摘要
针对目前描述液滴碰壁现象的经验模型的不足,基于TAYLOR比拟思想建立了单液滴碰壁的TAR模型。该模型指出,判别液滴能否反弹的临界韦伯数不是一个常数,而是随滴径发生变化。对较大液滴,计算所得的临界韦伯数与反弹速度和实验值较为吻合;但小滴径液滴碰壁后行为与大滴径液滴很不相同。这一结论对于完善三维喷雾碰壁模型具有重要意义。
A TAR model is presented to calculate the droplet impingement on a solid wall. Calculating results suggest that the critical Weber number for rebounding is not a constant, but varies with the radius of droplets. For large drops, the critical Weber number and rebounding velocities accord well with experimental value. However, the hydro - dynamical behavior of small droplets is very different from that of large drops. The conclusions are significant for modeling engine spray/wall interaction.
出处
《武汉理工大学学报（信息与管理工程版）》
CAS
2007年第10期73-76,共4页
Journal of Wuhan University of Technology：Information & Management Engineering
关键词
单液滴
碰壁
临界韦伯数
single drop
impingement
critical Weber number
