利用线性不稳定性理论 ,对粘性液体燃料射流射入气体介质的射流模型所对应的色散方程进行了数值求解。利用计算结果 ,分析了液体燃料射流不稳定性研究中的 3个最重要的无量纲参数韦伯数 We、雷诺数 Re及密度比 Q,对分别处于瑞利模式和泰勒模式下的液体射流的最不稳定频率及对应的最大扰动增长率的影响。结果表明 ,在不同的射流模式下 ,这 3个无量纲数对液体射流最不稳定频率的影响是不同的 ,在这两种射流模式下 ,射流系统具有不同的频率特征 Using the theory of linear instability, the dispersion equation corresponding to the jet model of viscous liquid fuel jet injected into the gas medium is numerically solved. Based on the calculation results, the three most important dimensionless parameters Weber, Reynolds number Re and density ratio Q in the study of liquid fuel jet instability are analyzed. The maximum of liquid jets in the Rayleigh and Taylor models The effects of unstable frequency and corresponding maximum disturbance growth rate. The results show that the influence of the three dimensionless numbers on the most unstable frequency of liquid jets is different under different jet modes. In both jet modes, the jet system has different frequency characteristics