinds of reference models--MIRA and SAE reference car models were involved in this paper, considering the actual situation of the Automotive Wind Tunnel in Jilin University.

The results of the research show that the Automotive Wind. In this paper, the aerodynamic effects of high-speed train passing in tunnels are investigated in numerical calculation method of hydromechanics. According to the actual situation of flow filed when the train through the tunnel, the flow geometry model is set up.

The flow problem is described by Navier-Stokes equations of unsteady viscous compressible fluid and k-e two equations turbulent model. The capacity and quality of the atmospheric flight performance of space flight vehicles is characterized by their aerodynamic data bases. A complete aerodynamic data base would encompass the coefficients of the static longitudinal and lateral motions and the related dynamic coefficients.

In this book the aerodynamics of 27 vehicles are considered. Engineering Analysis of Flight Vehicles was originally aimed ata very narrow target -- the trained but unspecialised engineer, whosefirst exposure to aeronautical engineering would come in graduate school through this book.

It hits that target quite well, with one warning I will mention below. What if you are not that graduate student? It s: 3.some principles of automotive aerodynamic testing in wind tunnels with examples from slotted wall test section facilities The various factors related to obtaining high quality data from automotive aerodynamic wind tunnel tests are outlined.