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NASA NTRS · 20260003375

Extending mARC II Arc-Jet Test Duration via Design and Implementation of Model System Cooling Sleeve

Kathleen M Edwards·Jocelino Rodrigues·Daniel Philippidis
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Abstract

The mARC II is a 30 kW arc-jet facility at NASA Ames Research Center used to generate high-enthalpy flows for low-cost thermal protection system (TPS) technology development. Sustained operation of downstream instrumentation and material samples is constrained by thermal loading transmitted through the arc-jet test environment, limiting achievable run times and experimental throughput. This work presents the design, integration, and validation of a cooling sleeve implemented on the sweep arm drive motor feedthrough to mitigate thermal accumulation during testing. The addition of the cooling sleeve is a simple, robust upgrade that translates directly into enhanced facility capability by supporting longer run durations, reduced turnaround time, and higher throughput.

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sting armmodel holdermodel injection systemsample insertionmodel insertionmaterial testingTPS screeningmaterial screeningTPS testingTPSthermal expansionmechanical deformationmechanical stressnumerical modelingnumerical simulationsexperimentalground testinginsertionfluid mechanicsthermophysicsarc-jetheat transferdeformationsweep arm

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Kathleen M Edwards, Jocelino Rodrigues, Daniel Philippidis. Extending mARC II Arc-Jet Test Duration via Design and Implementation of Model System Cooling Sleeve. https://ntrs.nasa.gov/citations/20260003375

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HEAT TRANSFER subjectNumerical Modeling subjectTPS subjectdeformation subject

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Extending mARC II Arc-Jet Test Duration via Design and Implementation of Model System Cooling Sleeve

The mARC II is a 30 kW arc-jet facility at NASA Ames Research Center used to generate high-enthalpy flows for low-cost thermal protection system (TPS) technology development. Sustained operation of downstream instrumentation and material samples is constrained by thermal loading transmitted through the arc-jet test environment, limiting achievable run times and experimental throughput. This work presents the design, integration, and validation of a cooling sleeve implemented on the sweep arm drive motor feedthrough to mitigate thermal accumulation during testing. The addition of the cooling sleeve is a simple, robust upgrade that translates directly into enhanced facility capability by supporting longer run durations, reduced turnaround time, and higher throughput.

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