空气射流场温度和速度的测量

Measurement of temperature and velocity of air jet field

冲击射流的应用范围很广,但对于轴对称的冲击射流,目前的试验研究工作却进行的很少.这里所描述的试验是用来测定从圆形孔排出的受热空气射流的特性参数.本试验测定了空气射流内的平均轴向速度和滞止温度,以及在一个和射流轴线相垂直的绝热板上的恢复温度,从而了解了空气射流的特性,并为进一步研究空气射流的特性参数对对流换热系数的影响做了充分的准备工作.

Impinging fluid jet can be used in many areas, but the experiment is seldom conducted for impinging fluid jet of axial symmetry. Experiments were conducted to characterize a heated turbulent air jet discharged from a orbicular orifice. It reported average axis velocity of the air jet ,total temperature and recovery temperature on a flat surface normal to the jet axis so as to obtain the characteristics of the air jet, and do the preparative work for researching the effects of the characteristics of the air jet upon the coefficient of diathermanous convection.