GAS-SOLID FLOW THROUGH EJECTOR | ||||
| ERJ. Engineering Research Journal | ||||
| Article 6, Volume 30, Issue 1, January 2007, Page 43-51 PDF (387.98 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/erjm.2007.69895 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| N. H. Mahmoud; Mofreh H. Hamed; A. A. Abdel-Hamied; A. A. Hussien | ||||
| Mechanical Power Engineering Department, Faculty of Engineering, MinouJya University, Shebin El-kom, Egypt | ||||
| Abstract | ||||
| Single-phase (air-air) and two-phase (air-solid) flows throngh ejector are numerically and experimentally studied in this paper. The numerical model is performed using continuity equation for the gas phase and the solid phase separately, and the momentum equation for a homogenous mixture of gas-solid flow. The model takes into account the gas and solid friction with the wall and the drag force exerted on a particle by the gas. Three different geometries of the ejector are studied numerically and experimentally. The effects of the mixing chamber and tail pipeldiffuser, geometries on the ejector performance are studied. In addition, the effects of fluid motive pressure and the solid particle mass flow rate on the static pressure distribution are also studied. Comparisons are carried out between theoretical results and the present and published experimental data for the axial wall static pressure distribution. These comparisons show good agreements. The obtained results show that, geometry of convergent-constant-divergent of the mixing duct gives high vacuum pressure and preferable performance ofthe ejector. | ||||
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