CN210889217U - Wind tunnel test wind turbine blade pressure measuring device and model pipe length correcting device - Google Patents
Wind tunnel test wind turbine blade pressure measuring device and model pipe length correcting device Download PDFInfo
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- CN210889217U CN210889217U CN201921931884.7U CN201921931884U CN210889217U CN 210889217 U CN210889217 U CN 210889217U CN 201921931884 U CN201921931884 U CN 201921931884U CN 210889217 U CN210889217 U CN 210889217U
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- 238000012360 testing method Methods 0.000 title claims abstract description 58
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- 229910052802 copper Inorganic materials 0.000 claims description 15
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- 230000000694 effects Effects 0.000 abstract description 6
- 238000009530 blood pressure measurement Methods 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 7
- 239000011295 pitch Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000012937 correction Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000005316 response function Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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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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Abstract
The utility model discloses a wind tunnel test wind turbine blade pressure measuring device and a model pipe length correcting device, which relate to the technical field of wind tunnel tests, wherein the wind tunnel test wind turbine blade pressure measuring device comprises a rotating disc, a wind turbine blade and a pressure measuring system; the wind turbine blade sequentially comprises a root part, a middle part and a tip part from bottom to top; the root, the middle and the tip are all different wing profiles; the wind turbine blade is provided with a plurality of typical sections, and each typical section is provided with a pressure measuring hole; wherein the number of typical sections of the tip portion is greater than the number of typical sections of the root portion and the middle portion, and the number of typical sections of the root portion is the same as the number of typical sections of the middle portion; the wind turbine blades are arranged on the rotating disk and rotate along with the rotation of the rotating disk; and a pipeline of the pressure measuring system is connected with the pressure measuring hole. The wind tunnel test wind turbine blade pressure measuring device can perform a wind tunnel pressure measuring test on the whole wind turbine blade so as to better simulate the wind load effect of an actual wind turbine.
Description
Technical Field
The utility model relates to a wind tunnel test technical field especially relates to a wind tunnel test wind energy conversion system blade pressure measurement device and model pipe length correcting unit.
Background
The wind energy is taken as a renewable and pollution-free green energy source, and the application prospect of the wind energy is accepted by countries all over the world. In wind tunnel test, the test of wing profile is mostly carried out, and the whole wind turbine blade is researched through the wind tunnel test.
Therefore, it is urgently needed to design a wind turbine blade pressure measuring device suitable for a wind tunnel test, so that the pressure measuring test of a wind turbine blade model can be favorably carried out under different test working conditions, and the change of the wind load of the wind turbine blade under different pitch angles (the change rule of the wind load characteristic of the blade along with the turbulence intensity and the pitch angle and the wind-induced response of the blade under the condition of counter-feathering are analyzed).
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a wind tunnel test wind energy conversion system blade pressure measurement device and model pipe length correcting unit can carry out wind tunnel pressure measurement test to whole wind energy conversion system blade to the better actual wind energy conversion system that simulates out receives the wind load effect.
In order to achieve the above object, the utility model provides a following scheme:
a wind tunnel test wind turbine blade pressure measuring device comprises a rotating disc, a wind turbine blade and a pressure measuring system;
the wind turbine blade sequentially comprises a root part, a middle part and a tip part from bottom to top; the root, the middle and the tip are all different wing profiles;
the wind turbine blade is provided with a plurality of typical sections, and each typical section is provided with a pressure measuring hole; wherein the tip portion has a typical number of sections greater than the root portion and the middle portion, and the root portion has the same typical number of sections as the middle portion;
the wind turbine blades are arranged on the rotating disk and rotate along with the rotation of the rotating disk;
and a pipeline of the pressure measuring system is connected with the pressure measuring hole.
Optionally, each typical section of the root of the wind turbine blade is provided with the same number of pressure measuring holes; each typical section in the middle of the wind turbine blade is provided with the same number of pressure measuring holes; and each typical section of the tip part of the wind turbine blade is provided with the same number of pressure measuring holes.
Optionally, 21 pressure measuring holes are arranged on each typical section of the root of the wind turbine blade; each section in the middle of the wind turbine blade is provided with 17 pressure measuring holes; and each section of the tip part of the wind turbine blade is provided with 15 pressure measuring holes.
Optionally, the device also comprises a circular base with a cavity structure; the circular base is arranged at the bottom of the wind turbine blade and is fixed on the rotating disc through the circular disc, so that the wind turbine blade rotates along with the rotation of the rotating disc.
Optionally, the pipeline of the pressure measuring system extends into the wind turbine blade through the circular base, so that the pipeline of the pressure measuring system is connected with the pressure measuring hole.
Optionally, the number of typical cross sections of the tip portion is 5, the number of typical cross sections of the root portion is 3, and the number of typical cross sections of the middle portion is 3.
Optionally, the airfoil profile of the root of the wind turbine blade is an S818 airfoil profile; the airfoil profile in the middle of the wind turbine blade is an S825 airfoil profile; the airfoil shape of the tip of the wind turbine blade is an S826 airfoil shape.
Optionally, the pipeline of the pressure measuring system is a single-section pipeline.
