CN115559853A - Method, system, medium and equipment for eliminating vortex-induced vibration of fan blade - Google Patents
Method, system, medium and equipment for eliminating vortex-induced vibration of fan blade Download PDFInfo
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- CN115559853A CN115559853A CN202211262912.7A CN202211262912A CN115559853A CN 115559853 A CN115559853 A CN 115559853A CN 202211262912 A CN202211262912 A CN 202211262912A CN 115559853 A CN115559853 A CN 115559853A
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000008030 elimination Effects 0.000 claims abstract description 51
- 238000003379 elimination reaction Methods 0.000 claims abstract description 51
- 238000013016 damping Methods 0.000 claims description 20
- 238000012544 monitoring process Methods 0.000 claims description 9
- 238000012423 maintenance Methods 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 claims 1
- 238000000926 separation method Methods 0.000 abstract description 4
- 230000005284 excitation Effects 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/0296—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor to prevent, counteract or reduce noise emissions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D17/00—Monitoring or testing of wind motors, e.g. diagnostics
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/0204—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor for orientation in relation to wind direction
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/022—Adjusting aerodynamic properties of the blades
- F03D7/0224—Adjusting blade pitch
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/04—Automatic control; Regulation
- F03D7/042—Automatic control; Regulation by means of an electrical or electronic controller
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
Abstract
The invention discloses a method, a system, a medium and equipment for eliminating vortex-induced vibration of a fan blade, wherein the method is characterized in that a vortex-induced vibration eliminating strategy is added in a main control program of a fan through a PLC (programmable logic controller), the vortex-induced vibration of the fan blade which is not powered off and is in a shutdown state can be eliminated, and if the main control program detects that the fan needs to execute the vortex-induced vibration eliminating strategy, a variable pitch system of the fan is controlled to execute a variable pitch vibration eliminating strategy in the vortex-induced vibration eliminating strategy; if the pitch control vibration elimination strategy fails to be executed, the main control program controls a yaw system of the fan to execute a yaw vibration elimination strategy in the vortex-induced vibration elimination strategy, finally, the wind speed and the vibration value of the fan meet preset conditions successfully, and vortex-induced vibration is eliminated to protect the safety of blades of the fan; the invention can control the fan to execute the pitch variation or yaw vibration elimination action under the non-outage shutdown state of the fan so as to destroy the periodicity of vortex-induced separation, inhibit vibration increase, fulfill the aim of eliminating vortex-induced vibration and protect the safety of fan blades.
Description
Technical Field
The invention relates to the technical field of fan vortex-induced vibration elimination, in particular to a method, a system, a medium and equipment for eliminating fan blade vortex-induced vibration.
Background
With the diameter of the impeller of the existing wind generating set increasing, the threat of vortex-induced vibration to the safety of the fan also increases. Most of the existing patents for restraining or eliminating the vortex-induced vibration of the fan aim at the vortex excitation of a tower barrel of the fan, and the patents aiming at the vortex excitation of the blade only adjust the state of the blade or add a turbulence device under the non-electrified state so as to achieve the purpose of reducing the vortex-induced vibration.
For example, in chinese patent No. CN112360684A, a method for suppressing vortex-induced vibration of a wind turbine blade is disclosed, the method comprising the step of adjusting a pitch angle of the blade with reference to a load range that the wind turbine can bear in a non-energized state of the wind turbine. The method can only play a role when the fan is in an idle state before power-on after hoisting is finished, and cannot achieve the purpose of inhibiting or eliminating vortex-induced vibration in a normal shutdown state after the hoisting and debugging of the fan are finished.
In the chinese invention patent CN114033634A, a device for suppressing the vortex-induced vibration of a fan is disclosed, which is characterized in that a plurality of groups of blade vortex-induced vibration suppression devices and tower drum vortex-induced vibration suppression devices are respectively installed on the front edge and the tail edge of a feathering blade and on both sides of a tower drum of the fan from the nearest region of the blade to the tower drum to the region where the chord length of the blade is close to the diameter of the tower drum, so as to balance the pressure of the windward side and the leeward side of the fan blade and the tower drum, destroy the smooth contour lines of the blade and the tower drum, destroy the consistency of the height of the edge of a large-size separation vortex, and disturb the frequency and the orderliness of the large-size separation vortex falling off behind the blade and the tower drum, thereby suppressing the vortex-induced resonance phenomenon of the large-size wind turbine blade and the tower drum.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a method for eliminating fan blade vortex-induced vibration.
