This work addresses the issues of decreased efficiency and static pressures of a centrifugal fan under variable working conditions (VWCs). A design method for the volute radius with flow-correcting coefficients and an area factor was proposed. The model of the design method was solved using genetic algorithms in MATLAB. The volute was designed for two cases: with area constraints and without area constraints. Computational fluid dynamics was used in the numerical simulations of the original fan and the two others with modified volute under VWCs, and corresponding performance curves were obtained. The internal flow fields of the three types of fan volutes were analysed for the cases under 40%, 100%, and 130% loads. The results indicate that the efficiency and static pressure of the two designed fans were improved under VWCs. The backwash at the outlet tongue, volute outlet static pressure fluctuation, and the swirl effects inside the volute were all reduced. The volute fan with area constraints exhibited the best performance under VWCs.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Design of volute shape of centrifugal fans




    Publication date :

    2016




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English



    Classification :

    BKL:    52.50 Energietechnik: Allgemeines / 52.30 Strömungskraftmaschinen, Turbomaschinen / 52.30 / 52.50
    Local classification TIB:    275/5345/5365/5500




    Volute of centrifugal fan, centrifugal fan provided with same and air conditioning system

    CAO LEI / ZOU JIANHUANG / GENG FUSHUAI et al. | European Patent Office | 2020

    Free access


    Stall inception induced by the volute tongue at centrifugal compressor inlet

    Yang, Ce / Wang, Yingjun / Tong, Ding et al. | SAGE Publications | 2017


    Numerical Optimization of Volute Outlet Structure for Forward-Curved Centrifugal Fan

    Liu, X. / Yuan, M. / Mao, Y. | British Library Online Contents | 2009