Numerical simulation of cavitation of bio-fuel and diesel fuel in injection nozzle

作者：Yao, Zhihua^*; Hu, Xianguo

来源：Energy Education Science and Technology Part A: Energy Science and Research , 2013, 31(4): 1957-1966.

• Amplitude parameters
• Cavitation characteristics
• Cavitation inception
• Homogeneous mixtures
• Injector nozzle
• Turbulence kinetic energy
• Unsteady
• Unsteady simulations

Bio-fuel is a kind of clean energy which has good application prospects. But the development of cavitation and its influence of atomization of bio-fuel in engine nozzles still remain unknown up to now. In this paper, the two dimensional unsteady cavitation development in engine nozzles using homogeneous mixture flow model plus full cavitation model was numerically simulated based on computational fluid dynamics. The turbulence kinetic energy and the initial amplitude parameter of the nozzle exit were analyzed in detail in order to study the effect of cavitation characteristics on spray and atomization. The unsteady simulation results showed that bio-fuel lag behind of diesel in terms of cavitation inception, critical cavitation and super cavitation, and bio-fuel needs higher injection pressure to arrive at cavitation compared to diesel fuel, and the turbulence kinetic energy and the initial amplitude parameter near the nozzle exit wall of diesel were higher than bio-fuel. So it can be conclude that bio-fuel would get worse spray performance than diesel fuel.

• 出版日期2013
• 单位合肥工业大学