Numerical Investigation of Parameters Affecting the Thermal and Hydrodynamic Characteristics of Impinging Jets in Cross Flow

B. M. Suloiman; B. A. Jubran

doi:10.31436/iiumej.v1i1.329

Authors

B. M. Suloiman Department of Mechanical Engineering, University of Jordan, Amman-Jordan
B. A. Jubran Department of Mechanical and Industrial Engineering, Sultan Qaboos University, Al-Khod-Sultanate of Oman

DOI:

https://doi.org/10.31436/iiumej.v1i1.329

Abstract

In this investigation the hydrodynamic and the thermal fields due to a single impinging jet in cross-flow have been investigated numerically, using a 2-D axisymmetric model in order to predict the ground vortex characteristics. The parameters investigated include the effective velocity ratio, the nozzle height, the nozzle pressure ratio, the intake location, the intake mass flow rate and the jet temperature ratio. It is interesting to note that even with the 2-D modeling limitations it was possible to capture most of the thermal and fluid field characteristics of the ground vortex. It was found that the temperature distribution in the flow field is greatly affected by the effective velocity, and the maximum penetration point of the ground vortex is equal to the hot gas penetration. The ground vortex strength increases slightly with increasing the intake mass flow rate but has a minor effect on the ground vortex geometry and on the penetration of the hot gases. The intake location has a significant effect on the ground vortex strength when it is located upstream of the ground vortex core.

Key Words: Numerical investigation, Turbulence Models, Impinging jets, Cross-flow.