Thermal Gravitational Modelling and Scaling of Two-Phase Heat Transport Systemsfor Space: An Assessment and a Comparison of Predictions and Experimental Results

摘要

Terrestrial scaling experiments, using the NLR ammonia test rig, are foreseen tosupport the development of the ESA capillary pumped two-phase ammonia experiment (TPX) in Get Away Special G-357 and the development of the mechanically pumped ESA R114 Two-Phase Heat Transport System (TPHTS). The assessment of the applicability (validity and restrictions) of the NLR modeling & scaling approach, based on similarity considerations, is supported by a comparison of measured two-phase flow pressure drops under low-gravity conditions and thermal gravitational modeling and scaling outcomes.