Abstract
Electrical capacitance tomography (ECT) is a noninvasive advanced measurement technique with the potential to be applied to cryogenic propellant monitoring in microgravity environments. This paper briefly introduces common propellant measurement techniques and reviews the development of capacitive methods for cryogenic fluid measurements. At present, ECT at cryogenic environment has only successfully reconstructed phase distribution images in liquid nitrogen–vapor nitrogen static stratified flow experiments. Sensor structure, micro-capacitance measurement technology, multi-flow pattern test, and dynamic experiment still need to be further studied.
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