Modeling and flow control method for high-speed compressor under variable height

A technology of flow control and compressor, applied in engine control, pump control, mechanical equipment, etc.

Inactive Publication Date: 2018-06-05
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The centrifugal compressor model in the ground environment is no longer applicable to the working condition of variable height. The establishment of the centrifugal compressor

Method used

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  • Modeling and flow control method for high-speed compressor under variable height
  • Modeling and flow control method for high-speed compressor under variable height
  • Modeling and flow control method for high-speed compressor under variable height

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Embodiment Construction

[0061] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0062] The basic idea of ​​the present invention is to propose a modeling and flow control method for high-speed centrifugal compressors at variable heights, aiming at the impact of changes in the working height of the high-speed centrifugal compressor used in fuel cells on the compressor model and flow control. The model of centrifugal compressor at variable height is established, and the smooth flow control of centrifugal compressor at variable height is realized.

[0063] The compressor is an ultra-high-speed centrifugal compressor for fuel cell gas supply systems. The motor type is a brushless DC motor with a maximum speed of 280,000r / min, a rated power of 1kW, an output pressure ratio of 1.7, and a maximum output flow rate of 0.024g / min. s.

[0064] The compressor works in a state of variable altitude. As the altitude changes, the air pressure, air humidity...

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Abstract

The invention relates to a modeling and flow control method for a high-speed compressor under a variable height. For the influence of changes of the working height of a high-speed centrifugal compressor for a fuel cell on a compressor model and the flow control, the modeling and flow control method for the high-speed centrifugal compressor under the variable height is provided. First an inlet airpressure and inlet air density model of the centrifugal compressor under the variable height is established, and static and dynamic models of the centrifugal compressor under variable height conditions are established. Based on the static and dynamic models of the compressor, the super-twisting sliding mode principle is adopted to perform smooth tracking control on the compressor flow. The modeling and flow control method has the advantages that in the modeling method for the centrifugal compressor under the variable height, the influence of height changes on the centrifugal compressor model is taken into account; through the flow control method under the variable height, the smooth control of the compressor flow is achieved, and the influence of height changes on the flow fluctuations isreduced.

Description

technical field [0001] The invention belongs to a modeling and flow control method of a compressor, and relates to a modeling and flow control method of a high-speed compressor under variable height. Background technique [0002] Proton exchange membrane fuel cells use the electrochemical reaction of hydrogen and oxygen to generate electricity, which has the advantages of zero emissions, low noise and high efficiency, and has good development prospects in new energy vehicles, aerospace and other fields. Airplanes and high-altitude airships powered by proton exchange membrane fuel cells have the advantages of low operating temperature, easy maintenance, and environmental protection. The largest energy consumption subsystem inside the battery, the performance of the air supply subsystem directly affects the efficiency of the fuel cell. [0003] High-speed centrifugal air compressors are referred to as high-speed centrifugal compressors for short. They have the advantages of l...

Claims

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Application Information

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IPC IPC(8): F04D27/00
CPCF04D27/00F05D2270/121F05D2270/306F05D2270/71
Inventor 赵冬冬华志广谭博李飞王西坡皇甫宜耿
Owner NORTHWESTERN POLYTECHNICAL UNIV
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