Accession Number:

ADA071002

Title:

Critical Assessment of Emissions from Aircraft Piston Engines.

Descriptive Note:

Final rept. Jun 74-May 78,

Corporate Author:

MICHIGAN UNIV ANN ARBOR DEPT OF AEROSPACE ENGINEERING

Report Date:

1979-06-01

Pagination or Media Count:

158.0

Abstract:

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 Universitys 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

Subject Categories:

  • Aircraft
  • Reciprocating and Rotating Engines
  • Air Pollution and Control

Distribution Statement:

APPROVED FOR PUBLIC RELEASE