Design optimization of a vaneless "fish-friendly" swirl injector for small water turbines

[+] Author and Article Information
Ajith Airody

Mechanical and Mechatronics Engineering University of Waterloo 200 University Ave. W. Waterloo, Ontario N2L 3G1 Canada

David de Montmorency

AlfaStar Hydro Kitchener, Ontario N2R 1J4 Canada

Sean D. Peterson

Mechanical and Mechatronics Engineering University of Waterloo 200 University Ave. W. Waterloo, Ontario N2L 3G1 Canada

1Corresponding author.

ASME doi:10.1115/1.4036667 History: Received February 03, 2016; Revised April 06, 2017


Large-scale power generation and delivery to remote locales is often expensive and can have deleterious effects on the local ecosystem. With smaller environmental footprints, small-scale run-of-river hydroelectric facilities that are capable of generating power from the modest head provided by streams and rivers are attractive alternatives. Concern remains, however, for the health and safety of the local fish population in these water ways. In order to reduce the impact of small-scale axial turbine-based hydroelectric facilities on the local fauna, AlfaStar Hydro has proposed a vaneless swirl injector to replace traditional turbine inlet guide vanes. Herein we perform a numerical study of the flow development in the vaneless swirl injector as a function of the number of revolutions and the pitch angle of the rifling in the absence of a rotor towards maximizing turbine efficiency. Swirl intensity, pressure loss in the injector, and axial and circumferential velocity distributions are incorporated as performance metrics into an objective function in order to optimize the casing design. Results indicate that the number of revolutions of the injector has considerably less influence on overall performance than does pitch angle. The casing with the best predicted performance consists of 4 revolutions at a pitch angle of 25 degrees.

Copyright (c) 2017 by ASME
Your Session has timed out. Please sign back in to continue.






Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In