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Emission Characteristics of an Aircraft Auxiliary Power Unit.

Authors
Penn-FW; Marshall-WF
Source
NTIS: PB 228 782 :13 pages
Link
NIOSHTIC No.
10008982
Abstract
An aircraft auxiliary power unit (apu) was used as an exhaust source for evaluation and refinement of sampling and analytical procedures for gas turbine engines. The unit was also used to determine the emission characteristics of apu's in service and to study the effect of fuel composition and combustor design on exhaust emissions. Carbon monoxide, carbon dioxide, oxides of nitrogen, hydrocarbons, aldehydes, particulate loading, and odor were measured at engine operating modes representing the duty cycle encountered in airline operation. Analyses showed good repeatability, and adequate sensitivity was attained in these experiments. Smoke opacity measurements were not taken owing to the lack of a high-sensitivity smokemeter. Results showed that the minimum emission levels occurred with the standard combustor and jet a fuel. Emission rates were highly dependent on test mode, but emission patterns as a function of test mode were similar for all fuels and combustors tested. A comparison of three identical design production combustors showed a variation in average emission rates of less than 5 pct.
Publication Date
19730101
Document Type
IH; Report of Investigation;
Fiscal Year
1973
NTIS Accession No.
PB-228782
NTIS Price
A03
Identifying No.
RI 7735
NIOSH Division
BERC;
Source Name
NTIS: PB 228 782
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