Cavitation potential calculation method considering time effect and application
A calculation method and time-effect technology, which is applied in the direction of calculation, data processing application, computer-aided design, etc., can solve the problem of inability to accurately calculate the number of cavitation, pressure sensors and flow rate sensors cannot be arranged at the same measuring point, and cavitation potential cannot be accurately considered effects and other issues, to achieve the effect of clear physical meaning
Pending Publication Date: 2022-05-06
CHANGJIANG SURVEY PLANNING DESIGN & RES
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[0008] (2) The required pressure P and flow velocity V in the formula are time-averaged parameters, and the influence of different pressure P and flow velocity V on the cavitation potential cannot be accurately considered;
[0010] (4) In engineering monitoring, the pressure sensor and flow rate sensor cannot be arranged at the same measuring point, and the cavitation number cannot be accurately calculated
[0011] It can be seen that the above shortcomings limit the effective estimation of the cavitation potential of water flow in hydraulic simulation and monitoring
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[0042] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the preferred embodiments of the present invention will be described below in conjunction with specific examples, but it should be understood that the accompanying drawings are for illustrative purposes only, and cannot be interpreted as an explanation of this patent. Restrictions; In order to better illustrate this embodiment, some parts in the drawings will be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, some known structures and descriptions in the drawings Omissions are understandable. The positional relationship described in the drawings is for illustrative purposes only, and should not be construed as a limitation on this patent.
[0043] The present invention provides a calculation method of cavitation potential considering time effect. In this method, the calculation formula of cavi...
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According to the cavitation potential calculation method considering the time effect and the application of the cavitation potential calculation method in engineering simulation and engineering monitoring, the calculation method starts from the cavitation generation mechanism, the key point is put on the local pressure intensity of water flow, and the physical significance is very clear; according to the calculation method, the influence of the change of pressure along with time fluctuation is considered, namely, the time effect is considered; the standards for different hydraulic structures are consistent, and the critical cavitation numbers of different hydraulic structures do not need to be measured through tests; in addition, the calculation method can be conveniently applied to engineering simulation, decompression hydraulic models and engineering monitoring.
Description
technical field [0001] The invention relates to the technical field of water conservancy and hydropower engineering design and operation monitoring, in particular to a cavitation potential calculation method and its application considering the time effect. Background technique [0002] In water conservancy and hydropower projects, cavitation cavitation is a relatively common phenomenon that needs to be avoided and controlled as much as possible. Cavitation refers to the phenomenon of cavitation in the water body when the local pressure is lower than the saturated vapor pressure in the moving water flow. When these cavitation bubbles move to the high-pressure area with the water flow, they will collapse instantly, forming micro-jet shock waves, and producing Gpa(10 9 Pa) level of impact pressure, this huge impact pressure will produce denudation damage on the surface of the structure (metal, concrete, etc.), that is, cavitation erosion. From a thermodynamic point of view, t...
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IPC IPC(8): G06F30/28G06Q10/06G06Q50/06G06F113/08G06F119/14G06F119/08
CPCG06F30/28G06Q10/0635G06Q50/06G06F2113/08G06F2119/14G06F2119/08
Inventor 董宗师蔡芳熊堃贺牧侠李麒
Owner CHANGJIANG SURVEY PLANNING DESIGN & RES