The invention also provides a system for eliminating the vortex-induced vibration of the fan blade.
It is a third object of the invention to provide a non-transitory computer readable medium.
It is a fourth object of the invention to provide a computing device.
The first purpose of the invention is realized by the following technical scheme: a method for eliminating vortex-induced vibration of a fan blade is characterized in that a vortex-induced vibration eliminating strategy is added in a main control program of a fan through a PLC (programmable logic controller), the vortex-induced vibration of the fan blade can be eliminated when the fan is not powered off and is in a shutdown state, and if the main control program detects that the fan needs to execute the vortex-induced vibration eliminating strategy, a variable pitch system of the fan is controlled to execute the variable pitch vibration eliminating strategy in the vortex-induced vibration eliminating strategy; if the variable pitch vibration damping strategy fails to be executed, the main control program controls a yaw system of the fan to execute a yaw vibration damping strategy in the vortex-induced vibration damping strategy, finally, the wind speed and the vibration value of the fan meet preset conditions successfully, and vortex-induced vibration is eliminated so as to protect the safety of blades of the fan.
Further, the main control program detects that the fan needs to execute a vortex-induced vibration elimination strategy, and then controls a pitch system of the fan to execute a pitch vibration elimination strategy in the vortex-induced vibration elimination strategy, and specifically executes the following operations:
when the fan is in a shutdown state and under the conditions of non-outage maintenance and non-protection, the main control program needs to detect whether the conditions of variable-pitch vibration-damping starting, current wind speed within a set wind speed range and effective value of fan vibration are greater than a set threshold value, if the conditions are all met, whether a safety chain of the current fan is disconnected is judged, and if the safety chain is not disconnected, the main control program controls the fan to start to execute the action of a variable-pitch vibration-damping strategy, namely, firstly, v is used 1 At a speed of opening the paddle a 1 Waiting for time t after the completion of the paddle opening 1 Then, again with v 2 Is rotated to the original shutdown angle(ii) a If the safety chain is disconnected, the fan is subjected to primary reset bypass, and after the fan is recovered to a shutdown state, the action of a variable-pitch vibration-damping strategy is executed; and if the main control program still detects that the fan needs to change the pitch and damp after the actions of the pitch and damp strategy are finished, repeating the actions.
Further, the pitch control vibration elimination strategy fails to be executed, and the main control program controls a yaw system of the fan to execute a yaw vibration elimination strategy in the vortex-induced vibration elimination strategy, and specifically executes the following operations:
when the master control program detects that the pitch variation vibration elimination cannot work normally, namely the action execution of the pitch variation vibration elimination strategy fails, or the yaw vibration elimination is started manually, the switch for pitch variation vibration elimination is automatically closed, the master control program is converted into the action for executing the yaw vibration elimination strategy, the master control program needs to detect whether the current wind speed is within a set wind speed range or not and whether the effective value of the fan vibration is larger than a set threshold value or not, if the conditions are met, the yaw direction is judged according to the current torsion cable angle of the fan, and the yaw b is firstly carried out in one direction 1 Degree, waiting time t after completion of yaw 2 Judging whether the vibration value of the fan is smaller than a set threshold value or not, if so, quitting the yaw vibration elimination action, otherwise, yawing 2 x b towards the other direction 1 Degree; and if the main control program still detects that the fan needs to perform yaw vibration elimination after the yaw vibration elimination action is finished, repeating the action.
