Life prediction of the thrust chamber wall of a reusable rocket engine

Xiaowen Dai, Asok Ray

    Research output: Contribution to journalArticle

    13 Citations (Scopus)

    Abstract

    This article presents a continuous-time structural model of the coolant channel ligament in the thrust chamber wall of a reusable rocket engine such as the Space Shuttle Main Engine. The structural analysis is based on the concepts of sandwich beam approximation and viscoplasticity, and captures the nonlinear effects of creep and plasticity interactions to represent the phenomenological effects of inelastic strain ratcheting, progressive bulging-out, and thinning in the thrust chamber wall. The damage of the thrust chamber wall is quantified as a continuous function of time in terms of the current state of ligament thinning and its critical value. The structural model has been validated for prediction of the ligament thinning by comparison with the finite element models of the thrust chamber wall structure for two different materials, namely, oxygen-free high-conductivity copper and a copper-zirconium-silver alloy called NARloy-Z. The results of parametric studies are presented to show how the service life of the thrust chamber wall is influenced by coolant channel design, ligament material, and load cycle duration. Due to its computational efficiency, this model is suitable for on-line applications of service-life prediction and damage analysis of the thrust chamber wall and also permits parametric studies for off-line synthesis of damage mitigating control systems.

    Original languageEnglish (US)
    Pages (from-to)1279-1287
    Number of pages9
    JournalJournal of Propulsion and Power
    Volume11
    Issue number6
    DOIs
    StatePublished - Jan 1 1995

    Fingerprint

    reusable rocket engines
    Reusable rockets
    thrust chambers
    Ligaments
    Rocket engines
    ligaments
    engine
    thrust
    prediction
    predictions
    Service life
    Coolants
    thinning
    service life
    coolants
    Silver alloys
    damage
    Viscoplasticity
    Copper
    Zirconium alloys

    All Science Journal Classification (ASJC) codes

    • Fuel Technology
    • Aerospace Engineering
    • Mechanical Engineering
    • Space and Planetary Science

    Cite this

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    title = "Life prediction of the thrust chamber wall of a reusable rocket engine",
    abstract = "This article presents a continuous-time structural model of the coolant channel ligament in the thrust chamber wall of a reusable rocket engine such as the Space Shuttle Main Engine. The structural analysis is based on the concepts of sandwich beam approximation and viscoplasticity, and captures the nonlinear effects of creep and plasticity interactions to represent the phenomenological effects of inelastic strain ratcheting, progressive bulging-out, and thinning in the thrust chamber wall. The damage of the thrust chamber wall is quantified as a continuous function of time in terms of the current state of ligament thinning and its critical value. The structural model has been validated for prediction of the ligament thinning by comparison with the finite element models of the thrust chamber wall structure for two different materials, namely, oxygen-free high-conductivity copper and a copper-zirconium-silver alloy called NARloy-Z. The results of parametric studies are presented to show how the service life of the thrust chamber wall is influenced by coolant channel design, ligament material, and load cycle duration. Due to its computational efficiency, this model is suitable for on-line applications of service-life prediction and damage analysis of the thrust chamber wall and also permits parametric studies for off-line synthesis of damage mitigating control systems.",
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    Life prediction of the thrust chamber wall of a reusable rocket engine. / Dai, Xiaowen; Ray, Asok.

    In: Journal of Propulsion and Power, Vol. 11, No. 6, 01.01.1995, p. 1279-1287.

    Research output: Contribution to journalArticle

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