ENGINEERING ANALYSIS AND DESIGN CALCULATIONS OF NASA – LENGLEY RESEARCH CENTER HYDROGEN-AIR-VITIATED HEATER WITH OXYGEN REPLENISHMENT

摘要

This report presents the technical basis for the design of the Hydrogen-Air-Vitiated Heater. The heater liner is;subjected to a maximum thermal environment at specified condition z (Figure 1-1), where the combustion gas temperature, pressure and flow rate are 5000 F, 750 psia, and 11.0 lb/sec, respectively, 2 and results in a heat flux of the order of 275 BTU/scc-ft. Cooling and stress analyses indicate that water is the logical choice for cooling of the combustor liner. A cylindrical shell of zirconium copper was selected as the combustor liner. This material, a high copper alloy, was chosen primarily because of 2 its high thermal conductivity (k = 200 BTU/hr-ft ) as well as good yield strength (35,000 psi) in a forged condition. Additionally by using water cooled liner there is built into the design, potential for future extensions to more severe thermal environments beyond the present specification envelope.