CN1464179A - Process and apparatus for expanding multi-stage axial flow gas compressor stable operation zone - Google Patents
Process and apparatus for expanding multi-stage axial flow gas compressor stable operation zone Download PDFInfo
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Abstract
The present invention is the method of expanding the stable operation region of multi-stage axial-flow air compressor based on the feedback control principle. During the running of the multi-stage axial-flow air compressor, the dynamic pressure signal is collected, amplified, low-pass filtered and A/D converted and treated in a DSP for the synchronous analysis of varying characteristic of the first order harmonic wave in premonitory flow instability signal. According to the set threshold, premonitory flow instability signal inside the system is collected and control signal is output and transmitted via D/A converter to several mini electromagnetic control valves and one HF pneumatic conveyance controlling valve to control the mini nozzles to jet high pressure airflow altering the non-stationary characteristic of the airflow inside the movable blade channel. The said process can postpone stalling and expand stable operation region.
Description
Technical field
The present invention relates to a kind of method of widening gas compressor stable operation zone, refer in particular to the method for a kind of expanding multi-stage, axial flow gas compressor stable operation zone.The invention still further relates to the device of the method that realizes this expanding multi-stage, axial flow gas compressor stable operation zone.
Background technique
Axial flow compressor is used in aeroengine and the industrial production in a large number.When multistage, axial flow compressor close on the stall border, variation has taken place in the non-linear coupling mechanism of inner suction surface boundary layer flow segregation phenomenon of blade path and stability couplings at different levels, under the inducing of system or local flow unstability factor, cause gas compressor to rotate the stall phenomenon, just, stall group appears in blade path inside, this class rotating stall group is with 60 40 percent to percent magnitude counter-rotating of rotor speed, the destruction that causes the inner proper flow rule of blade path.The destructiveness that is produced is mainly reflected in pressure ratio and sharply descends, and gas compressor low-frequency vibration phenomenon is serious.
Center on the mobile unstable phenomenon (surge and rotating stall) in the above-mentioned gas compressor running, carried out many ground-breaking research work over past ten years in the world.But present controlling method all adopts passive control mode, i.e. the mode that final stage venting and casing are handled adopts on aeroengine and reduces fuel injection quantity, thereby reduces the mode of motor operating load.But this mode has reduced the operational efficiency of unit on the one hand, also has influence on the stable operation of system on the other hand, will cause system's generation surge when serious, causes catastrophic failure.From the application prospect of present rotating stall active control technology, because the limitation of the time variation of the high frequency sound of the robustness of its control mechanism, actuator and feedback control model has hindered the practical application of this technology on gas compressor.
Summary of the invention
The purpose of this invention is to provide is not a kind ofly influencing the range of flow of widening its stable operation under the situation of multistage, axial flow compressor machine operational efficiency, the method for expanding multi-stage, axial flow gas compressor stable operation zone.Another object of the present invention provides a kind of device that is used to realize the method for this expanding multi-stage, axial flow gas compressor stable operation zone.
For achieving the above object, the invention provides the method for a kind of expanding multi-stage, axial flow gas compressor stable operation zone, may further comprise the steps:
At first, dynamic pressure signal when the high frequency sound dynamic pressure transducer at the casing place of, axial flow compressor at different levels movable vanes top casing place multistage by laying respectively at and afterbody stator blade trailing edge is gathered the gas compressor operation, a high frequency sound dynamic pressure transducer is installed at each casing place;
Then above-mentioned signal is sent to a signal preamplifier respectively, simulates amplification, the maximum pressure value when Amplifier Gain is selected with gas compressor stable operation is the upper limit;
The signal of signal preamplifier output with high-frequency signal, white noise signal and control circuit self oscillations signal cutout and isolation, obtains to gather the low frequency pulsating feature in the signal by low-pass filtering module then;
The signal of low-pass filtering module output passes through analog-digital converter more then, and analog-signal transitions is become numerical signal;
The variation characteristic of the above-mentioned numerical signal input and mobile unstability tendency signal one order harmonics of numerical signal processor DSP (Digital Signal Processor) Synchronization Analysis gas compressor operating conditions of high frequency sound dynamic pressure transducer equal number, and finish the power spectrum of gathering signal and search for, if do not find to meet the requirement that preestablishes an order harmonic frequency amplitude, then do not send control signal, proceed the collection of the dynamic signal of gas compressor; After if the power spectrum search finishes, find to meet the requirement that preestablishes an order harmonic frequency amplitude, then according to predefined threshold values, send the control output signal;
This control output signal becomes simulation control output signal again by digital to analog converter with the numerical control signal transition;
This simulation control output signal is sent to respectively with the same number of little discharge rate solenoid electric valve of high frequency sound dynamic pressure transducer and a high frequency sound strength and carries control valve; Send high-pressure pulsating gas behind this high frequency sound strength conveying control valve acknowledge(ment) signal and flow to surge tank; This surge tank is set the pressure stable value according to the requirement of operating conditions, and high pressure draught is transported to little discharge rate solenoid electric valve;
At last by this slightly the control of discharge rate solenoid electric valve be installed in the micro nozzle at first order movable vane leading edge place, by control stream pressure and speed, make it to eject the high pressure draught of micrometeor, thereby change the non-permanent feature of movable vane channel interior gas flow, widen gas compressor stable operation zone.
