Investigation of effective parameters on energy dissipation due to impinging jet in confined spaces

Document Type : Original Article

Authors

1 Department of Civil Engineering, Faculty of Engineering, Zanjan University

2 Department of Civil Engineering, Qom University,

10.22125/iwe.2022.359628.1669

Abstract

Energy dissipation due to impinging jets in a confined space is used in many industrial and civil applications. In this research, using Flow-3D software, a numerical simulation of the flow of impinging jets has been carried out. To investigate the jet's position, the inlet jet to the chamber is placed in 4 different positions. Also, the effect of the height of the inlet jet to the chamber and the diameter of the inlet pipe on the parameters of the jet velocity in the axis of the turbulent kinetic energy and the amount of energy loss has been investigated. In these simulations, the inlet jet to the waste chamber has been investigated at 4 different depths and with 4 nozzle diameters. The obtained results show that when the jet stream enters the chamber, two velocity regions of the potential core and the radial decrease of the velocity are formed. Also, energy loss increases significantly by reducing the diameter of the inlet pipe. However, by reducing the diameter of the inlet pipe too much, the chamber will not perform properly. Also, the amount of energy loss increases with the increase in the depth of the foundation. The results of investigating the position effect also showed that the highest energy loss is related to the placement of the jet tube in the tank adjacent to the outlet tube of the waste chamber.

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