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Numerical aspects for physically accurate Direct Numerical Simulations of turbulent jets

Sharan, Nek and Bellan, Josette R. (2019) Numerical aspects for physically accurate Direct Numerical Simulations of turbulent jets. In: AIAA Scitech 2019 Forum. American Institute of Aeronautics and Astronautics , Reston, VA, Art. No. 2019-2011. ISBN 9781624105784. https://resolver.caltech.edu/CaltechAUTHORS:20190805-134837606

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Abstract

Numerical simulations of turbulent isothermal round jets are performed at Reynolds number (based on jet diameter and jet orifice velocity) of 5000 and Mach number of 0.6 to assess influences of initial perturbation, numerical characterization, and boundary treatments on turbulence statistics. The aper documents preliminary results from an investigation eventually aimed at examining multicomponent species injection and mixing at high-pressure conditions relevant to combustion in diesel, gas-turbine and liquid-rocket engines. Lack of reliable experimental or computational results at high pressures of interest make code validation at those conditions infeasible. Therefore, single-species simulations at perfect-gas conditions are first performed to assess turbulence statistics sensitivity to numerical setup. Two cases with different inflow velocity perturbation amplitude are considered to examine influences on jet flow transition and self-similarity.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.2514/6.2019-2011DOIArticle
ORCID:
AuthorORCID
Sharan, Nek0000-0002-7274-8232
Bellan, Josette R.0000-0001-9218-7017
Additional Information:© 2019 American Institute of Aeronautics and Astronautics.
Other Numbering System:
Other Numbering System NameOther Numbering System ID
AIAA Paper2019-2011
Record Number:CaltechAUTHORS:20190805-134837606
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20190805-134837606
Official Citation:Numerical aspects for physically accurate Direct Numerical Simulations of turbulent jets Nek Sharan and Josette R. Bellan AIAA Scitech 2019 Forum. https://doi.org/10.2514/6.2019-2011
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:97646
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:09 Aug 2019 14:31
Last Modified:09 Mar 2020 13:19

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