CRITICAL ASSESSMENT OF EMISSIONS FROM AIRCRAFT PISTON ENGINES

A comprehensive mathematical analysis for evaluating the measured emissions from piston type general aviation aircraft engines is presented and discussed. The analysis is used to calculate the fuel-air ratio, molecular weight of the exhaust products, and water correction factor. Further. a sensitivity analysis is presented which shows the effects of emission measurement errors on calculated fuel-air ratio. The University's test facility is briefly described and the associated emissions instrumentation is discussed in detail. The experimental results obtained in this facility on the AVCO-Lycoming LIO-320 engine are presented. This includes baseline and lean-out emissions data and the influence of sampling probe location in the exhaust pipe. The influence of leaks in the exhaust system or emissions console are investigated and evaluated in terms of the mathematical model. Experimental data obtained from various facilities are compared and evaluated. (Author)

• Corporate Authors:

  University of Michigan, Ann Arbor

  Department of Aerospace Engineering
  Ann Arbor, MI  United States  48109

  Federal Aviation Administration

  Systems R&D Service, 800 Independence Avenue, SW
  Washington, DC  United States 

  National Aviation Facilities Experimental Center

  Federal Aviation Administration
  Atlantic City, NJ  United States  08405
• Authors:
  • Mirsky, W
  • Pace, R
  • Ponsonby, R
  • Nicholls, J A
  • Geister, D E
• Publication Date: 1979-6

Media Info

• Pagination: 158 p.

Subject/Index Terms

• TRT Terms: Air pollution; Aircraft; Combustion; Engines; Exhaust gases; Fuel air mixtures; General aviation aircraft; Mathematical analysis; Mathematical models; Molecular weight; Piston engines; Pollutants
• Uncontrolled Terms: Air fuel ratio; Aircraft engines
• Old TRIS Terms: Combustion products
• Subject Areas: Aviation; Vehicles and Equipment;

Filing Info

• Accession Number: 00198986
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: FAA-RD-78-82 Final Rpt., FAA-NA-78-1
• Contract Numbers: DOT-FA74NA-1102
• Files: NTIS, TRIS, USDOT
• Created Date: Nov 7 1980 12:00AM