On the thermal, dynamic and turbulent development of the heated confined jet
Abstract
The mean flow and temperature fields as well as the turbulence intensity field of a turbulent heated confined jet were studied experimentally using a specially-designed apparatus for generating flows. On the basis of the experimental data, the turbulent flow field and heat transfer of a confined jet were predicted using a numerical procedure based on the solution of the finite-difference form of the governing conservation equations together with the two-equation k-epsilon turbulence model. The results indicate that the turbulence transport is more intense than the heat transfer and the latter is more intense than the momentum transfer in the cases of shear flow configurations. The combined effects of a thick nozzle lip and a fully developed jet flow cause faster development of a confined heated jet than in the case of a sharp lip and a uniform jet velocity profile. The k-epsilon turbulence model was able to predict developments of confined heated jets, but the prediction method was less successful in cases with backflow and for high values of Reynolds number.
- Publication:
-
Heat transfer 1986; Proceedings of the Eighth International Conference
- Pub Date:
- 1986
- Bibcode:
- 1986hetr.conf.1159I
- Keywords:
-
- Flow Distribution;
- Jet Flow;
- Nozzle Flow;
- Turbulent Flow;
- Turbulent Heat Transfer;
- Coaxial Flow;
- Hot-Wire Anemometers;
- K-Epsilon Turbulence Model;
- Reynolds Number;
- Temperature Distribution;
- Fluid Mechanics and Heat Transfer