Accession Number : ADA017584

Title :   Investigation of a High Enthalpy Air Arc Heater.

Descriptive Note : Final rept. 1 Nov 73-31 May 75,


Personal Author(s) : Kang,S. F. ; Fink,J. ; Sheer,C.

Report Date : AUG 1975

Pagination or Media Count : 67

Abstract : An experimental program was undertaken to develop a high enthalpy arc heater using air as the working fluid. Structurally the heater consists of a fluid convection cathode (FCC) and a ring anode. The FCC consists of a conical tungsten cathode surrounded by a concentric, closely-spaced shroud to form a annular nozzle to inject part of the working fluid into the base of the arc column. The ring anode features a central aperture, serving as the arc anode, and annular nozzle to inject the remainder of the working fluid into the column near the anode end of the arc. Both cathode and anode gas flows provide some gas-film cooling of the respective electrodes. A parametric study was made of the heater operation by varying arc current, gas flowrates and various geometrical factors using successively argon, nitrogen and finally air, as the working fluid.

Descriptors :   *Electric heaters, Electric arcs, Enthalpy, Gas flow, Convection, Air, Argon, Nitrogen

Subject Categories : Air Condition, Heating, Lighting & Ventilating
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE