Method for determining a flow velocity distribution of rough underlayer

摘要

The invention discloses a method for determining a flow velocity distribution of rough underlayer, the experimental equipment used comprises a circulating water canal system with variable ramp and a flow measuring system, wherein the circulating water canal system with variable ramp is used to simulate a flow of the rough underlayer, the flow measuring system is used to the Measure flow velocity distribution in different areas of the circulating water canal system with variable ramp; the method of the present invention is carried out in a variable ramp circulating water channel using a cylindrical aluminum rod for simulating a coarse element on a large scale and changing the degree of immersion, the average cross-sectional flow rate and the distribution density of the coarse elements to conduct experimental studies; the method for determining a rough underlayer flow velocity distribution provided by the present invention enables refined simulation of complex boundary flows such as river water, terrestrial air flow and the like, and provides a definite basis for studying river bed sand deformations, atmospheric pollution problems.