Speaker
Description
Two-Phase Mechanically Pumped Fluid Loop represents an efficient technological solution to control temperature of spacecraft equipment because:
• The heat exchange in phase change is high.
• The temperature is stable during the phase change.
• The pump allows to control on the flow and so on the heat to dissipate.
The two-phase flow of fluid loop can be modeled using 3D and 1D flow solvers, but such approaches are not scalable at system-level where the entire satellite thermal model must be represented. For this reason, space thermal analysts and engineers develop spacecraft 3D thermal models without the two-phase flow modeled explicitly to speed up simulation and perform more iteration on the design. However, estimating the heat exchange due to the phase change with accuracy is always difficult to achieve, and it requires thermal correlation between the two-phase flow model of the fluid loop and its associated simplified representation used in the 3D spacecraft thermal model. This thermal correlation procedure is iterative, manual, and time consuming for the thermal analysts.
In this paper, we will show how we can leverage the results of 1D two-phase flow simulations of a mechanically driven loop heat pipe to correlate its simplified representation, which can then be integrated into a 3D thermal model to consider the heat dissipation capacity of the loop heat pipe without modeling it explicitly. An adjoint-based approach speeds up and automates the correlation procedure. The predictions of the correlated model will be validated against the 1D two-phase flow model and reference test data. Finally, we will give some perspectives of work and future use cases of such an approach for conducting thermal correlation on spacecraft equipment.
