0
research-article

DESIGN METHODOLOGY FOR SUPERSONIC RADIAL VANES OPERATING IN NON-IDEAL FLOW CONDITIONS

[+] Author and Article Information
Nitish Anand

PhD Candidate, Propulsion & Power, Aerospace Engineering, Delft University of Technology, Delft, The Netherlands
n.anand@tudelft.nl

Salvatore Vitale

PhD Candidate, Propulsion & Power, Aerospace Engineering, Delft University of Technology, Delft, The Netherlands
s.vitale@tudelft.nl

Matteo Pini

Assistant Professor, Propulsion & Power, Aerospace Engineering, Delft University of Technology, Delft, The Netherlands
m.pini@tudelft.nl

Gustavo J. Otero-Rodríguez

PhD Candidate, Process and Energy Department, Mechanical Engineering, Delft University of Technology, Delft, The Netherlands
g.j.oterorodriguez@tudelft.nl

Rene Pecnik

Associate Professor, Process and Energy Department, Mechanical Engineering, Delft University of Technology, Delft, The Netherlands
r.pecnik@tudelft.nl

1Corresponding author.

ASME doi:10.1115/1.4040182 History: Received August 21, 2017; Revised April 17, 2018

Abstract

The stator vane of high-temperature Organic Rankine Cycle radial-inflow turbines operates under severe expansion ratios and the associated fluid-dynamic losses account for nearly two-third of the total losses generated inside the machine. The efficiency of the machine can strongly benefit from specialized high-fidelity design methods able to provide shapes attenuating shock wave formation. Shape optimization is certainly a viable option to deal with supersonic ORC stator design, but it is computationally expensive and often case specific. In this work, a robust method to approach the problem in a more systematic manner is documented. The methodology involves an optimization procedure encompassing the method of characteristics extended to non-ideal fluid flow for profiling the diverging part of the nozzle. The subsonic section and semi-bladed suction side are retrieved using a simple conformal geometrical transformation. The method is applied to the design a supersonic ORC stator working with Toluene vapors, for which two blade shapes were already available. The comparison of fluid-dynamic performance clearly indicates that the MoC-Based method is able to provide the best results with the lowest computational effort, and is suitable to be used to draw general design guidelines.

Copyright (c) 2018 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Tables

Errata

Discussions

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