SU646238A1 - Method of investigating destructability by cavitation - Google Patents

Description

radiation and destructive activity of K1avitation. The purpose of the invention is to improve the accuracy of determining the destructive cavitation ability. This chain is achieved by affecting the cavitation flow. The nocTOHHifbiM magnetic field and with the help of electrodes introduced into the cavitation flow, measure the power of the current induced on them, the magnitude of which is judged by the destructive ability of cavitation,. When a magnetic field is crossed by a highly ionized cavitation flow, electrodes in a contact with this flow induce an electric current, the power P of which is proportional to the destructive ability of cavitation determined by the loss; re sample weights. So, with increasing P, the weight loss of materials increases. The power curve of the current P is removed for different stages of cavitation, the extreme value of which when, indicates a cavitation mode having a maximum destructive power. cavitation mode is determined by the relative characteristics of the dGTP where e ibcr are the cavitation parameters of an arbitrary stage and at the time of its occurrence, respectively, PH-Pvt-b

R

Here, pf.Flower and flow velocity of the fluid in the flow incursion section to the cavitation pathogen R. (6) pressure of saturating vapors of the fluid nfffl corresponding to the temperature; Q density of fluid

Fig, 1 presents a diagram of the device that implements the method; Fig. 2 shows the curve of the dependence of the power P of the induced current on the cavitation mode. The device contains a magnetic cavitation chamber or a section of pipeline 1 in which the destroying ability of cavitation is controlled, an electromagnet 2 covering the pipeline section from two ctojpoa, and collector electrodes 3 p 4 wattmeter

The method is implemented as follows. Several modes are set.

Formulas

the invention

The method of determining the destructive cavitation cavitation by measuring the physical parameters of the cavitation flow, characterized in that, in order to increase the accuracy of the determination, the power of the induced magnetic field is controlled by a controlled magnetic field HQTOK and measured by the electrodes introduced into the automatic flow, the power induced on them is measured current, the magnitude of which is judged on the destructive ability of cavitation

Sources of information taken in attention during e &

i.Movsson Z.M.pitting (3 pse of Metals IT fide by Covflatiof Tfan & act ASM B, VQE.59, №5.

2. USSR author's certificate No. 145038, Cl, Q Ol B 17 / OO, 1962. 8.4 cavitation b / c c P at a certain flow rate Yj For each mode, the power P of the current induced by cavitation and the intensity (loss of the sample by loss of its weight AQ per unit time 1 mg / min. The tests were carried out at a constant water temperature t. The data are tabulated. Experimental-Gnalay data showed that the values of the power P induced by the current cavitation and the intensity of destruction of the application under conditions of different cavitation modes. l determine the destructive ability of cavitation by the proposed method is 3-4 times lower than the method of fixation of acoustic radiation.

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