【摘要】 对溶有甲烷柴油的稳态喷雾特性进行研究。喷雾特性和形状分别由激光粒度分析仪LDSA1300A和数码照相机记录。试验使用了六个不同长径比L/D的直圆孔喷嘴。溶解压力和喷射压力范围分别是0.1MPa到10MPa和5MPa到10MPa。研究了甲烷溶解度、测量位置、喷射压力和喷嘴参数对喷雾特性的影响。结果表明:在柴油中溶入甲烷,出现了减压沸腾喷射现象;与纯柴油相比,喷雾形状和锥角产生了很大变化;流量系数随着溶解度和L/D值的增加而减小;甲烷溶解度和L/D的共同作用对雾化有正反两方面的影响。更多还原

【Abstract】 Investigation on steady spray characteristics of diesel fuels containing dissolved CH₄ was carried out.Spray characteristics and pattern were recorded by the particle size analyzer（LDSA1300A） and digital camera,respectively.Six straight-rounded-hole nozzles with different length/diameter ratio（L/D）were employed.The dissolving pressure was set from 0.1 MPa to 10 MPa,and the injection pressure was from 5 MPa to 10 MPa.The effects of the concentration of dissolved CH₄ in fuel,the measurement position,the injection pressure,and the nozzle parameter on the spray characteristics were investigated.The results show that,in the presence of dissolved CH₄ in diesel fuel,flashing injection phenomenon appears,and spray pattern and spray angle are changed remarkably compared with those of pure diesel fuel.Discharge coefficient decreases with the increase of CH₄ dissolved in diesel fuel and L/D value.Both positive and negative effects on atomization are observed due to the combined influence of the concentration of CH₄ and L/D value.更多还原