Optimisation of tin can thermal ballast requirements of blowdown wind tunnels

Achar, Narahari BN (1963) Optimisation of tin can thermal ballast requirements of blowdown wind tunnels. Technical Report. National Aeronautical Laboratory, Bangalore, India.

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    Abstract

    This note presents the results of an investigation undertaken to obtain engineering data regarding the economical use of tin cans as thermal ballast in the air receivers of blowdown wind tunnels. A simple analysis shows that a loading ratio of 2 to 3 would be sufficient to limit the temperature drop to about 20xB0;C. Using tin cans of several sizes to find out the relative importance of dimensional parameters such as diameter and cylinder length, an attempt has been made to determine the average surface area per cubic foot of space occupied by randomly stacked tin cans, as the available surface area is very important for effective heat transfer. The possibility of effecting a compromise between cost and thermal ballast efficiency13; in optimising the dimensions of tin cans for a given weight of the ballast is indicated.

    Item Type: Proj.Doc/Technical Report (Technical Report)
    Uncontrolled Keywords: Trisonic wind tunnel;Tin can;Thermal ballat;Blowdown;Heat transfer
    Subjects: AERONAUTICS > Aerodynamics
    Division/Department: Aerodynamics
    Depositing User: Mr. Ravikumar R
    Date Deposited: 12 Jan 2007
    Last Modified: 24 May 2010 09:54
    URI: http://nal-ir.nal.res.in/id/eprint/3905

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