Effect of Lateral Inflow on Steady Open Channel Flows.

摘要

By a critical examination of one-dimensional open channel flow analysis,it can be shown that a single momentum or energy equation as widely used in the past is not sufficient to explain certain anomalies in the nonuniform flow region. Additional equations are necessary for evaluating energy and mixing losses. In this study these equations are developed and shown to be satisfactory in matching experimental results. Furthermore,the streamwise variation of momentum and energy correction factors is determined from the following two methods: (1) a direct numerical integration of momentum and energy flux across a section of open channel,obtained from the measured velocity distributions,and (2) a numerical solution of the momentum and energy equations for the correction factors,using the flow variable derived from experimental data,which is shown to be a pertinent parameter for the nonuniform flow field. The results should further the understanding of the flow behavior in the mixing region and provide a scheme of open channel flow analysis to improve design methods.