Test-time extension behind reflected shock waves using CO2-He and C3H8-He driver mixtures

    Authors

    A. R. Amadio; M. W. Crofton;E. L. Petersen

    Comments

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    Abbreviated Journal Title

    Shock Waves

    Keywords

    tailoring; shock tube; reflected shock; chemical kinetics; INTERMEDIATE TEMPERATURES; HIGH-PRESSURES; IGNITION; TUBE; Mechanics

    Abstract

    To study combustion chemistry at low temperatures in a shock tube, it is of great importance to increase experimental test times, and this can be done by tailoring the interface between the driver and driven gases. Using unconventional driver-gas tailoring with the assistance of tailoring curves, shock-tube test times were increased from 1 to 15 ms for reflected-shock temperatures below 1,000 K. Provided in this paper is the introduction of tailoring curves, produced from a one-dimensional perfect gas model for a wide range of driver gases and the production and demonstration of successful driver mixtures containing helium combined with either propane or carbon dioxide. The He/CO2 and He/C3H8 driver mixtures provide a unique way to produce a tailored interface and, hence, longer test times, when facility modification is not an option. The tailoring curves can be used to guide future applications of this technique to other configurations. Nonreacting validation experiments using driver mixtures identified from the tailoring curves were performed over a range of reflected-shock temperatures from approximately 800 to 1,400 K, and some examples of ignition-time experiments that could not have otherwise been erformed are presented.

    Journal Title

    Shock Waves

    Volume

    16

    Issue/Number

    2

    Publication Date

    1-1-2006

    Document Type

    Article

    Language

    English

    First Page

    157

    Last Page

    165

    WOS Identifier

    WOS:000242611600006

    ISSN

    0938-1287

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