The second purpose of the invention is realized by the following technical scheme: a system for eliminating fan blade vortex-induced vibration, comprising:
the PLC main controller module is used for importing a strategy for eliminating vortex-induced vibration;
the variable pitch module is used for controlling the variable pitch action of the fan;
the variable pitch vibration elimination module is used for eliminating vortex-induced vibration of the fan blade by controlling the variable pitch module;
the yaw driving module is used for controlling the yaw action of the fan;
the yaw vibration elimination module is used for eliminating the vortex-induced vibration of the fan blades by controlling the yaw driving module;
the vibration sensor module is used for monitoring the vibration value of the fan;
the wind speed and direction monitoring module is used for monitoring the real-time wind speed of the fan;
and the yaw position encoder module is used for controlling the yaw direction of the fan.
The third purpose of the invention is realized by the following technical scheme: a non-transitory computer readable medium having stored thereon instructions which, when executed by a processor, perform the steps of the method of eliminating fan blade vortex induced vibrations according to the above.
The fourth purpose of the invention is realized by the following technical scheme: a computing device comprises a processor and a memory for storing a program executable by the processor, wherein the processor executes the program stored in the memory to realize the method for eliminating the vortex-induced vibration of the fan blade.
Compared with the prior art, the invention has the following advantages and beneficial effects:
after the fan is debugged and put into use, a strategy for eliminating vortex-induced vibration is added in a main control program of the fan, and based on a variable pitch system and a yaw system of the fan, required related signals exist in the fan, and additional hardware is not required to be added; meanwhile, when the risk of vortex-induced vibration is detected in the non-outage shutdown state of the fan, the fan is controlled to execute pitch variation or yaw vibration elimination action so as to destroy the periodicity of original vortex-induced separation, so that the increase of vibration is inhibited, the aim of eliminating the vortex-induced vibration is fulfilled, and the safety of the fan blade is protected.
Drawings
FIG. 1 is a flow chart of a pitch damping strategy.
FIG. 2 is a flow chart of a yaw oscillation damping strategy.
Detailed Description
The present invention will be further described with reference to the following specific examples.
Example 1
Referring to fig. 1 to 2, in the method for eliminating vortex-induced vibration of a fan blade provided in this embodiment, a vortex-induced vibration eliminating strategy is added to a main control program of a fan through a PLC main controller, so that the vortex-induced vibration of the fan blade can be eliminated when the fan is not powered off and is in a shutdown state, and if the main control program detects that the fan needs to execute the vortex-induced vibration eliminating strategy, a pitch system of the fan is controlled to execute a pitch vibration eliminating strategy in the vortex-induced vibration eliminating strategy; if the variable pitch vibration elimination strategy fails to be executed, the main control program controls a yaw system of the fan to execute a yaw vibration elimination strategy in a vortex-induced vibration elimination strategy, finally, the wind speed and the vibration value of the fan successfully meet preset conditions, vortex-induced vibration is eliminated so as to protect the safety of blades of the fan, and the following operations are specifically executed:
when the fan is in a shutdown state and under the conditions of non-power-off maintenance and non-protection, the main control program needs to detect whether the variable-pitch vibration-damping starting is met, the current wind speed is in a set wind speed range and the effective value of the fan vibration is larger than a set threshold value, if all the conditions are met, the main control program judges whether the current fan safety chain is disconnected, and if the safety chain is not disconnected, the main control program controls the fan to start to execute the action of a variable-pitch vibration-damping strategy, namely, firstly, the action is carried out by v 1 At a speed of opening the paddle a 1 Waiting for time t after the completion of the paddle opening 1 Then, again with v 2 The paddle is retracted to the original shutdown angle; if the safety chain is disconnected, the fan is subjected to primary reset bypass, and after the fan is recovered to a shutdown state, the action of a variable-pitch vibration-damping strategy is executed; if the master control program still detects that the fan needs to change the pitch and damp after the action of the pitch and damp strategy is finished, repeating the action; wherein v is 1 And v 2 Speed v not exceeding the normal variation of the fan 1 And v 2 In the range of 0 to 4 degrees per second, waiting time t 1 In the range of 30 seconds to 2 minutes, the opening angle a 1 The requirement of enabling the fan impeller to rotate in strong wind after the paddle is opened is met, but the rotating speed cannot be too high, so that a during testing 1 Between 1 and 10 degrees;
when the master control program detects that the pitch variation vibration elimination cannot work normally, namely the action execution of the pitch variation vibration elimination strategy fails or the yaw vibration elimination strategy is started manually, the switch for the pitch variation vibration elimination is automatically closed, the master control program is converted into the action for executing the yaw vibration elimination strategy, and the master control program needs to execute the yaw vibration elimination strategyIf the conditions are met, judging the yaw direction according to the cable twisting angle of the current fan, and firstly yawing in one direction b 1 Degree, waiting time t after completion of yaw 2 Judging whether the vibration value of the fan is smaller than a set threshold value or not, if so, quitting the yaw vibration elimination action, otherwise, yawing 2 x b towards the other direction 1 Degree; if the main control program still detects that the fan needs to carry out yaw vibration elimination after the yaw vibration elimination action is finished, repeating the action; wherein, the yaw angle b 1 In the range of 10 to 30 degrees, the waiting time t after the first yaw 2 Ranging between 30 seconds to 2 minutes.
