Modelling Diesel Engine Natural Gas Injection: Injector/Cylinder Boundary Conditions

Paper #:
  • 940329

Published:
  • 1994-03-01
Citation:
Zhang, J., Fraser, R., and Strong, A., "Modelling Diesel Engine Natural Gas Injection: Injector/Cylinder Boundary Conditions," SAE Technical Paper 940329, 1994, https://doi.org/10.4271/940329.
Pages:
16
Abstract:
Direct injected natural gas diesel engines are currently being developed. Numerical analyses results are presented for 20.0 MPa (≈ 3000 psia; 200 atm), 444 K, natural gas injection into 4.0 MPa cylinder air where the ambient turbulence field is representative of diesel engines. Two very important non-intuitive, observations are made. First, the seemingly reasonable spatially uniform velocity profile currently used at the injector exit is not appropriate, rather a double-hump profile is correct. Second, a spatially uniform, injector exit, temperature profile results in local temperature overestimates as large as 300 K. Considering the strong role of temperature on chemical kinetics, this second observation may have profound implications on the validity of conclusions reached using uniform exit profiles.
Access
Now
SAE MOBILUS Subscriber? You may already have access.
Buy
Select
Price
List
Download
$27.00
Mail
$27.00
Members save up to 40% off list price.
Share
HTML for Linking to Page
Page URL

Related Items

Training / Education
2018-06-04
Technical Paper / Journal Article
2010-09-28