Accession Number : AD0839427

Title :   EXPERIMENTAL METHODS IN THE STUDY OF HEAT TRANSFER AT HIGH TEMPERATURE (EXPERIMENTALNI METODY STUDIA SDILENI TEPLA PRI VYSOKYCH TEPLOTACH),

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH

Personal Author(s) : Dvorak, Rudolf ; Krejci, Ludek

Report Date : 09 NOV 1967

Pagination or Media Count : 13

Abstract : A discussion of heat transfer from a dissociated subsonic gas to a wall is given. The requirements, such as the test section and instruments, which the heat source and the experimental assembly itself must meet are described. The most advantageous heat source is a plasmatron; the flow of gas emerging from the plasmatron is free of pulsations, and contamination of this flow with metal vapors from the electrodes is acceptable. In a high-temperature assembly including a plasmatron, the duration of the experiment is limited primarily by the service life of the sensing elements of the measuring instruments. The parameters of the flow can be determined by contactless methods; only the calorimetric probes which measure the enthalpy of the stream and the heat flow to the wall are subjected to the direct action of the flow. An analysis of the temperature distribution with time in the calorimetric probe is presented which permits a correct selection of the probe material for any given experiment. (Author)

Descriptors :   (*PLASMA GENERATORS, HEAT TRANSFER), HIGH TEMPERATURE, AERODYNAMIC CHARACTERISTICS, ENTHALPY, SUBSONIC FLOW, CZECHOSLOVAKIA.

Subject Categories : Plasma Physics and Magnetohydrodynamics
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE