Comparative aerodynamic assessment of a multistage centrifugal compressor return channel based on rans and les

Haosen H.A. Xu, Xiang I.A. Yang, Vishal Jariwala, Louis Larosiliere

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

1 Scopus citations

Abstract

We report LES and RANS results of the flow in a return channel. Given the same inflow, the LESs and RANS lead to qualitatively similar but quantitatively different results up to the trailing edge of the deswirl vane and qualitatively different results from the trailing edge to the exit of the return channel. The RANS leads to strong vortical structures downstream of the deswirl guide vane. While these vortical motions are found in the LESs, they are much weaker. As a result, the RANS predicts larger variations of the swirl angle, the azimuthal velocity, and the total pressure in the span direction at the exit of the return channel than the LESs. In addition to LES and RANS in their conventional sense, we also conduct an LES on a RANS grid. By comparing the RANS-grid LES results and the LES results, we show that an LES-quality grid is an essential part of an LES.

Original languageEnglish (US)
Title of host publicationAIAA Scitech 2021 Forum
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
Pages1-12
Number of pages12
ISBN (Print)9781624106095
DOIs
StatePublished - 2021
EventAIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2021 - Virtual, Online
Duration: Jan 11 2021Jan 15 2021

Publication series

NameAIAA Scitech 2021 Forum

Conference

ConferenceAIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2021
CityVirtual, Online
Period1/11/211/15/21

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering

Fingerprint

Dive into the research topics of 'Comparative aerodynamic assessment of a multistage centrifugal compressor return channel based on rans and les'. Together they form a unique fingerprint.

Cite this