An investigation of the effects of fuel composition on combustion characteristics in a T-63 combustor
By: R.W. Dubeau, P.J. Hickey, A.C. Krug, A.L. Lohman, J.P. Weller, D.W. Netzer
Contributors: Hickey, P. J.; Krug, Andrew Clarence; Lohman, Alan L.; Weller, J. P.; Netzer, David W.; Naval Postgraduate School (U.S.). Dept. of Aeronautics
Publisher: Naval Postgraduate School; Available from National Technical Information Service
Published: 1985
Place of publication: Monterey, Calif; Springfield, Va
Language: eng
Number of pages: 79
Subjects: FUELS; COMBUSTION; FUEL ADDITIVES; FUEL AIR RATIO
Other titles: NPS-67-85-004.
Description: A T63 combustor was instrumented to allow measurement ofcenterline distributions of      temperature and soot size and concentration using water-cooled probes. Three-wavelength      light transmission measurements were also made at two locations to determine the mean soot      size and NOx concentrations were measured in the exhaust duct. Five fuels of varying      composition were used in the combustor and initial tests were conducted using two      smoke-suppressant fuel additives. The data indicated that the aft region of the combustor      contained a large, low temperature recirculation zone, surrounded by an annular region of      higher temperature and lower soot concentration. Light transmissionn measurements      appeared to yield reasonable particle size data when compared to collected samples.      However, the extent of agglomeration in the collection probes was unknown.      Smoke-suppressant fuel additives were found to have reduced effectiveness in the present      test series, apparently due to unheated inlet air which was employed. NOX levels increased      significantly with increasing combustor exhaust temperature (or fuel-air ratio). Soot      concentration increased and transmittance decreased with increasing fuel-air ratio. The mean      soot particle size was found to be between 0.21 and 0.26 micronns, independent of fuel      composition and fuel-air ratio.
Notes: Title from cover.

"NPS-67-85-004."

"March 1985."

AD A157 325.

Includes bibliographical references (p. 77).

aq/aq cc:9116 01/20/99.