High-speed sand-carrying water flow cavitation erosion damage test device

Abstract

A high-speed sand-carrying water flow cavitation erosion damage test device comprises a base, a water tank is arranged on the base and comprises an inner cylinder and an outer cylinder which are sleeved inside and outside, an inner cavity of the inner cylinder is communicated with a first water inlet branch pipe and a second water inlet branch pipe, and the water outlet end of the first water inlet branch pipe and the water outlet end of the second water inlet branch pipe are jointly communicated with a main pipeline. A cavitation erosion section for observing cavitation erosion damage of the concrete test piece is arranged on the main pipeline; a base is arranged at the bottom of the cavitation erosion section, a plurality of pressure measuring holes facilitating real-time collection of pressure of all pressure measuring points are formed in the base, a containing box used for containing a concrete test piece is arranged at the top of the cavitation erosion section, and the water outlet end of the main pipeline is divided into a first branch pipe, a second branch pipe and a third branch pipe. The water outlet ends of the first branch pipe, the second branch pipe and the third branch pipe are communicated with the inner cavity of the inner cylinder. The device is easy to simulate the influence of various sand contents, particle sizes, gradation and the like on the sand-carrying high-speed water flow cavitation damage, effectively controls the water flow cavitation number, and can analyze the cavitation damage strength by observing the cavitation degree of the concrete test piece.

Description

technical field [0001] The invention relates to the technical field of cavitation damage tests, in particular to a cavitation damage test device for high-speed sand-laden water flow. Background technique [0002] Cavitation cavitation has always been a common but not completely solved technical problem in water conservancy and hydropower projects, ships, and naval weaponry. The spillway tunnels of Longyangxia and Ertan, the sills of Xin’an River and Fengman Dam, the spillway tunnels of Hoover Dam and Glen Canyon Dam in the United States, Sayan-Shushensk in the Soviet Union (Саяно—Шушенск) hydropower station stilling basin floor has suffered serious cavitation damage, affecting the normal and safe operation of the project. At present, the mechanism of cavitation is generally believed that "cavitation is caused by the collapse of migratory cavitation or the repeated impact of shock waves and micro jets on the surface of materials when migratory cavitation collapses on the inn...

AI Technical Summary

Problems solved by technology

Does the presence of sediment in sand-carrying water "promote" or "inhibit" cavitation damage? However, it is difficult to draw conclusions through theoretical analysis on the role of various characteristics of sediment on the role of high-speed water flow in cavitation damage.

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