Above-mentioned expanding multi-stage, the method for axial flow gas compressor stable operation zone, the CLV ceiling limit value of wherein said signal preamplifier gain are chosen on 4.5 volts the magnitude.
Above-mentioned expanding multi-stage, the method for axial flow gas compressor stable operation zone, wherein said digital to analog converter are 16 figure place weighted-voltage D/A converters.
Above-mentioned expanding multi-stage, the method for axial flow gas compressor stable operation zone, wherein said numerical signal processor DSP is the FFT Arithmetic Processing Chip.
Above-mentioned expanding multi-stage, the method for axial flow gas compressor stable operation zone, the flow of the wherein said high pressure draught that ejects micrometeor is less than the millesimal scope of gas compressor design discharge.
A kind of device that is used to realize the method for expanding multi-stage of the present invention, axial flow gas compressor stable operation zone comprises:
A plurality of high frequency sound dynamic pressure transducers, a casing place that is positioned at multi stage axial flow compressor afterbody stator blade trailing edge, all the other install one at each casing place, movable vane top;
A signal preamplifier is connected with these high frequency sound dynamic pressure transducer output terminals;
A low-pass filtering module is connected with the output terminal of this signal preamplifier;
An analog-digital converter is connected with the output terminal of this low-pass filtering module;
A plurality of numerical signal processor DSP are connected with the output terminal of this analog-digital converter respectively in parallel, and the number of numerical signal processor is identical with high frequency sound dynamic pressure transducer number;
A digital to analog converter is connected jointly with the output terminal of above-mentioned these numerical signal processors;
A high frequency sound strength is carried control valve, electrically connects this digital to analog converter, in order to the flow of gas in the control tracheae;
One root timber matter is that stainless tracheae is communicated with multistage, axial flow compressor, this high frequency sound strength is installed carries control valve, and that the air pipe inlet place is positioned at is multistage, the downstream of last row's stator blade of axial flow compressor;
A surge tank links to each other with the outlet port of this tracheae, and drawing a plurality of materials is stainless bronchus, and the bronchus number is identical with high frequency sound dynamic pressure transducer number;
A plurality of little discharge rate solenoid electric valves electrically connect this digital to analog converter, are installed in respectively on these bronchuses, and each bronchus is installed one;
A plurality of micro nozzles are installed in these bronchial outlet ports respectively, are positioned at multi stage axial flow compressor first order movable vane leading edge place.
The device of the method for above-mentioned expanding multi-stage, axial flow gas compressor stable operation zone, wherein said digital to analog converter are 16 figure place weighted-voltage D/A converters.
The device of the method for above-mentioned expanding multi-stage, axial flow gas compressor stable operation zone, wherein said numerical signal processor DSP is the FFT Arithmetic Processing Chip.
