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| Experiment and simulation of spray impingement for gasoline direct injector |
| 1.School of Transportation Science and Engineering, Beihang University, Beijing 100191, China; 2.China Automotive Technology & Research Center, Tianjin 300162, China) |
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Abstract To study the characteristics of gasoline spray after wall impingement from a highpressure gasoline direct injector, a visible test rig was built to detect impinging spray development height, spray radius and spray tip growth rate. The impinging spray process was numerically simulated and verified by experimental data. According to experiment results and simulation,the effects of different injection pressure, ambient pressure, wall distance and angle and wall temperature on the characteristics of spray impingement were discussed. The results show that the spray high and radius are decreased with the increasing of ambient pressure. It is the opposite situation with the increasing of injection pressure. When the wall distance increases, spray high and fuel film thickness decrease, while spay radius increases. Increasing wall inclination and wall temperature can reduce the film thickness,while impingement wall time appear ahead for the enhenced wall inclination.
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2011, Vol. 32 
