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Combined Casing Groove and Blade Tip Treatment for Wave Energy Harvesting Turbine

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Trends in Manufacturing and Engineering Management

Part of the book series: Lecture Notes in Mechanical Engineering ((LNME))

Abstract

The Wells turbine is a self-rectifying air turbine, used in oscillating water column (OWC) to harvest wave energy. It produces unidirectional torque as the flow oscillates inside the OWC chamber. It has inherent disadvantage of narrow operating range due to stall at high airflow rate. Whereas, a wider operating range is essential to improve the turbine power output. A casing groove modifies the tip leakage flow pattern and improves the operating range. In addition, a radiused tip can alter the tip leakage flow and delay the stall. To enhance the performance further, this paper investigates the combined effect of tip groove and radiused tip (CG&RT) design modification. The flow was simulated by solving steady, incompressible Reynolds averaged Navier–Stokes equations in Ansys CFX 15.0. As expected, the CG&RT blade enhanced the relative operating range and the turbine power output by 44.4% and 23.8%, respectively.

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Author information

Authors and Affiliations

  1. Wave Energy and Fluids Engineering Laboratory, Department of Ocean Engineering, Indian Institute of Technology Madras, Chennai, 600036, India

    P. Madhan Kumar, Paresh Halder & Abdus Samad

  2. Quantum Wave Microscopy Unit, Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna-son, Okinawa, 904-0495, Japan

    Paresh Halder

Authors
  1. P. Madhan Kumar
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  2. Paresh Halder
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  3. Abdus Samad
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Corresponding author

Correspondence to Abdus Samad .

Editor information

Editors and Affiliations

  1. Sri Sivasubramaniya Nadar College of Engineering, Chennai, Tamil Nadu, India

    S. Vijayan

  2. University of Sussex, Brighton, UK

    Nachiappan Subramanian

  3. National Institute of Technology Puducherry, Puducherry, India

    K. Sankaranarayanasamy

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Madhan Kumar, P., Halder, P., Samad, A. (2021). Combined Casing Groove and Blade Tip Treatment for Wave Energy Harvesting Turbine. In: Vijayan, S., Subramanian, N., Sankaranarayanasamy, K. (eds) Trends in Manufacturing and Engineering Management. Lecture Notes in Mechanical Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-15-4745-4_89

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  • DOI: https://doi.org/10.1007/978-981-15-4745-4_89

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  • Publisher Name: Springer, Singapore

  • Print ISBN: 978-981-15-4744-7

  • Online ISBN: 978-981-15-4745-4

  • eBook Packages: EngineeringEngineering (R0)

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