An Experimental Study on The Effect of Permeable Slot Width on The Performance of Two - Dimensional Diffuser

كاطع, وسام عبد

doi:10.30684/etj.28.9.18

	An Experimental Study on The Effect of Permeable Slot Width on The Performance of Two - Dimensional Diffuser
Engineering and Technology Journal
Article 1, Volume 28, Issue 9, 2010, Pages 454-466 PDF (268.87 K)
DOI: 10.30684/etj.28.9.18
Author
وسام عبد كاطع
Abstract
The present study deals with incompressible turbulent flow. The flow regarded as fully developed in two-dimensional diffuser. For completion of this study a number of test models of modified diffusers designed and manufactured with a six modified diffuser models were designed and manufactured with (3, 4 mm) permeable slot and each with (10◦ ,15◦ , 20◦) divergent angle . The air was used as working fluid during the experimental Program at different Reynolds numbers ranging between (6.85 × 104) to (1.64 × 105) at the duct inlet. The results obtained showed that location of separation delayed by decreasing the divergent angle and increasing the Reynolds number. The static pressure coefficient recovery increased with the decreasing the diffuser area ratio (AR).Also, the width of the permeable slot (4mm) in the modified diffuser at divergent angles (10◦,15◦,20◦), enhances the static pressure coefficient recovery (Cp) over the case of permeable slot of (3mm) with (23.25%),( 27.33%), and (33.61%), respectively, and for the case of permeable slot of (2mm) with (29.22%), (34.74%) and (40.88%), respectively, and with the case of no permeable slot with (410.13%) , (44.09%), and (51.01%), respectively.

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