By the method for above-mentioned expanding multi-stage, axial flow gas compressor stable operation zone and realize this expanding multi-stage, axial flow gas compressor stable operation zone method device as can be seen, the present invention has following advantage: utilize in multistage, axial flow compressor movable vane import leading edge and arrange the controllable air flow injection apparatus, spray the micrometeor high pressure draught and widen stability of a system operation area.Change the UNSTEADY FLOW feature (near the regularity of distribution of the dynamic loading separation trend in the flowing law of movable vane top leakage vortex, movable vane suction surface boundary layer, the movable vane top) of movable vane channel interior by the dynamic effect of little discharge rate air-flow, inhibition system and local flow unstability disturbance factor increase progressively trend, widen the system stability zone and improve the gas compressor pressure ratio.Be exactly in brief: on the basis that does not change systematic steady state characteristic, gas compressor operational efficiency, gas compressor main structural components, widened stable operation zone multistage, axial flow compressor.
Description of drawings
Fig. 1 is the structural representation of apparatus of the present invention;
Fig. 2 is the control flow chart of the inventive method.
Embodiment
Be clearer description the present invention, present embodiment is an example with the level Four axial flow compressor.
As shown in Figure 1, 2, provide power by motor 20, level Four axial flow compressor 5 sucks gas, and flow through movable vane 6 and stator blade 6a gas are compressed, through the flow and the pressure of flow outlet modulating valve 7 control ejections.
Dynamic pressure signal when gathering the gas compressor operation by four high frequency sound dynamic pressure transducers 8,9,10,11, high frequency sound dynamic pressure transducer 8,9,10 is installed in casing place, movable vanes at different levels top, and sensor 11 is installed on the casing of stator blade trailing edge of afterbody; This signal is sent to a signal preamplifier 12 respectively then, and the Dynamic Signal of gathering is simulated amplification, and the maximum pressure value when Amplifier Gain is selected with gas compressor stable operation is the upper limit, and CLV ceiling limit value is chosen on 4.5 volts the magnitude; By low-pass filtering module 13,, obtain to gather signal medium and low frequency pulsation feature then with high-frequency signal, white noise signal and control circuit self oscillations signal cutout and isolation; Again through 16 analog-digital converters 14, analog-signal transitions is become numerical signal, import four numerical signal processor DSP15,16,17,18, this numerical signal processor can adopt the FFT Arithmetic Processing Chip, the variation characteristic of mobile unstability tendency signal one order harmonics of the different gas compressor operating conditionss of Synchronization Analysis, and finish the power spectrum of gathering signal and search for, if do not find to meet the requirement that preestablishes an order harmonic frequency amplitude, then do not send control signal, proceed the collection of the dynamic signal of gas compressor; After if the power spectrum search finishes, find to meet the requirement that preestablishes an order harmonic frequency amplitude, then according to predefined threshold values, send the control output signal; By digital to analog converter 19, the above-mentioned numerical control signal transition of sending is become simulation control output signal again; This signal is sent to four little discharge rate solenoid electric valves 2 (among the figure with a signal) respectively and a high frequency sound strength is carried control valve 4; Send high-pressure pulsating gas behind this high frequency sound strength conveying control valve acknowledge(ment) signal and flow to surge tank 3; This surge tank 3 is set the pressure stable value according to the requirement of operating conditions, and high pressure draught is transported to little discharge rate solenoid electric valve 2; At last by these four micro nozzles 1 of discharge rate solenoid electric valve control slightly, micro nozzle 1 is arranged in first order movable vane leading edge place, by control stream pressure and speed, make it to eject high pressure draught less than the micrometeor of the millesimal scope of gas compressor design discharge, thereby change the non-permanent feature of movable vane channel interior gas flow, realize the purpose in expanding multi-stage, axial flow compressor stable operation zone.
