期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2012
卷号：15
期号：2
DOI：10.1088/1755-1315/15/2/022006
出版社：IOP Publishing
摘要：As the runner blades of a Francis hydroturbine pass tho ugh the wakes created fro m the wicket gates, they experience a significant change in absolute velocity, flo w angle, and pressure. The concept of adding jets to the trailing ed ge of the wicket gates is proposed as a method for reducing the dynamic load on the hydroturbine runner blades. Computational experiments show a decrease in velocity variation experienced by the runner blade with the addition of the jets. The decrease in velocity variation resulted in a 43% decrease in global torque variation at the runner passing frequency. However, an increased variation was observed at the wicket gate passing frequency. Also, a 5.7% increase in average global torque was observed with the addition of blowing from the trailing-edge of the wicket gates
