IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
Log On
About IAHRDirectoryCommitteesMy IAHRNews & JournalseLibraryeShopEventsJoin IAHRWorld CongressDonate
spacer.gif
spacer.gif eLibrary
spacer.gif eLibrary
You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) FULL PAPERS : THEME 8- SPECIAL SESSIONS : EVALUATION OF CRITICAL SUBMERGENCE FOR HORIZONTAL INTAKES
EVALUATION OF CRITICAL SUBMERGENCE FOR HORIZONTAL INTAKES
Author : YASER SHEIKHI , BABAK LASHKAR-ARA
Horizontal intakes are one of the most important parts of hydraulic sets such as river for irrigation or reservoir for power generation and industrial purposes. Air entrainment by means of a free air-core vortex occurring at intake pipes is an important problem encountered in hydraulic engineering. Formation of the vortices in front of intake is the result of complex interaction between many parameters and cause operational problems for turbine or pump and reduction of coefficient of discharge. In this study, the equations for estimating critical submergence are developed using experimental data. The results are compared with critical spherical sink surface (CSSS) presented by Yilderim method, Gurbuzdal model and artificial neural network (ANN). According to the results, the neural network is more accurate than previous models proposed by researchers and equation presented in this study, but there is a better agreement between the presented equation and experimental data than CSSS I, CSSS II and equation presented by Gurbuzdal. Therefore, the presented equation as a simple and the precise equation is 2 recommended to estimate the critical submergence. In this equation, the value of RMSE and are 0.283 and 0.826 R respectively.
File Size : 861,195 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) FULL PAPERS
Article : THEME 8- SPECIAL SESSIONS
Date Published : 20/04/2016
Download Now