The present embodiment device comprises: four high frequency sound dynamic pressure transducers 8,9,10,11, sensor are differential pressure type, the high frequency sound pressure transducers of the XCS-190 series of U.S. KULITE Sensitive Object production, and the sensor Dynamic response is 150KHz.Sensor 8,9,10 is installed in casing place, movable vanes at different levels top, and axial position is at the leading edge place of movable vane.Sensor 11 is installed on the casing of stator blade trailing edge of afterbody.These high frequency sound dynamic pressure transducers are connected to a signal preamplifier 12 jointly; The other end of this signal preamplifier is connected to a low-pass filtering module 13; The other end of this low-pass filtering module is connected to 16 analog-digital converters 14; The other end of these 16 analog-digital converters is connected to four numerical signal processor DSP15,16,17,18 to four road parallel branchs are arranged, and this numerical signal processor is selected the FFT Arithmetic Processing Chip for use; The other end of these numerical signal processors is connected to a digital to analog converter 19 jointly; The other end of this digital to analog converter has five parallel branchs, and a branch is connected to the high frequency sound strength and carries control valve 4, and all the other four branches are connected to four little discharge rate solenoid electric valves 2; This high frequency sound strength carries control valve 4 to be installed on the tracheae 21, and material is a stainless steel; This tracheae 21 is communicated with multi stage axial flow compressor, and its ingress is positioned at the downstream of last row's stator blade of multi stage axial flow compressor, to avoid too high flow disturbance.Tracheae 21 outlet ports connect a surge tank 3; This surge tank is drawn four bronchuses 22, and bronchus 22 adopts stainless steel, and four micro nozzles 1 are installed in these four bronchus 22 outlet ports respectively, and micro nozzle 1 all is arranged in first order movable vane leading edge place, and axial position is before movable vane.Be separately installed with aforesaid little discharge rate solenoid electric valve 2 on these bronchuses 22.
It all is components and parts that extensively adopt in machinery and control field that above-mentioned involved micro nozzle 1, little discharge rate solenoid electric valve 2, high frequency response strength are carried control valve 4 and surge tank 3, and common engineers and technicians all can understand and mate.Wherein little discharge rate solenoid electric valve 2 is four solenoid electric valves, and its running principle is that the direct current square signal of accepting a 0-5 volt triggers solenoid valve work, makes it open little discharge rate solenoid electric valve by predefined aperture.The high frequency response strength carries control valve 4 running principles identical with it.
When axial flow compressor is other progression, increase or reduce the number of high frequency sound dynamic pressure transducer accordingly, the casing place of casing place, every grade of movable vane top and afterbody stator blade trailing edge installs one; Numerical signal processor DSP, little discharge rate solenoid electric valve 2, bronchus 22, micro nozzle 1 and electric connection circuit also increase or reduce number accordingly.
Claims (8)
1, the method for a kind of expanding multi-stage, axial flow gas compressor stable operation zone may further comprise the steps:
At first, dynamic pressure signal when the high frequency sound dynamic pressure transducer at the casing place by laying respectively at casing place, multi stage axial flow compressor movable vanes at different levels top and afterbody stator blade trailing edge is gathered the gas compressor operation, a high frequency sound dynamic pressure transducer is installed at each casing place;
Then above-mentioned signal is sent to a signal preamplifier respectively, simulates amplification, the maximum pressure value when Amplifier Gain is selected with gas compressor stable operation is the upper limit;
The signal of signal preamplifier output with high-frequency signal, white noise signal and control circuit self oscillations signal cutout and isolation, obtains to gather the low frequency pulsating feature in the signal by low-pass filtering module then;
The signal of low-pass filtering module output passes through analog-digital converter more then, and analog-signal transitions is become numerical signal;
The variation characteristic of the above-mentioned numerical signal input and mobile unstability tendency signal one order harmonics of numerical signal processor DSP Synchronization Analysis gas compressor operating conditions of high frequency sound dynamic pressure transducer equal number, and finish the power spectrum of gathering signal and search for, if do not find to meet the requirement that preestablishes an order harmonic frequency amplitude, then do not send control signal, proceed the collection of the dynamic signal of gas compressor; After if the power spectrum search finishes, find to meet the requirement that preestablishes an order harmonic frequency amplitude, then according to predefined threshold values, send the control output signal;
This control output signal becomes simulation control output signal again by digital to analog converter with the numerical control signal transition;
This simulation control output signal is sent to respectively with the same number of little discharge rate solenoid electric valve of high frequency sound dynamic pressure transducer and a high frequency sound strength and carries control valve; Send high-pressure pulsating gas behind this high frequency sound strength conveying control valve acknowledge(ment) signal and flow to surge tank; This surge tank is set the pressure stable value according to the requirement of operating conditions, and high pressure draught is transported to little discharge rate solenoid electric valve;
At last by this slightly the control of discharge rate solenoid electric valve be installed in the micro nozzle at first order movable vane leading edge place, by control stream pressure and speed, make it to eject the high pressure draught of micrometeor, thereby change the non-permanent feature of movable vane channel interior gas flow, realize the purpose in expanding multi-stage, axial flow compressor stable operation zone.
