A series of experiments were begun January 1953 at the Gas Dynamics Facility, Arnold Engineering Development Center (GDF-AEDC) to determine, on a small scale, the nature of high-pressure heating by spark discharge.nThese experiments were conducted by discharging high-energy-level sparks in air, argon, and helium under constant volume conditions. Spark heating produced real gas air temperatures of from 1300°K (at 286 psia) to 5900°K (at 40 psia). Fifty percent efficiency of heating was computed from real gas conditions and is presented as a function of initial density. These tests show that the efficiency of heating by spark discharge is relatively high, and thus a method is available whereby high pressure air may be heated up to 5900°K.
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