FLAME PROPAGATION, AUTOIGNITION AND COMBUSTION IN ALCOHOL-PETROLEUM-AIR MIXTURES AND OTHER ALTERNATIVE FUELS. PROGRESS REPORT NO. 3, AUGUST 1, 1977--JULY 31, 1978

Due to the energy crisis, petroleum-derived gasoline and other distillates may be replaced in the future by such alternative fuels as alcohols, alcohol-petroleum blends and coal and shale oil derivatives. The main goal of this program is to determine the combustion characteristics of these alternative fuels in gasoline, diesel, and gas turbine engines so that future combustion engines may be designed for the best energy conversion and minimum emissions. The approach consists of studying the process of combustion in actual engines to obtain data needed to either design new engines or modify and adapt existing engines to the alternative fuels. This includes both experimental and theoretical work. The experimental work consists of instrumenting and running tests on three research engines and measuring the following combustion characteristics: (a) motor octane number of the fuel, (b) flame speed, (c) flammability limits, (d) cycle-to-cycle variations, (e) emissions, (f) performance parameters, such as power and economy, (h) ignition delay, and (i) cetane number of the fuel. The present cetane scale has been evaluated during this program and found unsuitable to rate the low ignition quality fuels and many alternative fuels. Work on this contract resulted in developing a new modified scale that is suitable for rating all fuels. The theoretical work includes (a) calculating and correlating the flame speed with different fuel properties and engine operating parameters, (b) determining the effect of turbulence, (c) correlating the ignition delay with air and fuel properties, (d) characterizing the fuels by determining the global activation energy for the autoignition reaction, and correlating it to the cetane number of the fuel, and (e) studying in detail the combustion parameters used in the cetane scale. (ERA citation 04:008585)

  • Corporate Authors:

    Wayne State University

    Detroit, MI  United States  48202

    Department of Energy

    1000 Independence Avenue, SW
    Washington, DC  United States  20585
  • Authors:
    • Henein, N A
  • Publication Date: 1978-6

Media Info

  • Pagination: 11 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00191643
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Contract Numbers: EC-77-S-02-4486
  • Files: TRIS
  • Created Date: May 26 1979 12:00AM