2, the method for expanding multi-stage according to claim 1, axial flow gas compressor stable operation zone is characterized in that: the CLV ceiling limit value of wherein said signal preamplifier gain is chosen on 4.5 volts the magnitude.
3, the method for expanding multi-stage according to claim 1, axial flow gas compressor stable operation zone is characterized in that: wherein said digital to analog converter is 16 figure place weighted-voltage D/A converters.
4, the method for expanding multi-stage according to claim 1, axial flow gas compressor stable operation zone is characterized in that: wherein said numerical signal processor DSP is the FFT Arithmetic Processing Chip.
5, the method for expanding multi-stage according to claim 1, axial flow gas compressor stable operation zone is characterized in that: the wherein said high pressure draught of micrometeor that ejects is less than the millesimal scope of gas compressor design discharge.
6, be used to realize the device of the method for the described expanding multi-stage of claim 1, axial flow gas compressor stable operation zone, it is characterized in that comprising:
A plurality of high frequency sound dynamic pressure transducers, a casing place that is positioned at multi stage axial flow compressor afterbody stator blade trailing edge, all the other install one at each casing place, movable vane top;
A signal preamplifier is connected with these high frequency sound dynamic pressure transducer output terminals;
A low-pass filtering module is connected with the output terminal of this signal preamplifier;
An analog-digital converter is connected with the output terminal of this low-pass filtering module;
A plurality of numerical signal processor DSP are connected with the output terminal of this analog-digital converter respectively in parallel, and the number of numerical signal processor is identical with high frequency sound dynamic pressure transducer number;
A digital to analog converter is connected jointly with the output terminal of above-mentioned these numerical signal processors;
A high frequency sound strength is carried control valve, electrically connects this digital to analog converter, in order to the flow of gas in the control tracheae;
One root timber matter is that stainless tracheae is communicated with multistage, axial flow compressor, this high frequency sound strength is installed carries control valve, and that the air pipe inlet place is positioned at is multistage, the downstream of last row's stator blade of axial flow compressor;
A surge tank links to each other with the outlet port of this tracheae, and drawing a plurality of materials is stainless bronchus, and the bronchus number is identical with high frequency sound dynamic pressure transducer number;
A plurality of little discharge rate solenoid electric valves electrically connect this digital to analog converter, are installed in respectively on these bronchuses, and each bronchus is installed one;
A plurality of micro nozzles are installed in these bronchial outlet ports respectively, are positioned at multi stage axial flow compressor first order movable vane leading edge place.
7, the device of expanding multi-stage according to claim 6, axial flow gas compressor stable operation zone is characterized in that: wherein said digital to analog converter is 16 figure place weighted-voltage D/A converters.
8, the device of expanding multi-stage according to claim 6, axial flow gas compressor stable operation zone is characterized in that: wherein said numerical signal processor DSP is the FFT Arithmetic Processing Chip.
