Method of decompression test of air entrainment and cavitation alleviation model
A test method, model technology
Active Publication Date: 2012-05-02
NANJING HYDRAULIC RES INST
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[0023] The technical problem to be solved by the present invention is: in view of the shortcomings of the above prior art, a model decompression test method for aeration and corrosion reduction is proposed, which can solve the problem of dissimilarity in the ventilation volume of aeration facilities in decompression tests
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Embodiment 1
[0049] This embodiment is a decompression test method of aeration corrosion reduction model, such as image 3 As shown, the device for the decompression test of the aerated corrosion reduction model includes a decompression box 7, a vacuum pump 9 and an aerated corrosion reduction model equipped with aeration facilities. The vacuum pump 9 is connected to the decompression box 7 through the vacuum pump exhaust pipe 8, and The gas corrosion reduction model is located in the decompression box 7, and the air aeration facility is connected with the ventilation pipe 4; the ventilation pipe 4 of the aeration facility is connected to the outside of the decompression box 7, and the air is fed from the normal pressure environment, but the aeration and corrosion reduction The model is still in the vacuum environment of the decompression box, and the vacuum degree of the decompression box is the theoretical value of the traditional decompression test. The ventilation pipe 4 is provided wi...
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The invention belongs to the technical field of the prevention of cavitation damage and destruction of high-flowrate outlet structures, and relates to a method of a decompression test of an air entrainment and cavitation alleviation model. A device of the decompression test of the air entrainment and cavitation alleviation model comprises a decompression tank, a vacuum pump, and the air entrainment and cavitation alleviation model which is provided with an air entrainment facility, wherein the vacuum pump is connected with the decompression tank through a vacuum pumping pipeline of the vacuum pump; the air entrainment and cavitation alleviation model is positioned in the decompression tank; the air entrainment facility is connected with a ventilation pipe; the ventilation pipe of the air entrainment facility is led to the outer part of the decompression tank; air is sucked from an ordinary pressure environment, but the air entrainment and cavitation alleviation model is still in a vacuum environment of the decompression tank; and the vacuum degree of the decompression tank is equal to a theoretical value of a traditional decompression test. By adopting the method, the problem that the ventilatory capacity of the model of the decompression test is dissimilar to that of a prototype is solved, the air entrainment and cavitation alleviation effect of the prototype engineering is scientifically reflected, and the method has an important reference value for the design and the optimization of air entrainment and cavitation alleviation measures of the high-flowrate outlet structures.
Description
technical field [0001] The invention belongs to the technical field of preventing cavitation damage of high-flow rate drainage structures, and relates to a model decompression test method for aeration and corrosion reduction. Background technique [0002] With the improvement of dam engineering technology and the rapid development of my country's water conservancy and hydropower construction, the construction of high dams in my country has developed from the initial level of nearly 100m to the stage of 300m, and the flow rate of flood discharge has correspondingly developed from the early 20-30m / s to the current 50m / s. s, the resulting high-speed water flow problem is becoming more and more prominent, and the possibility of severe cavitation damage to drainage structures is gradually increasing, which seriously threatens the safe operation of the project, so it has attracted the attention of engineering circles and researchers. [0003] At present, for the protection of cavit...
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Inventor 胡亚安严秀俊阮仕平薛淑胡皓
Owner NANJING HYDRAULIC RES INST