Accession Number : AD0465797


Title :   THE NOL 3 MW 3-PHASE A-C ARC HEATER (MARK II).


Descriptive Note : Research rept.,


Corporate Author : NAVAL ORDNANCE LAB WHITE OAK MD


Personal Author(s) : Lee, R E ; Humphrey, R L


Report Date : Jul 1965


Pagination or Media Count : 14


Abstract : An a-c arc heater developed for the NOL 3 MW research arc is described. This heater has three doughnut-shaped electrodes with internal coils to increase the magnetic field strength. The operation and performance of this design are discussed. Temperatures from 3500 to 4000 K with efficiencies from 15 to 23% were obtained at pressures from 10 to 15 atmospheres. Multiple arc streamers and the diffusion of the arc into the center of the chamber were observed. A high level of contamination of the effluent gas, an unsatisfactory magnetic design, and short component life make the design unsatisfactory. Methods of eliminating these problems are discussed. (Author)


Descriptors :   *HYPERSONIC WIND TUNNELS , HEATERS , ELECTRIC ARCS , PERFORMANCE(ENGINEERING) , ELECTRODES , MAGNETIC FIELDS , WATER , COOLING , OPERATION


Distribution Statement : APPROVED FOR PUBLIC RELEASE