Abstract Forced convective heat transfer is an important factor that affects the thermal characteristics of airships. In this paper, the steady state forced convective heat transfer around an ellipsoid is numerically investigated. The numerical simulation is carried out by commercial computational fluid dynamic (CFD) software over the extended Re range from 20 to 108 and the aspect ratio from 2 to 4. Based on the regression and optimization with software, a new piecewise correlation of the Nusselt number at constant wall temperature for ellipsoid is proposed, which is suitable for applications to airships and other ellipse shaped bodies such as elliptical balloons. The thermal characteristics of a stratospheric airship in midsummer located in the north hemisphere are numerical studied. The helium temperature predicated using the new correlation is compared to those predicted by correlations applicable for spheres and flat plates. The results show that the helium temperature obtained using the new correlation at noon is about 5.4K lower than that using the correlation of spheres and about 2.1K higher than that of flat plates.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Numerical study of forced convective heat transfer around airships


    Contributors:
    Dai, Qiumin (author) / Fang, Xiande (author)

    Published in:

    Advances in Space Research ; 57 , 3 ; 776-781


    Publication date :

    2015-11-26


    Size :

    6 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English





    Numerical study of forced convective heat transfer around a spherical aerostat

    Dai, Qiumin / Fang, Xiande / Xu, Yu | Elsevier | 2013


    TURBULENT FORCED CONVECTIVE HEAT TRANSFER

    Murray, J. / S, E. / International Council of the Aeronautical Sciences | British Library Conference Proceedings | 2004


    Modeling Transient Heat Transfer in Stratospheric Airships

    Alam, Mohammad I. / Pant, Rajkumar S. | AIAA | 2016