STP1522

    An Approach to Understanding Flow Friction Ignition: A Computational Fluid Dynamics (CFD) Study on Temperature Development of High-Pressure Oxygen Flow Inside Micron-Scale Seal Cracks

    Published: Jan 2009


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    Abstract

    Flow friction ignition of non-metallic materials in oxygen is a poorly understood heat-generating mechanism thought to be caused by oxygen flow past a non-metallic sealing surface. Micron-scale fatigue cracks or channels were observed on non-metallic sealing surfaces of oxygen components and could provide a leak path for the high-pressure oxygen to flow across the seal. Literature in the field of micro-fluidics research has noted that viscous dissipation, a heat-generating mechanism, may not be negligible as the flow dimension of the channel is reduced to the micron-scale. Results of a computational fluid dynamics study are presented and used to determine if temperatures developed in high-pressure driven micro-channel oxygen flows are capable of reaching the reported autogenous ignition temperature of non-metallic materials in oxygen.

    Keywords:

    flow friction ignition, viscous heating, oxygen fires, microchannel flow, cylinder valves, CGA 870 seals, computational fluid dynamics, stagnation heating


    Author Information:

    Hooser, Jared D.
    Wendell Hull and Associates, Inc., Las Cruces, NM

    Wei, Mingjun
    Assistant Professor, New Mexico State Univ., Las Cruces, NM

    Newton, Barry E.
    VP R&D, Wendell Hull and Associates, Inc., Las Cruces, NM

    Chiffoleau, Gwenael J. A.
    Senior Scientist, Test Facility Manager, Wendell Hull & Associates, Inc., Las Cruces, NM


    Paper ID: STP48845S

    Committee/Subcommittee: G04.02

    DOI: 10.1520/STP48845S


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