STUDY OF TURBULENT FLOW IN RECTANGULAR CHANNEL WITH INCLINED BAFFLES | ||||
| ERJ. Engineering Research Journal | ||||
| Article 3, Volume 32, Issue 2, April 2009, Page 131-143 PDF (1.26 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/erjm.2009.69434 | ||||
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| Authors | ||||
| M. Nasr; A. Abdel- fattah; W. A. El-Askary | ||||
| Mechanical Power Engineering Department, Faculty of Engineering, Menoufiya University Shebin EA-Kom, EGYPT | ||||
| Abstract | ||||
| Experimental and numerical studies investigate the pressure recovery coefficient along the wall of a rectangular channel fitted by inclined-perforated and solid baffles. Two baffles of same overall size are used in the experiment. The upstream baffle is attached to the top surface, while the position, orientation, and the shape of the other baffle are varied. Different inflow Reynolds number for this study is tested and ranged between 71,000 and 122,500. Experimental results show that the pressure recovery distribution is strongly depended on the position, orientation, and geometry of the second baffle plate. The pressure drop goes down with an increase in the Reynolds number, but its value depends on the arrangement of baffles. The pressure drop is much higher for two inclined baffles (one perforated on the upper wall and one solid on the lower wall). For the sake of numerical simulation, the turbulent governing equations are solved by a control volume-based finite difference method and using the standard as well as the RNG k- E turbulence model associated with wall function to describe the turbulent structure. A modification includimg the effect of streamline curvature is considered in the turbulence model. The velocity and pressure terms of momentum equations are solved by SIMPLE (semi-implicit method for pressure-lied equation) method. Satisfied comparisons are achieved to verify the turbulence model used. The results show that the wall pressure recovery coefficient is strongly affected by the geometry and location of baffles in the duct. Also, the comparisons of the numerical results given by using turbulence models indicate the quality of the k - E including the streamline curvature in the turbulence model | ||||
| Keywords | ||||
| Rectangular channel flow; Baffle; Inclined baffle; Pressure drop | ||||
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