Aerodynamic design optimization of a variable geometry nozzle vane for automotive turbochargers

Lee Galloway, Sung In Kim, Jongyoon Park, Seong Kwon, Sejong Yoo

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

An aerodynamic design optimization study of the nozzle vane of a variable geometry turbine (VGT) turbocharger for a diesel engine application was conducted using the commercial software, ANSYS CFX and DesignXplorer. The nozzle design was optimized at three critical engine operating points. The nozzle shape was parameterized using key design parameters including theta angle, thickness value and opening angle. For a good balance of computational time and accuracy, the optimization approach adopted meta-models and response surfaces to represent the training data and reduce the number of simulations required to reach an optimal design. 

Finally, more than 300 optimized designs were simulated to assess the performance and characteristics of each design. The final optimized nozzle design met all the design constraints and showed an improvement of up to 2% efficiency and reduced the maximum torque by 20% compared to the baseline nozzle.

Original languageEnglish
Title of host publicationASME Turbo Expo 2021: Turbomachinery Technical Conference and Exposition
Subtitle of host publicationTurbomachinery - Design Methods and CFD Modeling for Turbomachinery; Ducts, Noise, and Component Interactions
PublisherThe American Society of Mechanical Engineers (ASME)
Number of pages10
Volume2C
ISBN (Electronic)9780791884928
DOIs
Publication statusPublished - 16 Sep 2021
EventASME Turbo Expo 2021: Turbomachinery Technical Conference and Exposition, GT 2021 - Virtual, Online
Duration: 07 Jun 202111 Jun 2021

Publication series

NameProceedings of the ASME Turbo Expo
Volume2C-2021

Conference

ConferenceASME Turbo Expo 2021: Turbomachinery Technical Conference and Exposition, GT 2021
CityVirtual, Online
Period07/06/202111/06/2021

Bibliographical note

Funding Information:
This research was funded by KeyYang Precision Co., which is gratefully acknowledged. The authors would like to thank ANSYS Inc. for the use of their software in this research.

Publisher Copyright:
© 2021 American Society of Mechanical Engineers (ASME). All rights reserved.

Keywords

  • Aerodynamic optimization
  • CFD
  • Nozzle vane
  • Radial turbine
  • Turbocharger
  • VGT

ASJC Scopus subject areas

  • Engineering(all)

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