Ecole Nationale de l'Aviation Civile
Toutes les publications de l'ENAC en direct.
All ENAC publications.
Cryogenic tanks used in space applications face challenges due to propellant management, among which is phase change induced by a depressurization. Pool cavitation at the wall in pure methane under micro-gravity conditions is investigated, analyzing its impact on vapor creation and wall heat transfer. A compressible two-phase flow solver, including phase change and conjugate heat transfer, is used. After a validation with available experimental data for single bubble cavitation at the wall in micro-gravity, numerical simulations varying the depressurization amplitude and rate are carried out. Three distinct growth phases are put into evidence: an expansion-controlled...
Complex systems are increasingly explored through simulation-driven engineering workflows that combine physics-based and empirical models with optimization and analytics. Despite their power, these workflows face two central obstacles: (1) high computational cost, since accurate exploration requires many expensive simulator runs; and (2) limited transparency and reliability when decisions rely on opaque blackbox components. We propose a workflow that addresses both challenges by training lightweight emulators on compact designs of experiments that (i) provide fast, low-latency approximations of expensive simulators, (ii) enable rigorous uncertainty quantification, and...
