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Effective control method for vortex cavitation flowing in low-temperature liquid expander

A low-temperature liquid and control method technology, applied in the direction of machines/engines, mechanical equipment, engine components, etc., can solve the problems of undiscovered public information, etc., and achieve the goal of suppressing induced cavitation, improving performance and operating reliability, and avoiding vibration Effect

Active Publication Date: 2018-09-21
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
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Problems solved by technology

At present, in terms of domestic and foreign scope, no public information on this aspect has been found.

Method used

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  • Effective control method for vortex cavitation flowing in low-temperature liquid expander
  • Effective control method for vortex cavitation flowing in low-temperature liquid expander
  • Effective control method for vortex cavitation flowing in low-temperature liquid expander

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Embodiment Construction

[0033] The present invention is described in further detail below in conjunction with accompanying drawing:

[0034] refer to figure 1 The effective control method of the vortex cavitation flow in the cryogenic liquid expander of the present invention includes the research on the vortex cavitation mechanism of the cryogenic liquid expander considering the thermodynamic effect of the cryogenic fluid, the sensitivity of the impeller geometric parameters of the vortex cavitation flow in the cryogenic liquid expander characteristic analysis, characterization of complex vortex cavitation flow in cryogenic liquid expander, construction of flow field optimization objective function and flow field optimization control variables for the purpose of controlling vortex cavitation flow, and parallel optimization control problems of vortex cavitation flow solve.

[0035] 1. The specific process of the study on the vortex cavitation mechanism of the cryogenic liquid expander considering the...

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Abstract

The invention discloses an effective control method for vortex cavitation flowing in a low-temperature liquid expander. The effective control method comprises the steps of researching of the low-temperature liquid expander vortex cavitation mechanism considering the low-temperature fluid thermal-mechanical effect, impeller geometrical parameter sensitivity analysis for vortex cavitation flowing inthe low-temperature liquid expander, characterization presentation of complex vortex cavitation flowing in the low-temperature liquid expander, construction of a flow field optimizing objective function and flow field optimizing control variables with the purpose of controlling vortex cavitation flowing, and parallel solving of a vortex cavitation flowing optimizing control problem. According tothe effective control method, the performance and operation reliability of the low-temperature liquid expander can be effectively improved.

Description

technical field [0001] The invention belongs to the fields of low-temperature air separation and low-temperature liquefaction, and relates to an effective control method for vortex cavitation flow in a low-temperature liquid expander. Background technique [0002] As a kind of hydraulic machinery, cryogenic liquid expander is similar to traditional hydraulic (or hydraulic) machinery, and cavitation inevitably occurs. The collapse of cavitation bubbles will generate extremely high local pressure, which will cause a great impact on the surface material of the structure, resulting in cavitation corrosion damage; it will also induce unit vibration, threatening the stable operation of the liquid expander and even the low temperature system. Therefore, the effective suppression of the vortex cavitation flow in cryogenic liquid expanders is of great significance. [0003] Cavitation phenomenon refers to the phenomenon that the partial pressure of the liquid is lower than the satur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D21/00
CPCF01D21/00
Inventor 宋鹏孙金菊霍长江
Owner XI AN JIAOTONG UNIV
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