Comparison of Blade-Strike Modeling Results with Empirical Data

Carlson, Thomas J. ; Ploskey, Gene R.

Pacific Northwest National Laboratory (U.S.)

关键词: Probability;    Orientation;    Computerized Simulation;    Fish;    Mathematical Models;   

DOI  :  10.2172/15007840
RP-ID  :  PNNL-14603
RP-ID  :  AC06-76RL01830
RP-ID  :  15007840

美国|英语

来源: UNT Digital Library

【 摘 要 】

This study is the initial stage of further investigation into the dynamics of injury to fish during passage through a turbine runner. As part of the study, Pacific Northwest National Laboratory (PNNL) estimated the probability of blade strike, and associated injury, as a function of fish length and turbine operating geometry at two adjacent turbines in Powerhouse 1 of Bonneville Dam. Units 5 and 6 had identical intakes, stay vanes, wicket gates, and draft tubes, but Unit 6 had a new runner and curved discharge ring to minimize gaps between the runner hub and blades and between the blade tips and discharge ring. We used a mathematical model to predict blade strike associated with two Kaplan turbines and compared results with empirical data from biological tests conducted in 1999 and 2000. Blade-strike models take into consideration the geometry of the turbine blades and discharges as well as fish length, orientation, and distribution along the runner.