Device and method for measuring air entrainment concentration
A gas-entrained concentration and measuring device technology, which is applied to the analysis of materials, instruments, etc., can solve the problem of low accuracy
Pending Publication Date: 2018-11-13
JIANGSU WATER CONSERVANCY SCI RES INST
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[0007] The purpose of the embodiments of the present invention is to provide a gas-entrainment concentration measurement device and method to solve the problem of low accuracy of existing gas-entrainment concentration measurement methods
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Embodiment 1
[0023] Such as figure 1 , figure 2 As shown, the device for measuring aeration concentration provided in this embodiment includes an inflow system, a gas-liquid separation system, a flow measurement system and a gas measurement system.
[0024] The inflow system comprises a steep drainage groove 1 and a sponge baffle 2, the sponge baffle 2 is arranged above the steep drainage groove 1, and the height of the sponge baffle 2 is adjustable up and down. During the measurement process, adjust the height of the sponge baffle 2 so that its bottom just touches the water surface of the experimental water body to form a liquid seal. Usually, there are two sponge baffles 2 at intervals: the first sponge baffle is used to intercept the flowing gas carried by the inflow water body, and the second sponge baffle can block the downstream gas backtracking.
[0025] The gas-liquid separation system includes a gas-liquid separation box 3, an energy dissipation grid 4, and an overflow baffle 5...
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The invention discloses a device for measuring air entrainment concentration. The device comprises a flow inlet system, a gas and liquid separation system, a flow measuring system and a gas measuringsystem; the flow inlet system is used for isolating a tested object water and the air in the environment, and comprises a weepage chute and a sponge baffle; the sponge baffle is arranged above the weepage chute; the gas and liquid separation system is used for separating an aqueous phase and a gas phase of the tested object water, and comprises a gas and liquid separation box, an energy dissipation grid and an overflow baffle; the energy dissipation grid and the overflow baffle are fixed below the internal part of a gas and liquid separation box; the overflow baffle is positioned at the downstream of the energy dissipation grid; an inlet, a gas outlet and a water outlet are formed on the gas and liquid separation system; the weepage chute is communicated with the inlet; the flow measuringsystem is communicated with the water outlet; and the gas measuring system is communicated with the gas outlet. The invention also discloses a method for measuring the air entrainment concentration. The aqueous phase and the gas phase in the air entrained water flow are separated, the volume or flow of different separation phases is measured separately, the average air entrainment concentration ofthe air entrained water flow is calculated accurately, and the problem of measurement of the average air entrainment concentration of the air entrainment water flow is solved.
Description
technical field [0001] The invention relates to the technical field of water conservancy and hydropower engineering, in particular to an aeration concentration measuring device and method. Background technique [0002] Aeration of water flow widely exists in various discharge structures: For spillways or spillway tunnels with high water head and long flow, high-speed water flow will cause cavitation and cavitation damage to the discharge channel structure, and aeration measures are often used in engineering to reduce the discharge Groove cavitation cavitation; in addition, self-aeration occurs on the water flow surface; the turbulent water flow and violent turbulence in the shaft pipeline will also entrain air, and the air-carrying phenomenon is more complicated. Therefore, the aeration of water flow has always been an important topic in the research of multiphase fluid mechanics, and the aeration concentration of water flow is one of the very important parameters in the res...
Claims
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Login to View More IPC IPC(8): G01N7/00
CPCG01N7/00Y02W10/10
Inventor 况曼曼王冬梅王芳芳王才欢梁文广王春美杨印王轶虹宋亚君李霞钱程
Owner JIANGSU WATER CONSERVANCY SCI RES INST