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 S-shaped 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 energy-loss 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°).
Ibrahim, K. A., El-Askary, W. A., Sakr, I. M., & Omara, H. A. (2015). EXPERIMENTAL AND NUMERICAL STUDIES ON WATER FLOW THROUGH RECTANGULAR CROSS-SECTIONAL AREA S-SHAPED DIFFUSERS. ERJ. Engineering Research Journal, 38(4), 309-325. doi: 10.21608/erjm.2015.66853
MLA
K. A Ibrahim; W. A El-Askary; I. M Sakr; Hamdy A Omara. "EXPERIMENTAL AND NUMERICAL STUDIES ON WATER FLOW THROUGH RECTANGULAR CROSS-SECTIONAL AREA S-SHAPED DIFFUSERS". ERJ. Engineering Research Journal, 38, 4, 2015, 309-325. doi: 10.21608/erjm.2015.66853
HARVARD
Ibrahim, K. A., El-Askary, W. A., Sakr, I. M., Omara, H. A. (2015). 'EXPERIMENTAL AND NUMERICAL STUDIES ON WATER FLOW THROUGH RECTANGULAR CROSS-SECTIONAL AREA S-SHAPED DIFFUSERS', ERJ. Engineering Research Journal, 38(4), pp. 309-325. doi: 10.21608/erjm.2015.66853
VANCOUVER
Ibrahim, K. A., El-Askary, W. A., Sakr, I. M., Omara, H. A. EXPERIMENTAL AND NUMERICAL STUDIES ON WATER FLOW THROUGH RECTANGULAR CROSS-SECTIONAL AREA S-SHAPED DIFFUSERS. ERJ. Engineering Research Journal, 2015; 38(4): 309-325. doi: 10.21608/erjm.2015.66853
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