BEHAVIOUR OF AIR ENTRAINED BY ROLLERS AT THE POINT IF NON-AERATED PLUNGING JET ENTRY
射流冲击水垫塘入射点旋涡掺气特性的研究

This paper investigates behaviour of air ent rained by rollers at the point ofnon-aerated plunging jet entry. Experimental results indicate that air retained from thepoint of jet entry diffuses along shear layer.Air concentration at the point of entry increocseswith water depth decreasing.There is a form of error function for velocity distribution ofair-water mixture in shear laver. Air concentration is correspondent to normal distribution,in internal and external shear layers respectively. The agreement between the theoreticalequations and the experimental results is good.In addition,the thickness of air-water mixinglayer and air flow rate near the point of jet entry are given theoretically.