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Some problems of the jet ventilation in closed spaces.

Author(s) : MAGYAR T.

Type of article: Article, IJR article

Summary

In the aerodynamic laboratory of the Department of Heating, Ventilating, Air Conditioning of the TU Budapest, some experiments on free jets have been centered around two problems. The first problem was to determine the behaviour of isotherm wall-jets. With regard to the level of the supply opening, a flow with quasi stationary velocity and turbulence rate was produced while the distances of the wall plane flanking the flow were changed. The velocity field and characteristics of the flow were measured by a hot-film anemometer (system CTA). Special attention was paid to the area before the supply opening. The second problem was connected with comfort in occupation zones ventilated by air jets. The characteristics of the flow, the socalled velocity vector, in given points of the occupation zones, its variable quantity, turbulence, intensity of eddy and the frequency of changes in velocity were observed. There was an indirect experiment to determine the role of above mentioned factors during heat flow radiated from the surface of the human body. In connection with the last problem, emphasis is laid on the characteristics of comfort parameters
to the interdisciplinary field of the two research aspects in question (free jet and comfort). It means that the air jet satisfactorily fulfilled certain parameters of air conditioning (v; t(air); t(wall)) but it was not necessarily faultless with regard to creating draughts.

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Pages: 234-238

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Details

  • Original title: Some problems of the jet ventilation in closed spaces.
  • Record ID : 30000867
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 2 - n.6
  • Publication date: 1979/11

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