Effects of natural gas composition on ignition delay under diesel conditions
Conference
·
OSTI ID:10120939
- Sandia National Labs., Livermore, CA (United States)
- California State Univ., Northridge, CA (United States). Dept. of Mechanical Engineering
- Lawrence Livermore National Lab., CA (United States)
Effects of variations in natural gas composition on autoignition of natural gas under direct-injection (DI) diesel engine conditions were studied experimentally in a constant-volume combustion vessel and computationally using a chemical kinetic model. Four fuel blends were investigated: pure methane, a capacity weighted mean natural gas, a high ethane content natural gas, and a natural gas with added propane typical of peak shaving conditions. Experimentally measured ignition delays were longest for pure methane and became progressively shorter as ethane and propane concentrations increased. At conditions characteristic of a DI compression ignition natural gas engine at Top Dead Center (CR=23:1, p = 6.8 MPa, T = 1150K), measured ignition delays for the four fuels varied from 1.8 ms for the peak shaving and high ethane gases to 2.7 ms for pure methane. Numerically predicted variations in ignition delay as a function of natural gas composition agreed with these measurements.
- Research Organization:
- Lawrence Livermore National Lab., CA (United States)
- Sponsoring Organization:
- Gas Research Inst., Chicago, IL (United States); National Science Foundation, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-48; AC04-76DP00789
- OSTI ID:
- 10120939
- Report Number(s):
- UCRL-JC--115804; SAND--94-8635C; CONF-940711--5; ON: DE94006405; CNN: Grant CTC 9209747 Contract 5091-260-2271 5086-260-1458
- Country of Publication:
- United States
- Language:
- English
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