Analysis of Improved Combustion Characteristics and NOx Emission of an SI-HCNG Engine

2012-01-0874

04/16/2012

Event
SAE 2012 World Congress & Exhibition
Authors Abstract
Content
The purpose of this study is to analyze the performance of a spark ignition (SI)-HCNG (Hydrogen Compressed Natural Gas) engine by KIVA-3V. Turbulent premixed combustion is modeled by an independent transport equation for the mean reaction progress variable. The turbulent burning velocity is given by a phenomenological correlation in terms of laminar flame speed and turbulent intensity. The resulting flame speeds are validated against measured data in literature with parametric variation of turbulent intensity and H₂ fraction. Results showed good agreement with measured efficiencies and NOx emissions for varying air/fuel ratios and hydrogen fractions in CNG fuel. It is shown possible to satisfy the target of improved efficiency and reduced NOx of the test SI-HCNG engine due to enhanced lean flammability limits of CNG premixture with hydrogen.
Meta TagsDetails
DOI
https://doi.org/10.4271/2012-01-0874
Pages
11
Citation
Yoo, H., Lee, D., and Huh, K., "Analysis of Improved Combustion Characteristics and NOx Emission of an SI-HCNG Engine," SAE Technical Paper 2012-01-0874, 2012, https://doi.org/10.4271/2012-01-0874.
Additional Details
Publisher
Published
Apr 16, 2012
Product Code
2012-01-0874
Content Type
Technical Paper
Language
English