Design method of test water tank with special-shaped cross section and application of design method

Abstract

The invention discloses a design method of a test water tank with a special-shaped cross section and application of the design method. The test water tank with the special-shaped cross section comprises a lower groove and an upper groove; the lower edge of the upper groove is connected with the upper edge of the groove wall of the lower groove; the cross section of the lower groove is rectangular,semicircular or triangular; and the groove wall of the upper groove is composed of two axisymmetric curves. According to the design method, the design hydraulic radius R and lower groove width b of the water tank are determined; the lower groove depth d and water tank width B of the water tank are calculated; and finally the groove wall curve equation of the upper groove is calculated. Accordingto the method, the cross section of the test water tank is designed into a special-shaped cross section, so that the cross section passage hydraulic radius of the water tank does not change with the change of water depth (mud depth) during a test, and therefore, a variable control effect can be realized, and the problem that the cross section passage hydraulic radius of an existing rectangular test tank is difficult to control can be solved, and convenience is provided for the investigation of relationships between the cross section average flow velocities and other kinematic parameters of clear water flow, high-sandiness flow and debris flow and the cross section passage hydraulic radius of the clear water flow, high-sandiness flow and debris flow.

Description

technical field [0001] The invention relates to a design method of a special-shaped cross-section test tank with a fixed hydraulic radius and an application thereof, which is suitable for engineering simulation test research and belongs to the fields of hydraulic engineering optimization design and debris flow disaster prevention and mitigation. Background technique [0002] Flume simulation test is one of the commonly used methods to study the movement characteristics of clear water flow, high sediment flow, and debris flow. The control accuracy of the water tank test device and the measurement accuracy of the test instrument are important factors affecting the accuracy of the test results. Therefore, the parameter control method and accuracy of the water tank simulation test and the equipment accuracy of the measuring instrument need to be continuously improved and improved. [0003] At present, the section of the simulation test device for clear water flow, high sand cont...

AI Technical Summary

Problems solved by technology

The reason is that: the tailgate will cause solid matter to deposit, thereby changing the properties of the fluid; it is also very difficult to control the water depth (mud depth) of the test section of the tank through the total water volume, because the high-sand content flow and debris flow are not homogeneous fluids, during the test process The fluctuation of water depth (mud depth) in the

On the other hand, the existing method of calculating the hydraulic radius of the cross-flow section is very dependent on the water depth (mud depth), and the measurement accuracy of the water depth (mud depth) has a great influence on the calculation accuracy of the hydraulic radius, especially in high sediment flow and During the debris flow test, the fluid depth is difficult to measure accurately, which has a great influence on the test results

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