ALTITUDE-TEST-CHAMBER INVESTIGATION OF PERFORMANCE OF A 28-INCH RAM-JET ENGINE Ⅳ – EFFECT OF INLET-AIR TEMPERATURE, COMBUSTION-CHAMBER-INLET-MACH NUMBER, AND FUEL VOLATILITY ON COMBUSTION PERFORMANCE

摘要

As part of a direct-connect altitude-test-chamber investigation of the combustion performance of a 28-inch-diameter ram-jet engine conducted at the NACA Lewis laboratory, the effects of the following variables on combustion performance were determined:n1. Inlet-air temperature (150° to 350° F)n2. Combustion-chamber-inlet Mach number and pressure (values associated with 55 and 65-percent exhaust nozzles)n3. Fuel density and volatility (commercial grade normal heptanes and high-speed Diesel fuel).