CAJ | 학술논문

在分析激光测速试验资料基础上,通过与正坡上流速分布特性比较,发现负坡垂线流速分布中Karman常数相对正坡为小,负坡上的非均匀流粘性底层范围和厚度均大于正坡上的非均匀流粘性底层范围和厚度等;并在试验基础上提出了统一的垂线流速分布公式.研究成果为进一步研究负坡水流水力特性提供了参考.
재분석격광측속시험자료기출상,통과여정파상류속분포특성비교,발현부파수선류속분포중Karman상수상대정파위소,부파상적비균균류점성저층범위화후도균대우정파상적비균균류점성저층범위화후도등;병재시험기출상제출료통일적수선류속분포공식.연구성과위진일보연구부파수류수력특성제공료삼고.
On the basis of the experimental data measured with a LDA system, vertical velocity distributions are well compared for negative and positive gradient of slopes in different hydraulic conditions in an open channel. It' s concluded as follows: With Froude number increase, Karman constant decrease. A unified formula to describe velocity distribution in adverse slope is proposed and well testified.Viscous sublayer thickness and buffer layer scope in adverse slope are both bigger than those in slope. The authors draw some valuable conclusions and provide some references for the further study about hydraulic characteristics in adverse slope.