EXPERIMENTAL METHODS IN THE STUDY OF HEAT TRANSFER AT HIGH TEMPERATURE (EXPERIMENTALNI METODY STUDIA SDILENI TEPLA PRI VYSOKYCH TEPLOTACH),
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 09, 1967
- Accession Number
- AD0839427
Entities
People
- Ludek Krejci
- Rudolf Dvorak
Organizations
- National Air and Space Intelligence Center