full paper-26-04-2018.pdf (740.93 kB)
Optimization study on the downstream section of a radial inflow turbine
conference contribution
posted on 2023-05-23, 13:44 authored by Ansarifard, N, Alan FlemingAlan Fleming, Alan HendersonAlan Henderson, Kianejad, SS, Shuhong ChaiShuhong ChaiThe Oscillating Water Column (OWC) is a form of Wave Energy Converter (WEC) plant that is employed to harness the power of ocean waves. UniWave is a vented OWC type that extracts the pneumatic power solely from negative pressure drops in the chamber. Having a different flow profile compared to the conventional OWCs, there is a need for customizing a turbine design for the typical UniWave operation. The design modification of the downstream section in a radial inflow turbine has been considered for efficiency improvements. Being the linking element between the turbine and the chamber, this section has potentials for significant impact on the turbine-chamber flow interaction. Four parameters are selected which mainly affect the shapes of the downstream guide vanes and the duct, and optimization methods are employed for efficiency maximization. Guide vane curvature, radius of the duct and use of a diffuser were shown to affect the efficiency and the downstream losses. An improved downstream section in a turbine-duct geometry can improve the turbine’s peak efficiency by 14%, due to decreasing the pressure losses at the rotor downstream.
History
Publication title
AWTEC 2018 ProceedingsPagination
311Department/School
Australian Maritime CollegePublisher
National Taiwan Ocean UniversityPlace of publication
TaiwanEvent title
The 4th Asian Wave and Tidal Energy Conference (AWTEC 2018)Event Venue
Taipei, TaiwanDate of Event (Start Date)
2018-09-09Date of Event (End Date)
2018-09-13Rights statement
Copyright 2018 the authorsRepository Status
- Open