On the stress problem of the pebble bed heat exchanger in a hypersonic wind tunnel

Bapu Rao, MN and Kamath, Ashok (1987) On the stress problem of the pebble bed heat exchanger in a hypersonic wind tunnel. Technical Report. National Aeronautical Laboratory, Bangalore, India.

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    Abstract

    The stress prob1ens of pebble bed heat exchanger in the13; hypersonic wind tunnel at IISc, Bangalore, is investigated. The investigation is carried out in two stages: the first stage deals with the problem encountered during the preheating of pebble bed,13; while in the second stage pressure loading arising from tunnel blowdowns is considered. The heat transfer and the associated thermal stress problems of stage one as also the problem of pressure loading in th e presence of temperature occuring in stage two are analyzed using the finite element method with the aid of NASTRAN and ASKA software packages. The results obtained indicate the presence of stress concentration in the disc-flange13; region at the entry section and in the ellipsoidal capnear the exit section of pebble bed heat exchanger. The significance of finite element results presented with the aid of FEMVIEW interactive graphic processor is discussed in detail.

    Item Type: Proj.Doc/Technical Report (Technical Report)
    Uncontrolled Keywords: Pebble bed heat exchanger;Hypersonic tunnel;ASKA;NASTRAN
    Subjects: ENGINEERING > Structural Mechanics
    Division/Department: Structures Division, Structures Division
    Depositing User: M/S ICAST NAL
    Date Deposited: 09 Oct 2006
    Last Modified: 24 May 2010 09:51
    URI: http://nal-ir.nal.res.in/id/eprint/2922

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