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Blade top air injection stability controller for axial flow compression system

A technology of stability control and blade top injection, which is applied in the direction of jet propulsion devices, machines/engines, etc., and can solve the problems of difficult control system and short time

Active Publication Date: 2015-01-07
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these two types of stall precursors have the characteristics of short time, randomness and suddenness. In practical application, the control system is difficult to realize, which prompts people to start to re-understand the stall precursors

Method used

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  • Blade top air injection stability controller for axial flow compression system
  • Blade top air injection stability controller for axial flow compression system
  • Blade top air injection stability controller for axial flow compression system

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Embodiment Construction

[0043] A controller of the present invention for blade tip jet stability of an axial flow compression system, comprising a processor, eight-way high-speed analog signal acquisition module, six-way analog signal acquisition module, frequency signal acquisition module, communication module, pulse output module, eight-way High-response proportional solenoid valve drive module and power module; multiple steady-state pressure sensors are evenly distributed on the inlet and outlet walls of the axial flow compression system, and multiple dynamic pressure sensors are evenly distributed on the wall circumference of the casing wall on the top of the moving blade of the compression system The sensor, the steady-state pressure sensor is electrically connected to the six-way analog signal acquisition module, and the dynamic pressure sensor is electrically connected to the eight-way high-speed analog signal acquisition module. The two data acquisition modules are controlled by the on-chip A / D...

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Abstract

The invention discloses a blade top air injection stability controller for an axial flow compression system. The controller comprises a processor, an eight-way high-speed analog signal acquisition module, a six-way analog signal acquisition module, a frequency signal acquisition module, a communication module, a pulse output module, an eight-way high-frequency-response proportional electromagnetic valve driving module and a power module. A plurality of sensors are symmetrically arranged on the wall faces of a casing and used for detecting front stall omen signals during operation of the axial flow compression system by adoption of signal analysis means. The controller transmits displacement signals to the high-frequency-response proportional electromagnetic valve driving module to reasonably control openness of a high-frequency-response proportional electromagnetic valve so as to control air injection volume in real time, and the blade top air injection volume is gradually increased along with operating conditions approaching to a stall point, so that energy is saved while improvement of instability margin can be effectively realized. The controller can control air injection volume in real time to enable the axial flow compression system to have wider flow and pressure ratio operating range on the premise of energy conservation.

Description

technical field [0001] The invention relates to the technical field of gas turbines, and relates to a controller used for the stability control of blade top injection in an axial flow compression system. Background technique [0002] Since Day first used jets to interfere with the flow field of the compression system in the early days, jet technology has been valued by various research institutions. The structure of nozzles for active jets and passive jets, the jet angle, and the size of the jet volume have a large impact on flow instability. A lot of research has been done on the impact of the increase in speed. For the entire compressor system, the tip jet can be regarded as an external excitation source. Under the action of this excitation, some physical phenomena of the compression system itself may be amplified or suppressed. Judging from the results of jet energy expansion, it is likely that some disturbances that induce flow instability are suppressed, thereby delayin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02K1/15
Inventor 童志庭李继超林峰聂超群
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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