摘要
对近壁流动或称粘性次层流动的研究有着十分重要的意义［１］，因为许多重大难题如：湍流边界层的结构、固体表面与流体之间的传质传热、人工减阻的机理等问题均与其密切相关。本文着重叙述用热线风速仪测量极近因壁区的流速分布及存在的问题，并进行讨论。
Velocity distribution and flow structures in the sublayer of the boundary layer are related to many interesting problems,eg.turbulent structures in boundary layer,heat and mass transfer in the wall region,mechanism of artificial drag reduction, etc.In this paper,the velocity distribution in the vicinity of the wall are measured with hou wire anemometer.The practical difficulties and their solutions are discussed.
关键词
热线测速
桥路电压
附加热量损失
Hot Wire Anemomtry
viscous sublayer
bridge voltage
additional heat loss
