Investigation of an anti-knock index and hydrocarbon emissions of various natural gas blends.

Details

• Creators:
  Van Alstine, Daniel G. ; Montgomery, David T.
• Corporate Creators:
  Caterpillar Inc.
• Corporate Contributors:
  United States. Department of Transportation. Federal Railroad Administration. Office of Railroad Policy and Development ; United States. Department of Transportation. Federal Railroad Administration. Office of Research and Development
• Subject/TRT Terms:
  • Algorithms
  • Combustion
  • Dual powered locomotives
  • Engine knock
  • Hydrocarbons
  • Locomotives
  • Natural gas
  • Pollutants
  • Locomotive
  • natural gas
  More +
• Publication/ Report Number:
  DOT/FRA/ORD-16/07
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Contracting Officer:
  Shurland, Melissa
• Corporate Publisher:
  United States. Federal Railroad Administration. Office of Research and Development
• Abstract:
  The North American rail industry is examining the use of natural gas to reduce fuel costs for locomotives that are powered by dual ; fuel engines. This report evaluates the ability of an existing methane number algorithm to predict rapid combustion in a dual fuel ; engine. The Methane Number index, which quantifies the propensity of a gaseous fuel to autoignite, has the ability to well-characterize ; engine knock in spark-ignited combustion. However, the ability of the methane number, which was originally ; developed for spark-ignited engines, to predict a fuel’s “knock” behavior in dual fuel combustion is not fully understood. ; Specialized natural gas fuel blends are tested in a dual fuel engine and induced to rapid combustion. For fuels that should exhibit ; similar knock behavior, the transitions to rapid combustion occurred at significantly different conditions. This demonstrated that ; the existing methane number algorithm, while excellent for spark-ignited engines, did not fully predict the propensity for rapid ; combustion to occur in a dual fuel engine within the scope of this study. In its current form, a methane number algorithm can be ; used to conservatively rate dual fuel engines. It is possible that a new reactivity index for dual fuel combustion might allow ratings ; to be less conservative.
  More +
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/31181/dot_31181_DS1.pdf
• File Type:
  [PDF - 1.33 MB]
• Collection(s):
  US Transportation Collection ; Federal Railroad Administration
• Main Document Checksum:
  urn:sha256:a098c5335dd9afcb7a15915d186657b56416f4238d0463fbec73493fd150767b