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MAE PhD Defense – Zengyang Wu
November 1, 2017 @ 10:00 am - 12:00 pm
TITLE: Investigation of spray and combustion of piezo-electric fuel injector for gasoline direct inject engines
ADVISOR: Dr. Tiegang Fang
DATE & TIME: Wednesday, November 1, 2017 at 10 AM
LOCATION: EB3 – 3115
Experimental fuel spray and combustion investigation of multiple gasoline-like fuels was conducted in an optically accessible constant-volume chamber using an outwardly opening piezoelectric fuel injector. The ambient pressure for non-reacting spray experiments was varied from 0.01 bar to 12.5 bar. Spray characteristics, including spray penetration length, spray angle and spray front fluctuation were analyzed and discussed. For spray combustion experiments, ambient temperatures from 800K to 1200K, and ambient oxygen concentrations from 10% to 21% were selected to evaluate effect of ambient temperature and ambient oxygen concentration on fuel auto-ignition characteristics. Two color pyrometry were applied to calculate transient flame temperature distribution and KL factor distribution.
Zengyang attended University of Science and Technology of China and graduated in 2013 with a B.S. in Mechanical Engineering. Following graduation he was accepted into the North Carolina State University Ph.D. program in the Mechanical and Aerospace Engineering Department under Dr. Tiegang Fang. While pursuing a Ph.D. degree, he earned his M.S. degree in Mechanical Engineering from North Carolina State University. His research interests include spray and combustion of piezo-electric fuel injector for gasoline direct inject engines.