Lookup NU author(s): Dr Yiji Lu,
Professor Tony Roskilly,
Dr Andrew Smallbone
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In order to study the fuel spray and combustion characteristics, a Constant Volume Vessel (CVV) system has been designed and constructed. The CVV system consists of four observing windows, a fuel delivery system, a common rail, optical measurement instruments and control system. The CVV is designed to be used for can withstand 100 bar at up to 600 K internal air temperature. The control program coded in LabVIEW is capable of triggering the injector and measurement instruments, monitoring all parameters of the system and controlling the temperature of the windows within 150℃. The experiment on several sustainable fuels spray were conducted at 1800 bar fuel pressure, 80℃ fuel temperature, 70 bar background pressure and 100℃ background temperature, and the spray tip penetration and cone angle were measured at different time. A two-dimensional geometric model with over 18000 cells has been built in computational fluid dynamics (CFD) modeling. The modeling work in predicting fuel spray has been studied under the same conditions as the experiment. The RNG k-ε turbulence model was selected for the continuous phase and the Wave breakup model and KHRT breakup model were configured respectively for the discrete phase. The models were validated by the experimental data since the difference between the predicted and experimental results were within 5% for spray tip penetrations and 10% for cone angle at most flow time. The both the experimental and predicted results indicated that the spray tip penetration grew with a decreasing tip velocity and the cone angle increased gradually after a dramatic growth and slight drop.
Author(s): Zhang ZC, Lu YJ, Roskilly AP, Smallbone AJ, Chen LF, Wang YD
Publication type: Conference Proceedings (inc. Abstract)
Publication status: Published
Conference Name: 4th Sustainable Thermal Energy Management International Conference
Year of Conference: 2017
Print publication date: 28/06/2017
Acceptance date: 15/05/2017