Mathematical models of pressure transients accompanied with cavitation and gas bubbles are studied in this paper to describe the flow behavior in a hydraulic pipeline. The reasonable prediction for pressure transients in a low pressure hydraulic pipeline largely depends on several unknown parameters involved in the mathematical models, including the initial gas bubble volumes in hydraulic oils, gas releasing and resolving time constants. In order to identify the parameters in the mathematical models and to shorten the computation time of the identification, a new method parallel genetic algorithm (PGA)is applied in this paper. Based on the least-square errors between the experimental data and simulation results, the fitness function of parallel genetic algorithms is programed and implemented. The global optimal parameters for hydraulic pipeline pressure transient models are obtained. The computation time ofparallel genetic algorithms is much shorter than that of serial genetic algorithms. By using PGAs, the executing time is 20 h. However, it takes about 204 h by using GAs. Simulation results with identified parameters obtained by parallel genetic algorithms agree well with the experimental data. The comparison between simulation results and the experimental data indicates that parallel genetic algorithms are feasible and efficient to estimate the unknown parameters in hydraulic pipeline transient models accompanied with cavitation and gas bubbles.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Modeling of hydraulic pipeline transients accompanied with cavitation and gas bubbles using parallel genetic algorithms


    Contributors:
    Li, Songjing (author) / Yang, Chifu (author) / Jiang, Dan (author)

    Published in:

    Publication date :

    2008


    Size :

    8 Seiten, 11 Bilder, 4 Tabellen, 18 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




    Modeling collapse aggressiveness of cavitation bubbles in hydromachinery

    Zima, Patrik / Sedlar, Milan / Müller, Milos | Tema Archive | 2009




    Trapping cavitation bubbles with a self-focused laser beam

    Jing Yong Ye, / Tse, C. / Guoqing Chang, et al. | IEEE | 2004


    Dynamics and Noise Emission of Vortex Cavitation Bubbles

    Choi, J. / Hsiao, C.-T. / Chahine, G.L. et al. | British Library Conference Proceedings | 2007