Nonlinearly-corrected Large Eddy Simulation for accurately evaluating both thermal efficiency and pollutant emissions in various types of engines and reactors

R. Konagaya, K. Naitoh

Research output: Contribution to conferencePaperpeer-review

1 Citation (Scopus)

Abstract

We here propose a new nonlinear numerical method of global correction for accurately evaluating fluid-dynamic instability, thermal efficiency, and pollutant emissions in large eddy simulation and direct numerical simulation of subsonic and supersonic flows of power systems including combustion engines. Emphasis is also placed on the fact that, even though a very small amount, unrealistic non-zero density of fuel obtained by traditional computational methods with the linear correction or without any correction results in numerical errors of pollutant emissions such as hydrocarbon (HC) at order of ppm. Then, this new nonlinear method of correction also targets precise evaluation of thermal efficiency proportional to total amount of CO2 exhausted.

Original languageEnglish
Publication statusPublished - 2018
Event10th International Conference on Computational Fluid Dynamics, ICCFD 2018 - Barcelona, Spain
Duration: 2018 Jul 92018 Jul 13

Conference

Conference10th International Conference on Computational Fluid Dynamics, ICCFD 2018
CountrySpain
CityBarcelona
Period18/7/918/7/13

Keywords

  • Computational Fluid Dynamics
  • Engine
  • Gas fuel
  • Global correction
  • Jet
  • Nonlinear
  • Numerical method
  • Turbulence

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes

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