Thermal Design of Attendant Control Panel for Avionics through CFD

摘要

Attendant Control Panel (ACP) is a wall mounted unit which mainly integrates several Boeing 737NG system functions into a single control panel to provide the flight attendants with the ability to monitor and control cabin features. Thermal design has been developed to remove heat from the ACP through conduction and natural convection. Standoffs in the enclosure provided the effective conduction path to transfer heat from PWA (Printed Wire Assembly) to chassis. All critical device temperatures in the ACP are able to maintain well below the allowable temperature limit of 105oC without forced cooling. CFD(Computational Fluid Dynamics) simulations have been carried to analyze and improve thermal phenomena inside the ACP for three operating conditions namely normal operating (30oC), high operating (50oC) and short range operating (50oC to 60oC for 30 min) , using ANSYS Icepack, commercial CFD software. The thermal design of ACP is developed in this paper to maintain its operating temperature within the limits, without any electrical degradation.