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Optimization study on the downstream section of a radial inflow turbine

Citation

Ansarifard, N and Fleming, A and Henderson, A and Kianejad, SS and Chai, S, Optimization study on the downstream section of a radial inflow turbine, AWTEC 2018 Proceedings, 9-13 September 2018, Taipei, Taiwan, pp. 311. (2018) [Refereed Conference Paper]


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Abstract

The 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.

Item Details

Item Type:Refereed Conference Paper
Keywords:air turbines, oscillating water column, design optimization
Research Division:Engineering
Research Group:Maritime Engineering
Research Field:Marine Engineering
Objective Division:Environment
Objective Group:Other Environment
Objective Field:Marine Oceanic Processes (excl. climate related)
Author:Ansarifard, N (Ms Nazanin Ansarifard)
Author:Fleming, A (Dr Alan Fleming)
Author:Henderson, A (Dr Alan Henderson)
Author:Kianejad, SS (Mr Seyedsadreddin Kianejadtejenaki)
Author:Chai, S (Associate Professor Shuhong Chai)
ID Code:128704
Year Published:2018
Deposited By:NC Maritime Engineering and Hydrodynamics
Deposited On:2018-10-08
Last Modified:2018-10-10
Downloads:0

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