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A Wind Tunnel Static Vane Adjustable Axial Flow Compressor Anti-surge System Using Interpolation Operation

An interpolation operation, compressor unit technology, applied in mechanical equipment, machines/engines, non-variable-capacity pumps, etc., can solve the problems of heavy tasks, short debugging time and high debugging costs in continuous wind tunnels, and ensure safe operation. , the effect of expanding the angle range of the stator blade and expanding the angle range of the stator blade

Active Publication Date: 2019-03-29
AVIC SHENYANG AERODYNAMICS RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the tight commissioning time, heavy tasks and huge commissioning costs of the continuous wind tunnel, usually only the surge line of the common vane angle of the axial flow compressor unit is tested; in order to ensure the safety of the unit, the unit can only be tested at the surge line operating at a vane angle of

Method used

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  • A Wind Tunnel Static Vane Adjustable Axial Flow Compressor Anti-surge System Using Interpolation Operation
  • A Wind Tunnel Static Vane Adjustable Axial Flow Compressor Anti-surge System Using Interpolation Operation
  • A Wind Tunnel Static Vane Adjustable Axial Flow Compressor Anti-surge System Using Interpolation Operation

Examples

Experimental program
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Effect test

Embodiment 1

[0034] An anti-surge system for an axial-flow compressor with adjustable vanes in a wind tunnel using interpolation operations, including a central controller, an anti-surge control unit, a vane adjustment mechanism, a monitoring unit, and a speed control unit; the monitoring unit monitors the flow rate of the compressor unit, Stator vane angle, pressure ratio and temperature, the speed control unit controls the speed of the compressor unit;

[0035] Such as image 3 As shown, the anti-surge control unit is used to control the valve. The valve is set on the bypass circuit between the inlet and outlet of the compressor unit. When the compressor unit appears or is close to the anti-surge warning line, the valve can be quickly opened to increase the inlet of the unit. flow, reduce the pressure ratio of the inlet and outlet of the compressor unit;

[0036] Such as Figure 5-7 As shown, the vane adjustment mechanism includes a vane adjustment cylinder, a rack, a servo motor, a he...

Embodiment 2

[0054] In the adjustment of the surge boundary of the axial flow compressor with adjustable vane in the continuous wind tunnel, according to the angle range of the design vane and the commonly used angle value, an appropriate angle interval is selected to determine the vane angle group to be tested for the surge boundary. The inlet flow rate of the axial flow compressor is changed by using the wind tunnel adjustment mechanism, and the flow-pressure ratio corresponding to the surge operating point at different speeds at a certain vane angle is obtained. The corresponding surge boundary can be obtained by connecting the surge operating points at the same vane angle, and the corresponding anti-surge warning line can be obtained after a certain margin is reserved for the surge boundary. After completing the surge boundary test for all determined vane angle groups, for a certain unmeasured vane angle value, the central controller judges and uses the flow-pressure ratio arrays corres...

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Abstract

The invention discloses a wind tunnel stationary blade adjustable axial flow compressor surge preventing system capable of adopting interpolation operation. The wind tunnel stationary blade adjustableaxial flow compressor surge preventing system comprises a central controller, a surge preventing control unit, a stationary blade adjusting mechanism, a monitoring unit and a rotation speed control unit. The system is characterized in that surge line data of which angles are not measured is acquired according to surge line data of which stationary blade angles are measured through interpolation operation, surge preventing warning lines are set, and a unit is allowed to operate when the stationary blade angles of the surge line data are not actually measured; the stable operation angle range of the unit is greatly expanded under the preconditions that debugging work and cost are not increased; and the operation working condition of the axial flow compressor is monitored in real time, the surge preventing warning lines are automatically switched, the surge preventing warning lines are subjected to temperature correction according to the operation working condition of the unit, and the unit stably operates in the surge preventing warning lines. The wind tunnel stationary blade adjustable axial flow compressor surge preventing system adopting interpolation operation can be further applied to other industrial occasions of which the stationary blade angles frequently change.

Description

technical field [0001] The invention belongs to the technical field of aeronautical aerodynamic wind tunnel tests, and in particular relates to an anti-surge system for an axial-flow compressor with adjustable vanes in a wind tunnel using interpolation calculations. Background technique [0002] As a method widely used in aerodynamic research, wind tunnel test provides the necessary guarantee for the development of aviation, aerospace, railway transportation and other fields. The axial flow compressor is the key equipment for continuous wind tunnel to control the operating conditions of the wind tunnel. Surge is an inherent characteristic of axial-flow compressors. In order to avoid surge conditions in axial-flow compressors, it is necessary to monitor the operating conditions of the unit in real time to ensure that the operating conditions of the unit are within the stable operating range and away from the surge boundary. Avoid unit damage. Due to the numerous operating c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D27/02
Inventor 许岭松王军许靖张然
Owner AVIC SHENYANG AERODYNAMICS RES INST
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