Performance of S-Shaped Diffusers: Experimental and Numerical Studies
Sakr, I., El-Askary, W., Ibrahim, K., Omara, H. (2017). Performance of S-Shaped Diffusers: Experimental and Numerical Studies. EKB Journal Management System, 17(AEROSPACE SCIENCES & AVIATION TECHNOLOGY, ASAT - 17 – April 11 - 13, 2017), 1-20. doi: 10.21608/asat.2017.22473
I. M. Sakr; W. A. El-Askary; K. A. Ibrahim; Hamdy A. Omara. "Performance of S-Shaped Diffusers: Experimental and Numerical Studies". EKB Journal Management System, 17, AEROSPACE SCIENCES & AVIATION TECHNOLOGY, ASAT - 17 – April 11 - 13, 2017, 2017, 1-20. doi: 10.21608/asat.2017.22473
Sakr, I., El-Askary, W., Ibrahim, K., Omara, H. (2017). 'Performance of S-Shaped Diffusers: Experimental and Numerical Studies', EKB Journal Management System, 17(AEROSPACE SCIENCES & AVIATION TECHNOLOGY, ASAT - 17 – April 11 - 13, 2017), pp. 1-20. doi: 10.21608/asat.2017.22473
Sakr, I., El-Askary, W., Ibrahim, K., Omara, H. Performance of S-Shaped Diffusers: Experimental and Numerical Studies. EKB Journal Management System, 2017; 17(AEROSPACE SCIENCES & AVIATION TECHNOLOGY, ASAT - 17 – April 11 - 13, 2017): 1-20. doi: 10.21608/asat.2017.22473

Performance of S-Shaped Diffusers: Experimental and Numerical Studies

International Conference on Aerospace Sciences and Aviation Technology
Article 41, Volume 17, AEROSPACE SCIENCES & AVIATION TECHNOLOGY, ASAT - 17 – April 11 - 13, 2017, April 2017, Page 1-20  XML PDF (1.23 MB)
Document Type: Original Article
DOI: 10.21608/asat.2017.22473
View on SCiNiTO View on SCiNiTO
Authors
I. M. Sakr1; W. A. El-Askary2; K. A. Ibrahim2; Hamdy A. Omara3
1Lecturer, Faculty of Eng., Menoufia Univrsity. Shebin El-kom-Egypt.
2Professor, Faculty of Eng., Menoufia University, Shebin El-Kom- Egypt.
3Ass. lecturer, El-Arish Higher Institute of Eng., Egypt.
Abstract
The paper presents comprehensive experimental and numerical studies on water flow through rectangular S-shaped diffusers. The experimental setup was designed and constructed to perform the measurements which have been carried out on twelve models of Sshaped diffusers. The measurements of pressure distributions along the outer and inner walls
of the S-shaped diffuser were performed for different parameters including area ratios, curvature ratios, inflow Reynolds numbers, turning angles (45/45, 60/60, 90/90), and flow paths (45/45, 60/30, 30/60). The energy-loss coefficients for each model are based on detailed measurements of the wall pressure distributions along walls of the S-shaped - diffuser models including long upstream and downstream tangents. The energy-loss coefficient data were plotted as a function of Reynolds number for the tested models at different geometrical parameters. The experimental data for different S-diffuser configurations have been used for assessing credibility of the numerical code using different turbulence models. High performances of computations with turbulence closure provided by the standard k-ε model have been carried out for prediction of the performance of S-diffusers at different inflow and geometrical conditions. The results showed that the diffuser energyloss coefficient is strongly affected by the geometrical parameters of S-shaped diffuser and inflow Reynolds number. Increasing area ratio, curvature ratio, and inflow Reynolds number increase the diffuser performance. The turning angle plays an important role in improving the S-shaped diffuser performance. But, the diffuser performance decreases, when the turning angle is larger than 60° and the flow path changes far than the symmetric path (45°/45°).
Keywords
Water flow; Diffuser performance; Turn angle; Energy losses; S-Shaped diffusers
Statistics
Article View: 139
PDF Download: 503