Velocity and Drop Size Measurements in a Confined, Swirl-Stabilized, Combusting Spray

TITLE AND SUBTITLE:
Velocity and Drop Size Measurements in a Confined, Swirl-Stabilized, Combusting Spray

AUTHOR(S):
Daniel L. Bulzan

REPORT DATE:
June 1996

FUNDING NUMBERS:
WU-505-62-12

PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES):
National Aeronautics and Space Administration
Lewis Research Center
Cleveland, Ohio 44135-3191

PERFORMING ORGANIZATION REPORT NUMBER:
E-10291

SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES):
National Aeronautics and Space Administration
Washington, D.C. 20546-0001

REPORT TYPE AND DATES COVERED:
Technical Memorandum

SPONSORING/MONITORING AGENCY REPORT NUMBER:
NASA TM-107243
AIAA-96-3164

SUPPLEMENTARY NOTES:
Prepared for the 32nd Joint Propulsion Conference cosponsored by AIAA, ASME, SAE, and ASEE, Lake Buena Vista, Florida, July 1-3, 1996. Responsible person, Daniel L. Bulzan, organization code 2650, (216) 433-5848.

ABSTRACT:
Drop size and velocity measurements in a confined, swirl-stabilized, reacting spray are presented. The configuration consisted of a center-mounted research air-assist atomizer surrounded by a coflowing air stream. A quartz tube surrounded the burner and provided the confinement. Both the air-assist and coflow streams had swirl imparted to them in the same direction with 45-degree-angle swirlers. The fuel and air entered the combustor at ambient temperature. The gas-phase measurements reported were obtained from the velocity drops with a mean diameter of four microns. Heptane fuel was used for all the experiments. Measurements of drop size and velocity, gas-phase velocity and drop number flux are reported for axial distances of 2.5, 5, 10, 15, 25, and 50 mm downstream of the nozzle. The measurements were performed using a two-component phase/Doppler particle analyzer. Profiles across the entire flowfield are presented.

SUBJECT TERMS:
Combuston; Swirling; Spray characteristics

NUMBER OF PAGES:
17

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