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Method for predicting critical speed of low temperature liquid expander rotor under consideration of influence of radial fluid force

A low-temperature liquid, critical speed technology, applied in computer-aided design, special data processing applications, instruments, etc., can solve unreported problems and achieve the effects of ensuring stable operation, avoiding resonance, and improving rotor design

Active Publication Date: 2018-07-17
XI AN JIAOTONG UNIV
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Problems solved by technology

[0006] Considering the influence of radial fluid force on the critical speed prediction method of the rotor of the cryogenic liquid expander, there is no report in the current published literature at home and abroad.

Method used

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  • Method for predicting critical speed of low temperature liquid expander rotor under consideration of influence of radial fluid force
  • Method for predicting critical speed of low temperature liquid expander rotor under consideration of influence of radial fluid force
  • Method for predicting critical speed of low temperature liquid expander rotor under consideration of influence of radial fluid force

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Embodiment Construction

[0047] The present invention is described in further detail below in conjunction with accompanying drawing:

[0048] refer to figure 1 , the method for predicting the critical rotational speed of the cryogenic liquid expander rotor considering the influence of the radial fluid force of the present invention includes the simulation of the transient flow field of the cryogenic liquid expander around the circumference of the cryogenic liquid expander considering the thermodynamic effect of the cryogenic fluid, the radial direction of the impeller of the cryogenic liquid expander Calculation of fluid force, evaluation of the impact of radial fluid force on the critical speed of the cryogenic liquid expander impeller, and prediction of the critical speed of the cryogenic liquid expander rotor considering the influence of radial fluid force.

[0049] 1. The simulation of the transient flow field around the cryogenic liquid expander considering the thermodynamic effect of the cryogen...

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Abstract

The invention discloses a method for predicting the critical speed of a low temperature liquid expander rotor under the consideration of influence of radial fluid force. The method includes the stepsof simulation of a circumferential transient flow field of a low temperature liquid expander under the consideration of the thermodynamic effect of low temperature fluid, calculation of the radial fluid force of a low temperature liquid expander impeller, evaluation of the influence of the radial fluid force of the low temperature liquid expander impeller on the critical speed, and prediction of the critical speed of the low temperature liquid expander rotor under the consideration of the influence of the radial fluid force. The method makes a low temperature liquid expander unit and a low temperature system operate stably.

Description

technical field [0001] The invention belongs to the technical fields of low-temperature air separation and low-temperature liquefaction, and relates to a method for predicting the critical speed of a low-temperature liquid expander rotor considering the influence of radial fluid force. Background technique [0002] The cryogenic liquid expander is the key energy-saving equipment for cryogenic air separation and cryogenic liquefaction plants. It is used to replace the traditional high-pressure liquid throttle valve. It can recycle throttling pressure head to generate electricity (or drive power equipment) while reducing pressure and throttling. , while suppressing the temperature rise of the low-temperature system, resulting in significant energy saving and consumption reduction benefits. As a high-speed rotating impeller, the cryogenic liquid expander is similar to conventional impellers. The rotor dynamics problem is very important, which directly affects the stable operati...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/17G06F30/20G06F2119/06
Inventor 孙金菊袁宁波宋鹏
Owner XI AN JIAOTONG UNIV
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