Underwater self suction injection stream flow characteristic integrated test device system

Abstract

The invention discloses an underwater self-suction injection stream flow characteristic integrated test device system which comprises a self-suction nozzle device and a submerging device which are made of organic glass. The self-suction nozzle device is at the upper part of the integrated test device system and is formed by a self-suction nozzle and a gas turbine flow meter. The submerging device is at the lower part of the integrated test device system and is formed by a bearing water tank, a safety valve, a pressure meter, a target plate and a bracket, a pressure measuring cover plate, a water discharge valve and a gas exhaust valve. According to the integrated test device system, the gas and liquid phase flow characteristics in the self-suction nozzle can be observed and tested, the impact flow characteristics of two gas and liquid phase injection flows can be observed and tested, the impact performance is understood, the nozzle has a wide application prospect in the aspect of water environment protection, such as pneumatic sediment transportation by impinging jet, the improvement of water quality by jet aeration, and the main engineering fields have river governance, reservoir and pumping station dredging and river pollution control.

Description

technical field [0001] The invention relates to the technical field of water jets, in particular to an integrated test device system for jet flow characteristics of underwater self-suction nozzles. Background technique [0002] A low-pressure and high-flow self-excited air-breathing jet nozzle has been disclosed in the prior art (refer to Patent Document 1), which is aimed at the seriousness of sediment deposition in many rivers and reservoirs in my country and how to activate the sediment at the bottom of the reservoir. Designed for , suspension and transportation, the self-excited air-breathing jet nozzle can disturb the sediment and carry it away with the help of water flow, thereby effectively controlling and reducing sediment deposition in river courses and reservoirs. Self-excited air-breathing nozzles belong to the category of low-pressure and high-flow nozzles. The internal flow of the nozzle and the impact flow of the jet flow are both gas-liquid two-phase flow. [...

AI Technical Summary

Problems solved by technology

[0006] If the existing nozzle jet flow characteristics testing device system is used, it will be very difficult to observe and test the gas-liquid two-phase flow characteristics inside the self-suction nozzle and the nozzle gas-liquid two-phase jet impact characteristics

[0007] Moreover, since the existing nozzle testing device system places the self-aspiration nozzle as a whole inside the pressure water tank of steel structure, the volume of the pressure water tank will become larger, which increases the manufacturing cost and operation difficulty

In addition, the self-aspiration nozzle is placed inside the steel pressure water tank as a whole, and the suction pipe and test pipeline connecting the self-aspiration nozzle and the turbine flowmeter are also placed inside the pressure water tank. When the pressure reaches a certain level, the suction pipe will be squeezed, which will affect the suction capacity and self-suction performance of the nozzle, and further affect the internal flow characteristics of the nozzle and the authenticity of the impact force effect and the accuracy of the test effect of the test device system. sex

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