Airflow tests were conducted in the ECS laboratory to characterize the flow of the
projector and the PC that were enclosed in the shroud assembly. From the airflow test
results and from the mechanical CAD data provided by the client, a CFD model was
developed. From the baseline CFD model, it was found that the shroud caused much of
the exhaust air to return to the inlet of the projector. This re-circulation likely caused the
projector to shut down. Several scenarios were evaluated to identify the best ways to
eliminate or reduce the re-circulation. The constraints involved were the limited areas on
the shroud panels where vents can be placed to allow for advertising space, and the
need to limit line-of-sight to the equipment within the shroud from the public.
Recommendations were given to improve the shroud design based on the scenario that
gave the best results and met the constraints.