【摘要】 利用线性不稳定性理论分析了液体燃料射流在分别采用时间模式与空间模式两种方法下液体表面扰动波的波数、频率及最大扰动增长率之间的关系，讨论了两种模式下液体射流结构特征的差别。应用基于粘性液体射流射入气体介质中的物理模型，计算分析了 Ｒｅ 数、 Ｗｅ 数和密度比 Ｑ对时间模式与空间模式差值的影响，结果发现采用时间模式或空间模式并不改变液体射流各阶模式之间的相互关系， Ｗｅ 数和 Ｑ是影响时间模式与空间模式差值的主要因素，而 Ｒｅ 数影响不大。在一定条件下，时间模式与空间模式具有等效性。更多还原

【Abstract】 In this paper an analysis is made for differences in jet structure,wavenumber,frequency and growth rate of disturbance surface wave of a liquid jet under conditions when temporal and spatial mode are respectively applied.It is found that the relationship among the unstable modes of the jet remains unchanged for these two modes.It is the Weber number We and the density ratio Q ,rather than the Reynolds number Re ,that play very important role in the differences between temporal mode and spatial mode.The results show that the two modes give almost the same results in the case of fuel injection when We <10 -3 and Q <10 -2 .更多还原