EXPLORATORY DEVELOPMENT OF HIGH-TEMPERATURE HEAT EXCHANGERS.

The objective of this program is to establish and verify design concepts for heat exchangers that process air at temperatures that are considerably in excess of the melting points of conventional, or practical, heat exchanger materials. All design and fabrication associated with the program will be based on the use of uncoated L-605, operating at a maximum metal temperature of 1800 F. The approach being used in the program involves 1 definition and layout of a reference design using the operating requirements for a fullscale heat exchanger, 2 experimental verification of the structural, manufacturing, and performance features of this design, and 3 design, fabrication, and testing of a small-scale heat exchanger that incorporates the characteristic features of the reference design. This report represents the work accomplished in 1 fabrication of the test heat exchanger components, 2 test heat exchanger design, and 3 test planning. The coolant header insert design and coolant pressure drop summary are included. Included is the performance of the test heat exchanger with air substituted for hydrogen as the coolant. The fabrication of the test heat exchanger components is discussed. Author