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Effect of anti-vortex plates on critical submergence at a vertical intake
, Article Scientia Iranica ; Volume 17, Issue 2 A , 2010 , Pages 89-95 ; 10263098 (ISSN) ; Kabiri Samani, A. R ; Sharif University of Technology
2010
Abstract
One of the sources of disturbance at intakes is the occurrence of free-surface vortices with an air core. The most common solution for avoiding air-entrainment is the use of anti-vortex devices and, especially, plates for large pipe or shaft intakes. If plates are used, then, the geometry and position of them should be studied experimentally. Since only general guidance for use of plates is available, a study for the more precise placement of plates is needed. Hence, a comprehensive set of experiments have been carried out using rectangular plates with different dimensions and at various positions with respect to the vertical outlet pipe intakes and two different pipe diameters (D = 75 and...
Oblique weir equation using incomplete self-similarity
, Article Canadian Journal of Civil Engineering ; Volume 33, Issue 10 , 2006 , Pages 1241-1250 ; 03151468 (ISSN) ; Kabiri Samani, A. R ; Nekoee, N ; Sharif University of Technology
2006
Abstract
Incomplete self-similarity (ISS) concept is employed to develop the equations from existing experimental results of flow over an oblique rectangular sharp-crested weir for both free and submerged flow. The stage-discharge relationship is obtained by theoretical analysis, based on the application of the dimensional analysis and the ISS theory. For analysis, the relations were found by trial and error procedure using the SPSS mathematical computer program that estimates the relation among multi-variable functions. Thus, equations to estimate the flow characteristics for both free and submerged flow are proposed. The results show a better compatibility with the experimental data than the...