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| CN 02123219 CN1291161C (en) | 2002-06-13 | 2002-06-13 | Process and apparatus for expanding multi-stage axial flow gas compressor stable operation zone |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100451900C (en) * | 2004-06-10 | 2009-01-14 | 上海施耐德日盛压缩机有限公司 | Intelligent control method for air compressor |
| CN102022351A (en) * | 2010-12-08 | 2011-04-20 | 北京航空航天大学 | Method for widening stable working range of high-load axial flow gas compressor |
| CN102536866A (en) * | 2010-12-01 | 2012-07-04 | 通用电气公司 | Surge precursor protection systems and methods |
| CN102900564A (en) * | 2011-07-25 | 2013-01-30 | 中国科学院工程热物理研究所 | Blade top air injection stability controller for axial flow compression system |
| CN106640722A (en) * | 2017-01-24 | 2017-05-10 | 中国科学院工程热物理研究所 | Gas compressor aerodynamic stability diagnosis and control device and method |
| CN108387378A (en) * | 2018-01-22 | 2018-08-10 | 西安航天动力试验技术研究所 | A kind of engine test Propellant Supply low frequency pulsating suppressing method and system |
| CN110608187A (en) * | 2019-10-30 | 2019-12-24 | 江西理工大学 | Axial flow compressor stall surge prediction device based on frequency characteristic change |
| CN116771709A (en) * | 2023-08-03 | 2023-09-19 | 哈尔滨工程大学 | Dynamic stall test system of five-stage axial flow compressor |
-
2002
- 2002-06-13 CN CN 02123219 patent/CN1291161C/en not_active Expired - Lifetime
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100451900C (en) * | 2004-06-10 | 2009-01-14 | 上海施耐德日盛压缩机有限公司 | Intelligent control method for air compressor |
| CN102536866B (en) * | 2010-12-01 | 2015-11-25 | 通用电气公司 | The method of compressor assembly and supervision compressor assembly |
| CN102536866A (en) * | 2010-12-01 | 2012-07-04 | 通用电气公司 | Surge precursor protection systems and methods |
| CN102022351B (en) * | 2010-12-08 | 2012-06-27 | 北京航空航天大学 | Method for widening stable working range of high-load axial flow gas compressor |
| CN102022351A (en) * | 2010-12-08 | 2011-04-20 | 北京航空航天大学 | Method for widening stable working range of high-load axial flow gas compressor |
| CN102900564A (en) * | 2011-07-25 | 2013-01-30 | 中国科学院工程热物理研究所 | Blade top air injection stability controller for axial flow compression system |
| CN102900564B (en) * | 2011-07-25 | 2015-01-07 | 中国科学院工程热物理研究所 | Blade top air injection stability controller for axial flow compression system |
| CN106640722A (en) * | 2017-01-24 | 2017-05-10 | 中国科学院工程热物理研究所 | Gas compressor aerodynamic stability diagnosis and control device and method |
| WO2018137394A1 (en) * | 2017-01-24 | 2018-08-02 | 中国科学院工程热物理研究所 | Apparatus and method for diagnosing and controlling aerodynamic stability of compressor |
| CN106640722B (en) * | 2017-01-24 | 2019-03-01 | 中国科学院工程热物理研究所 | A kind of device and method of pneumatic stability of gas compressor diagnosis and control |
| US11536285B2 (en) | 2017-01-24 | 2022-12-27 | Institute Of Engineering Thermophysics, Chinese Academy Of Sciences | Apparatus and method for diagnosing and controlling aerodynamic stability of compressor |
| CN108387378A (en) * | 2018-01-22 | 2018-08-10 | 西安航天动力试验技术研究所 | A kind of engine test Propellant Supply low frequency pulsating suppressing method and system |
| CN110608187A (en) * | 2019-10-30 | 2019-12-24 | 江西理工大学 | Axial flow compressor stall surge prediction device based on frequency characteristic change |
| CN116771709A (en) * | 2023-08-03 | 2023-09-19 | 哈尔滨工程大学 | Dynamic stall test system of five-stage axial flow compressor |
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| CN1291161C (en) | 2006-12-20 |
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Assignee: Yancon Cathay Coal Chemicals Co., Ltd. Assignor: Institute of Engineering Thermophysics, Chinese Academy of Sciences Contract fulfillment period: 2008.8.15 to 2013.8.14 Contract record no.: 2008370000068 Denomination of invention: Process and apparatus for expanding multi-stage axial flow gas compressor stable operation zone Granted publication date: 20061220 License type: Exclusive license Record date: 20081024 |
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Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.8.15 TO 2013.8.14; CHANGE OF CONTRACT Name of requester: YANKUANGGUOTAI CHEMICAL CO., LTD. Effective date: 20081024 |
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Effective date of registration: 20201204 Address after: No.56, Huanghai Avenue, Lianyungang Economic and Technological Development Zone, Lianyungang City, Jiangsu Province 222000 Patentee after: JIANGSU CHINESE ACADEMY OF SCIENCES ENERGY POWER RESEARCH CENTER Patentee after: Institute of Engineering Thermophysics, Chinese Academy of Sciences Address before: 100080 No. 12, Zhongguancun Road, Beijing, Haidian District Patentee before: Institute of Engineering Thermophysics, Chinese Academy of Sciences |
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Granted publication date: 20061220 |
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