Julian Härter, SFB 1313 doctoral researcher at the Institute of Aerospace Thermodynamics (research project A06), will give his milestone presentation on "Experimental Investigation of Self-Pumping Transpiration Cooling" on 2 June 2026.
Julian Härter is a member of the Integrated Reseach Training Group of the SFB 1313 and of SimTech.
Date: Tuesday, 2 June 2026
Time: 10 am
Title: "Experimental Investigation of Self-Pumping Transpiration Cooling"
Place: University of Stuttgart, Campus Vaihingen, Pfaffenwaldring 31, room 1.103
Abstract
Self-pumping transpiration cooling (SPTC) represents a passive cooling concept in which coolant transport through a porous structure is driven entirely by capillary forces, eliminating the need for external pumping systems. This approach offers significant potential for applications exposed to high thermal loads, such as aerospace propulsion systems, combustion chambers, and high temperature energy systems, where cooling performance, and low system complexity are of major importance.
The present work focuses on the experimental investigation of the coupled transport mechanisms governing evaporation-driven cooling in porous media. A dedicated experimental facility was designed and constructed to enable controlled studies of self-pumping transpiration cooling under varying operating conditions. Evaporation mass flow rates were determined using a Mariotte-bottle-based measurement approach, while local surface temperatures were obtained through infrared thermography combined with a dedicated emissivity correction methodology for porous materials.
The experimental results demonstrate the influence of coolant properties, free-stream temperature, Reynolds number, and porous microstructure on evaporation behaviour. Furthermore, the findings reveal a strong coupling between wall temperature, evaporation processes, and heat and mass transfer mechanisms at the porous interface. The observed trends contribute to a deeper understanding of the underlying physical processes governing self-pumping transpiration cooling systems and provide a basis for future investigations and model development.