One-Dimensional Modelling and Analysis of Thermal Barrier Coatings for Reduction of Cooling Loads in Military Vehicles

Paper #:
  • 2018-01-1112

Published:
  • 2018-04-03
Abstract:
The US ARMY TARDEC is seeking to reduce cooling loads in military vehicles, and to that end thermal barrier coatings (TBCs) are being studied for their potential as insulators in military engines. The effectiveness of TBCs is largely dependent on their thermal properties, though insulating effects can also be modified by applying different coatings in layers or using different coating thickness. In order to determine what will provide the greatest benefit to TARDEC a 1D model was developed which is capable of providing insight into the effects of different TBC design and material selection. Though models have been developed using full 3D CFD architecture for examining the effects of these coatings, this model is capable of screening multiple cases in the time it would take a full model to complete a single cycle and as such is a very useful tool for providing results in short order. A comparison of the model results to experimental measurements from other authors suggests it is a reliable tool for TBC property screening, and can eliminate wasted cost and time from experimentally testing non-viable coating designs. Results from the model identify thermal conductivity and diffusivity as key parameters in achieving optimal heat loss reduction. They also indicate that there is a linear relationship between the reduction of cooling load and the thickness of the coating.
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