Fuel-Rich Gas Generator Vacuum Testing to Validate Performance Improvements (FRiGG)

Recent testing at MSFC yielded unexpected results for gaseous oxygen and gaseous methane (GOx-GCH4) combustion systems. Measured combustion temperatures exceed theoretical chemical equilibrium predictions, contrasting with historical liquid-liquid propellant behavior falling below equilibrium. Combustion temperatures appear agnostic to injector type. These findings warrant validation through an independent test effort with a traceable thrust measurement system. Applications include, but are not limited to, Reaction Control System (RCS) thrusters.

The proposed work is expected to deliver several high value outcomes that advance both propulsion science and permeable additive manufacturing technologies: - Mission or Program value: The outcomes support architectures requiring reliable, high performance RCS systems. - Science and Engineering Improvements: The effort addresses key unknowns in combustion physics and materials development. New datasets will refine equilibrium performance models for methane–oxygen systems, improving prediction accuracy and informing future engine design. - Risk Reduction or Infusion Potential: This work reduces technical risk for future missions that may rely on RCS systems or thermal management solutions that have the potential to increase hardware life with improved cooling and propellant dispersion for increased combustion efficiency.

This is a mature technology (TRL 7+) — the realistic path in is usually NASA's Technology Transfer Program: licensing an existing NASA patent, or a Space Act Agreement to use NASA facilities/expertise directly. NASA also runs a startup licensing program with no upfront fee for companies formed to commercialize a specific NASA technology.

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