液体燃料射流破碎的热不稳定性分析

利用线性不稳定性理论，基于基本控制方程和边界条件，获得了表征黏性液体射流射人高温气体介质的射流不稳定性所对应的色散方程，并对该方程进行了数值求解，根据计算结果，分析了若干因素对加热条件下Reylei曲模式和Taylor模式液体射流热不稳定性的影响，结果表明，对上述两种模式的液体射流，由温度梯度引起的热毛细力是促进射流破碎的重要原因，并且这种作用在Taylor模式液体射流中表现更为显著。

Analysis of Thermal Instability for the Breakup of Liquid Jets

Based on governing equation and boundary condition, a linear temporal thermal-instability analysis has been made for a viscous liquid jet injecting into the high temperature gas medium. The dispersion equation is derived and solved by numerical method. The result is used to investigate the effects of several parameters on the growth rate and dominant wavenumber of surface waves. It is found that the thermal capillary force induced by the temperature gradient is the main cause for the breakup of liquid jets in both Reyleigh and Taylor regime, and this effect is more obvious for liquid jets in Taylor regime.