Spray characteristics and controlling mechanism of fuel containing CO₂

Spray characteristics and controlling mechanism of fuel containing CO₂

Abstract

This paper presents studies of spray characteristics and controlling mechanism of fuel containing CO₂. Using diesel fuel containing CO₂ gas, experiments were conducted on diesel hole-type nozzles and simple nozzles. The steady spray and transient spray characteristics were observed and measured by instantaneous shadowgraphy, high-speed photography, phase Doppler anemometry (PDA) and LDSA respectively. The effects of CO₂ concentration in the fuel, the injection pressure, the nozzle L/D ratio, surrounding gas pressure and temperature on the atomization behavior and spray pattern were evaluated. The results show that the injection of fuel containing CO₂ can greatly improve the atomization and produce a parabolic-shaped spray; and the CO₂ gas concentration, surrounding gas pressure, temperature and nozzle configuration have dominant influences on spray characteristics of the fuel containing CO₂. New insight into the controlling mechanism of atomization of the fuel containing CO₂ was provided.

Keywords

spray characteristics / fuel atomization / fuel containing CO₂

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Acknowledgements

This project was supported by the National Natural Science Foundation of China (Grant No. 50136040) and Major State Basic Research Development Program of China (No. 2001CB209208). The authors are grateful to Mr. Hisao Nakamura and Mr. Hou Yuchun for their help with the experiments

版权

2014 Higher Education Press and Springer-Verlag Berlin Heidelberg