Heat Rejection at Low Air Density for Very High Altitude Aircraft

Period of Performance: 02/12/2009 - 03/20/2010


Phase 1 SBIR

Recipient Firm

Enig Assoc., Inc.
4600 East West Hwy Array
Bethesda, MD 20814
Principal Investigator


High altitudes both make heat rejection difficult and impose power plant constraints that add significant waste heat to be rejected. The result is a challenging transport problem we can most effectively attack by making use of the longer mean free paths at stratospheric altitudes and the short length scales of particular multiphase ceramic materials to enhance electrically the natural heat convection processes. The initial survey will identify and attempt (i) to optimize the physical dimensions of these devices relative to typical boundary layers and accommodation lengths, and (ii) to establish the electrical operating points, duty cycle, and dynamic ranges.