Computational analysis of methane-air venturi mixer for optimum design

Essam Abo-Serie, M Özgur, K Altinsik

    Research output: Chapter in Book/Report/Conference proceedingConference proceedingpeer-review

    Abstract

    Supplying a homogeneous mixture of gas fuel and air to a combustion chamber is a challenging problem. Having a good mixture leads to better fuel economy and low combustion emissions. In this study, a venturi-mixer prototype has
    been developed for mixing natural gas with air flowing in a pipe. The aim is to provide a better spatial mixing within a short distance from the injection point while keeping small pressure drop. A standard ASME venturi design has been
    adopted in this study with a throat to pipe diameter ratio 0.4. A three-dimensional CFD simulation together with Taguchi optimization technique has been employed to study the effect of fuel injection geometrical parameters on the mixing process. The simulation was carried out assuming isothermal conditions while taking into account the turbulence by considering SST k – ω model. The optimized parameters that has been studied are the hole diameter,
    number and intrusion distance inside the venturi from the throat wall. The uniformity of the fuel mass fraction at a distance equal to the pipe diameter has been evaluated using the uniformity index function and accordingly, the optimum design values for the three design parameters have been identified. It was shown that with an optimum design it is possible to achieve a uniformity index of 91% with further improvement downstream the pipe.
    Original languageEnglish
    Title of host publicationProceedings of the 13th International Combustion Symposium, Bursa, Turkey
    Pages9-11
    Number of pages3
    Publication statusPublished - 2015
    Event13th International Combustion Symposium - Bursa, Turkey
    Duration: 9 Sept 201511 Sept 2015

    Conference

    Conference13th International Combustion Symposium
    Country/TerritoryTurkey
    CityBursa
    Period9/09/1511/09/15

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