Example 2
The embodiment discloses eliminate fan blade vortex induced vibration system includes:
the PLC main controller module is used for importing a strategy for eliminating vortex-induced vibration;
the variable pitch module is used for controlling the variable pitch action of the fan;
the variable pitch vibration elimination module is used for eliminating vortex-induced vibration of the fan blade by controlling the variable pitch module;
the yaw driving module is used for controlling the yaw action of the fan;
the yaw vibration elimination module is used for eliminating the fan blade vortex-induced vibration by controlling the yaw driving module;
the vibration sensor module is used for monitoring the vibration value of the fan;
the wind speed and direction monitoring module is used for monitoring the real-time wind speed of the fan;
and the yaw position encoder module is used for controlling the yaw direction of the fan.
Example 3
The present embodiment discloses a non-transitory computer readable medium storing instructions which, when executed by a processor, perform the steps of the method of eliminating fan blade vortex induced vibrations according to embodiment 1.
The non-transitory computer readable medium in this embodiment may be a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a Random Access Memory (RAM), a usb disk, a removable hard disk, or other media.
Example 4
The embodiment discloses a computing device, which comprises a processor and a memory, wherein the memory is used for storing a program executable by the processor, and when the processor executes the program stored by the memory, the method for eliminating the fan blade vortex-induced vibration, which is described in the embodiment 1, is realized.
The computing device in this embodiment may be a desktop computer, a notebook computer, a smart phone, a PDA handheld terminal, a tablet computer, a Programmable Logic Controller (PLC), or other terminal devices with a processor function.
The above-mentioned embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereby, and all changes made in the shape and principle of the present invention should be covered within the scope of the present invention.
Claims (6)
1. A method for eliminating vortex-induced vibration of a fan blade is characterized by comprising the following steps: the method is characterized in that a vortex-induced vibration elimination strategy is added in a main control program of the fan through a PLC main controller, blade vortex-induced vibration elimination can be carried out on the fan which is not powered off and is in a shutdown state, and if the main control program detects that the fan needs to execute the vortex-induced vibration elimination strategy, a variable pitch system of the fan is controlled to execute the variable pitch vibration elimination strategy in the vortex-induced vibration elimination strategy; if the variable pitch vibration damping strategy fails to be executed, the main control program controls a yaw system of the fan to execute a yaw vibration damping strategy in the vortex-induced vibration damping strategy, finally, the wind speed and the vibration value of the fan meet preset conditions successfully, and vortex-induced vibration is eliminated so as to protect the safety of blades of the fan.
