J. Langley, M. Taylor, G. Wagner, and S. Morris, “Thermoelectric Energy Harvesting from Small Aircraft Engines,” SAE International, 2009.
I haven't found a free source for the paper yet but it may be of interest.
Thermoelectric Generator Development for Automotive Waste Heat Recovery
This one is right up our alley.
https://www.energy.gov/sites/prod/fi...10_meisner.pdf