Laminar-turbulent transition modeling with a reynolds stress model for anisotropic flow characteristics

Shunya Endo, Thanakorn Sujisakulvong, Yuichi Kuya, Taketo Ariki, Keisuke Sawada

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

Abstract

This study designs a new RANS transition model by integrating an existing one-equation transition model (γ transition model) and Reynolds stress model (SSG/LRR-ω RSM). The objective of this study is twofold: 1) to propose a RANS transition model which can predict three-dimensional flow features including crossflow instabilities more accurately, compared to existing typical RANS approaches, and 2) to provide a good benchmark model by integrating reliable existing models for the future developments of RANS methods. To blend the γ transition model and SSG/LRR-ω RSM, a simple blending function is suggested here for the ω source term. Some numerical tests are conducted, including a zero-pressure-gradient flat plate, a two-dimensional single-element airfoil, a two-dimensional multi-element airfoil (30P30N), and a three-dimensional prolate-spheroid. The γ-SSG/LRR-ω RSM proposed in this study demonstrates better predictions in the numerical tests, compared to the γ-k-ω SST model and non-transition models. However, both the γ-SSG/LRR-ω RSM and γ-k-ω SST model predict different transition characteristics to the experimental results in the three-dimensional prolate-spheroid test. This might be because the transition induced by crossflow instabilities is not considered in the transition models tested in this paper, and therefore further modifications will be discussed in the presentation.

Original languageEnglish
Title of host publicationAIAA Scitech 2020 Forum
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
Pages1-15
Number of pages15
ISBN (Print)9781624105951
DOIs
Publication statusPublished - 2020
EventAIAA Scitech Forum, 2020 - Orlando, United States
Duration: 2020 Jan 62020 Jan 10

Publication series

NameAIAA Scitech 2020 Forum
Volume1 PartF

Conference

ConferenceAIAA Scitech Forum, 2020
CountryUnited States
CityOrlando
Period20/1/620/1/10

ASJC Scopus subject areas

  • Aerospace Engineering

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