2. The method for eliminating the vortex-induced vibration of the fan blade according to claim 1, wherein when the main control program detects that the fan needs to execute a strategy for eliminating the vortex-induced vibration, the main control program controls a pitch system of the fan to execute a pitch-controlled vibration elimination strategy in the strategy for eliminating the vortex-induced vibration, and specifically executes the following operations:
when the fan is in a shutdown state and under the conditions of non-outage maintenance and non-protection, the main control program needs to detect whether the conditions of variable-pitch vibration-damping starting, current wind speed within a set wind speed range and effective value of fan vibration are greater than a set threshold value, if the conditions are all met, whether a safety chain of the current fan is disconnected is judged, and if the safety chain is not disconnected, the main control program controls the fan to start to execute the action of a variable-pitch vibration-damping strategy, namely, firstly, v is used 1 At a speed of opening the paddle a 1 Waiting for time t after the completion of the paddle opening 1 Then, v again 2 The paddle is retracted to the original shutdown angle; if the safety chain is disconnected, the fan is subjected to primary reset bypass, and after the fan is recovered to a shutdown state, the action of a variable-pitch vibration-damping strategy is executed; and if the main control program still detects that the fan needs to change the pitch and damp after the actions of the pitch and damp strategy are finished, repeating the actions.
3. The method for eliminating the vortex-induced vibration of the fan blade according to claim 1, wherein the pitch-controlled vibration-damping strategy fails to be executed, and the main control program controls a yaw system of the fan to execute a yaw vibration-damping strategy in the vortex-induced vibration-damping strategy, and specifically executes the following operations:
when the master control program detects that the pitch variation vibration elimination cannot work normally, namely the action execution of the pitch variation vibration elimination strategy fails, or the yaw vibration elimination is started manually, the switch for pitch variation vibration elimination is automatically closed, the master control program is converted into the action for executing the yaw vibration elimination strategy, the master control program needs to detect whether the current wind speed is within a set wind speed range or not and whether the effective value of the fan vibration is larger than a set threshold value or not, if the conditions are met, the yaw direction is judged according to the current torsion cable angle of the fan, and the yaw b is firstly carried out in one direction 1 Degree, waiting time t after completion of yaw 2 Judging whether the vibration value of the fan is smaller than a set threshold value or not, if so, quitting the yaw vibration elimination action, otherwise, yawing 2 x b towards the other direction 1 Degree; if the yaw vibration elimination action is finished, the main control program stillAnd if the fan is detected to need yaw vibration absorption, repeating the actions.
4. A system for eliminating vortex-induced vibration of fan blades, comprising:
the PLC main controller module is used for importing a strategy for eliminating vortex-induced vibration;
the variable pitch module is used for controlling the variable pitch action of the fan;
the variable pitch vibration elimination module is used for eliminating vortex-induced vibration of the fan blade by controlling the variable pitch module;
the yaw driving module is used for controlling the yaw action of the fan;
the yaw vibration elimination module is used for eliminating the vortex-induced vibration of the fan blades by controlling the yaw driving module;
the vibration sensor module is used for monitoring the vibration value of the fan;
the wind speed and direction monitoring module is used for monitoring the real-time wind speed of the fan;
and the yaw position encoder module is used for controlling the yaw direction of the fan.
5. A non-transitory computer readable medium storing instructions, wherein the instructions, when executed by a processor, perform the steps of the method of eliminating wind turbine blade vortex induced vibrations according to any one of claims 1 to 3.
6. A computing device comprising a processor and a memory for storing a program executable by the processor, wherein the processor, when executing the program stored in the memory, implements the method for eliminating fan blade vortex induced vibrations according to any one of claims 1 to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211262912.7A CN115559853A (en) | 2022-10-14 | 2022-10-14 | Method, system, medium and equipment for eliminating vortex-induced vibration of fan blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211262912.7A CN115559853A (en) | 2022-10-14 | 2022-10-14 | Method, system, medium and equipment for eliminating vortex-induced vibration of fan blade |
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| Publication Number | Publication Date |
|---|---|
| CN115559853A true CN115559853A (en) | 2023-01-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211262912.7A Pending CN115559853A (en) | 2022-10-14 | 2022-10-14 | Method, system, medium and equipment for eliminating vortex-induced vibration of fan blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115559853A (en) |
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2022
- 2022-10-14 CN CN202211262912.7A patent/CN115559853A/en active Pending
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