【摘要】 利用线性化方程处理,分别以线性型、二次函数型以及修正的Stokes型3种不同的气体速度型对自由平面液膜进行了稳定性分析,并与无黏气体进行了对比;结果表明,修正的Stokes速度型与已有文献中的实验结果吻合最好,且液膜的稳定性随边界层的厚度增大而提高。考虑气体黏性能够提高对平面液膜稳定性分析的准确性。更多还原

【Abstract】 The effect of viscous air on the stability of a planar liquid sheet was studied. Three velocity profiles( linear,quadratic and modified Stokes models) were combined separately with linear instability analysis. Dispersion curves of the three conditions were compared with experimental data in former literature,and the inviscid air result was referenced as well. It is shown that the modified Stokes velocity profile yields excellent agreement with experimental data. Besides,for all three boundary velocity profiles,the instability of liquid sheet improves with the increase of the boundary thickness. Taking the gas viscosity into consideration can stabilize the sheet and improve the accuracy of the calculation result.更多还原