| 严春吉.可压缩气体中粘性液体射流分裂与雾化机理[J].,2008,(3):339-343 |
| 可压缩气体中粘性液体射流分裂与雾化机理 |
| Breakup and atomization of viscous liquid jets in a compressible gas |
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| DOI：10.7511/dllgxb200803006 |
| 中文关键词: 射流 分裂与雾化 稳定性 可压缩性 |
| 英文关键词: jet breakup and atomization stability compressibility |
| 基金项目:大连海事大学青年教师科研基金资助项目(DLMU-ZL-200710). |
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| 中文摘要: |
| 采用空间线性稳定性分析方法对可压缩气体中的三维粘性液体射流分裂与雾化机理进行了研究，得到了具有普遍三维扰动形式的、描述射流自由表面扰动发展的色散关系．影响射流分裂与雾化的参数有Reynolds数、Weber数、气液密度比及气体介质相对于射流运动参考系的Mach数．Reynolds数、气液密度比和Mach数在射流分裂与雾化过程中总是起着不稳定性的作用．Weber数的作用较复杂，当Weber数较小时，气液界面上的扰动增长率随着它的增大而减小；当Weber数较大时，它在射流分裂与雾化过程中起着不稳定性的作用． |
| 英文摘要: |
| The mechanisms of the breakup and atomization of a three-dimensional viscous liquid jet which is injected into a compressible gas are studied by using the method of spatial linear stability analysis. The dispersion relation is obtained which delineates the evolution of a general three-dimensional disturbance on the free surface. The primary parameters that govern the growth rates of the disturbances are the Reynolds number the Weber number density ratio which is a ratio of gas density to liquid density and the Mach number of the ambient gas with respect to the frame of reference moving jet. The Reynolds number density ratio and the Mach number always tend to promote the instabilities of the liquid jets. The influences of the Weber number on the jet stabilities are complex. When the Weber number is in small region the growth rates of the disturbances decrease with an increase of Weber number; while it is in large region it promotes the disturbance growth rates of the liquid jets. |
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