Numerical simulations of an idealized pulse detonation engine consisting of a tube closed at one end and open at the other are presented in this paper. Uncertainties noted previously in the specification of open-boundary conditions in one-dimensional simulations are resolved by conducting multidimensional simulations and extracting the needed information. Further confidence in the simulations is gained by comparing some of the computed flow variables with recent experimental data. The results from the simulations are then used to elucidate the detailed features of the flowfield and the role of key parameters that determine the overall propulsive performance. Specific values for the performance measures of a pulse detonation engine operating on a stoichiometric ethylene/oxygen mixture are calculated from the simulations to be 2100 N s/m3 for the impulse (independent of system size), 163-165 s for the mixture-based specific impulse and 725-740 s for the fuel-based specific impulse. The computed performance measures are found to be in good agreement with most experimental data and an explanation is provided where differences are observed. Results from various simulations are used to arrive at a general expression that can be used to estimate the impulse from various detonable mixtures.


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    Title :

    The flowfield and performance of pulse detonation engines


    Contributors:
    Kailasanath, K. (author) / Patnaik, G. (author) / Li, C. (author)


    Publication date :

    2002


    Size :

    7 Seiten, 24 Quellen


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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