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A one-dimensional pneumatic design method for a helium compressor

A design method and compressor technology, applied in the directions of calculation, instrument, geometric CAD, etc., can solve the problem of not being able to meet the efficiency requirements of helium compressors, and achieve the effect of improving efficiency

Active Publication Date: 2019-03-08
中国船舶重工集团公司第七0三研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the existing one-dimensional aerodynamic design method of helium gas compressor cannot meet the efficiency requirements of helium gas compressor design

Method used

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  • A one-dimensional pneumatic design method for a helium compressor
  • A one-dimensional pneumatic design method for a helium compressor
  • A one-dimensional pneumatic design method for a helium compressor

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Experimental program
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specific Embodiment approach 1

[0013] Specific implementation mode one: as figure 1 As shown, the one-dimensional aerodynamic design method of a helium gas compressor described in this embodiment includes the following steps:

[0014] Step 1. Utilize the flow pressure ratio of the helium compressor Calculate the sum of all levels of adiabatic work of the helium compressor and distribute it reasonably;

[0015] Step 2: Determine the number of stages of the helium compressor, calculate the temperature rise of each level of the helium compressor, the total temperature of the helium before each level, the pressure ratio of each level and the total pressure before each level, and calculate the total increase of the helium compressor Pressure ratio, adiabatic efficiency and power consumption;

[0016] Step 3: Calculate the first-stage geometric dimensions and the last-stage geometric dimensions of the helium gas compressor along the mean diameter;

[0017] Step 4: Obtain the flow size of the helium compressor...

specific Embodiment approach 2

[0018] Specific implementation mode two: the difference between this implementation mode and specific implementation mode one is: the specific process of the step one is:

[0019] The pressure of the airflow when the airflow passes through the beginning of the inlet section is P a * , the airflow pressure when the airflow passes through the end of the outlet section is P k * , according to P a * and P k * Calculating the flow-to-flow pressure ratio of a helium compressor

[0020]

[0021] use Calculation of the adiabatic work H of the helium compressor 0 :

[0022]

[0023] Among them, H 0 is the adiabatic work of the helium compressor, k is the adiabatic index, is the total temperature of the intake air, and R is the gas constant;

[0024] Then the sum of the adiabatic work of all stages of the helium compressor ∑h 0 for:

[0025]

[0026] Among them, η i is the level average efficiency, is the adiabatic efficiency of the helium compressor.

specific Embodiment approach 3

[0027] Specific implementation mode three: the difference between this implementation mode and specific implementation mode two is: the specific process of said step two is:

[0028] Determine the number of stages of the helium compressor, and then calculate the pneumatic parameters of each stage:

[0029] Helium Compressor's i-Stage Heating for:

[0030]

[0031] Where: h s,i is the i-level adiabatic processing capacity, η s,i is the adiabatic efficiency of the i-th stage, and i is the number of stages;

[0032] The total temperature of helium before the i-th stage of the helium compressor is, where the first level is given according to the design requirements:

[0033]

[0034] The i-th stage pressure ratio of the helium gas compressor for:

[0035]

[0036] The total pressure before the i-th stage of the helium gas compressor is , where the first level is given according to the design requirements:

[0037]

[0038] In the formula: Indicates the t...

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Abstract

The invention discloses a one-dimensional pneumatic design method for a helium compressor, and belongs to the technical field of pneumatic design of compressors. The problem that the pneumatic designof an existing helium compressor cannot meet the requirement for the design efficiency of the helium compressor is solved. According to the invention, the sum of the adiabatic work amounts of all stages of the helium compressor is reasonably designed and reasonably distributed; the temperature rise of each stage of a helium compressor, the total helium temperature before each stage, the pressure ratio of each stage and the front total pressure of each stage are calculated to obtain the total supercharging ratio, the adiabatic power and the power consumption power of the helium compressor, thefirst-stage geometric dimension and the last-stage geometric dimension of the helium compressor along the uniform-diameter pneumatic direction are determined, and further the through-flow dimension ofthe helium compressor is solved, so that the design of the one-dimensional pneumatic direction of the helium compressor is completed. Compared with the prior art, the method has the advantages that the efficiency of the helium compressor designed by the aid of the method can be improved by 2%-3%, and the method can be applied to the technical field of helium compressor pneumatic design.

Description

technical field [0001] The invention belongs to the technical field of aerodynamic design of a compressor, and in particular relates to a one-dimensional aerodynamic design method of a helium compressor. Background technique [0002] The general principle of helium compressor design is to ensure that the flow rate, pressure ratio and efficiency of the compressor meet the design requirements at the specified speed, so how to reasonably select the aerodynamic parameters of the helium compressor at all levels and ensure that the helium compressor has a Stable working range is an important content in the design work of helium gas compressor. [0003] To consider the stable working range of the helium compressor itself, the surge margin is the main measure. Specifically, in the design of aerodynamic parameters of helium compressors, it is necessary to monitor the stall flow indicators of each compression stage component in each aerodynamic design scheme, and the key is to ration...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/17Y02T90/00
Inventor 于景磊王廷刘震王琦洪青松张舟汪作心
Owner 中国船舶重工集团公司第七0三研究所
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