Entropy Generation of Secondary Flow in a Turning Passage with Different Boundary Layer Characteristics

Yueyun Xi, Xu Peng, Hao Xia, Zhengzhong Sun, Qiang Zhang, Sergey Leonov (Editor)

Research output: Contribution to journalArticlepeer-review

13 Downloads (Pure)

Abstract

The development of secondary flow along a curved channel is a fundamental flow phenomenon occurring in a wide range of engineering applications, including turbomachinery, aerospace, heating, ventilation, air conditioning, etc. The underlying flow physics about end-wall secondary flows has been well-documented in the open literature, while the interaction between a secondary flow and a side-wall boundary layer, which is critical to the aerothermal performance of a side-wall surface, has not been comprehensively studied. In this study, the entropy generation of secondary flow and the interaction between an end-wall passage vortex and a side-wall boundary layer were numerically investigated by Reynolds-averaged Navier–Stokes (RANS) CFD for a 90° curved channel. The transportation effect of secondary flow and the generation mechanism of an induced vortex pair on the side wall is reported. It was also found that the growth of the secondary flow can be suppressed due to the displacement effect of the side-wall boundary layer. Furthermore, it was found that the interaction between a secondary flow and a side-wall boundary layer provides a suppression effect on side-wall boundary layer separation.
Original languageEnglish
Article number539
Number of pages14
JournalAerospace
Volume9
Issue number10
Early online date23 Sept 2022
DOIs
Publication statusE-pub ahead of print - 23 Sept 2022

Keywords

  • Article
  • curved channel secondary flow
  • aerodynamic loss
  • flow separation

Fingerprint

Dive into the research topics of 'Entropy Generation of Secondary Flow in a Turning Passage with Different Boundary Layer Characteristics'. Together they form a unique fingerprint.

Cite this