In order to achieve the above object, the present invention further provides the following scheme:
a wind tunnel test model pipe length correcting device comprises a wind tunnel test wind turbine blade pressure measuring device, a bottom plate, a signal generator, a power amplifier, a scanning valve and a loudspeaker;
the power amplifier is electrically connected with the signal generator, the loudspeaker is electrically connected with the power amplifier, and the loudspeaker is fixedly arranged on the bottom plate; the bottom plate is provided with a pressure measuring point; the pressure measuring point is connected with the scanning valve through first copper pipes with different lengths; and the other end of the scanning valve is connected with a pressure measuring system of the wind tunnel test wind turbine blade pressure measuring device through a second copper pipe.
According to the utility model provides a concrete embodiment, the utility model discloses a following technological effect:
the utility model provides a wind tunnel test wind turbine blade pressure measuring device and a model pipe length correcting device, wherein the wind turbine blade can fully consider the strength requirement and the pneumatic performance of the structure by setting different wing profiles; more typical sections and pressure measuring holes are arranged at the tip of the wind turbine blade, so that the wind load effect of an actual wind turbine can be better simulated.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
FIG. 1 is a schematic view of a wind turbine blade pressure measuring device according to an embodiment of the present invention;
FIG. 2 is a profile view of a wind turbine blade according to an embodiment of the present invention;
FIG. 3 is an overall view of a wind turbine blade according to an embodiment of the present invention 1;
FIG. 4 is a general view of a wind turbine blade according to an embodiment of the present invention, shown in FIG. 2;
FIG. 5 is a top view of an embodiment of a wind turbine blade;
fig. 6 is a schematic view of a ring base according to an embodiment of the present invention;
fig. 7 is a front view of a ring base according to an embodiment of the present invention;
fig. 8 is a left side view of the ring base according to the embodiment of the present invention;
fig. 9 is a top view of a ring base according to an embodiment of the present invention;
FIG. 10 is an elevation view showing the arrangement of the measuring points of the wind turbine blade according to the embodiment of the present invention;
FIG. 11 is a view showing the arrangement of the measuring points on the model layer of the wind turbine blade according to the embodiment of the present invention; FIG. 11(a) is a schematic elevation view; FIG. 11(b) is an upper airfoil plot; FIG. 11(c) is a lower airfoil plot; FIG. 11(d) is a layout diagram of tip test point layers; FIG. 11(e) is a view showing arrangement of middle test point layers; FIG. 11(f) is a view showing the arrangement of the root measurement point layers;
fig. 12 is the embodiment of the utility model provides a wind tunnel test model pipe length correcting unit sketch.
Description of the symbols
1-tip of wind turbine blade; 2-the middle part of the wind turbine blade; 3-root of wind turbine blade; 4-a circular base; 5-a first ring base; 6-second ring base.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model aims at providing a wind tunnel test wind energy conversion system blade pressure measurement device and model pipe length correcting unit can carry out wind tunnel pressure measurement test to whole wind energy conversion system blade to the better actual wind energy conversion system that simulates out receives the wind load effect.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
Example 1
As shown in fig. 1 to 9, the wind tunnel test wind turbine blade pressure measuring device provided by this embodiment includes a rotating disc, a wind turbine blade, and a pressure measuring system.
The wind turbine blade sequentially comprises a root part 3, a middle part 2 and a tip part 1 from bottom to top; the root 3, the mid-section 2 and the tip 1 are all different airfoils, as shown in fig. 1.
The wind turbine blade is provided with a plurality of typical sections, and each typical section is provided with a pressure measuring hole; wherein the number of typical sections of the tip portion 1 is greater than those of the root portion 3 and the middle portion 2, and the number of typical sections of the root portion 3 is the same as that of the middle portion 2.
The wind turbine blades are arranged on the rotating disk and rotate along with the rotation of the rotating disk.
And a pipeline of the pressure measuring system is connected with the pressure measuring hole.
Preferably, each typical section of the root 3 of the wind turbine blade is provided with the same number of pressure measuring holes; each typical section of the middle part 2 of the wind turbine blade is provided with the same number of pressure measuring holes; the tip 1 of the wind turbine blade is provided with the same number of pressure measuring holes on each typical section.
Preferably, 21 pressure measuring holes are arranged on each typical section of the root 3 of the wind turbine blade; each section of the middle part 2 of the wind turbine blade is provided with 17 pressure measuring holes; each section of the tip part 1 of the wind turbine blade is provided with 15 pressure measuring holes.
Preferably, the wind tunnel test wind turbine blade pressure measuring device provided by the embodiment further comprises a circular base 4 with a cavity structure; the circular base 4 is arranged at the bottom of the wind turbine blade and is fixed on the rotating disc through the circular disc, so that the wind turbine blade rotates along with the rotation of the rotating disc.
The pipeline of the pressure measuring system extends into the blade of the wind turbine through the circular base 4, so that the pipeline of the pressure measuring system is connected with the pressure measuring hole.
Preferably, the number of typical sections of the tip portion 1 is 5, the number of typical sections of the root portion 3 is 3, and the number of typical sections of the middle portion 2 is 3.
Preferably, the airfoil shape of the root 3 of the wind turbine blade is an S818 airfoil shape; the airfoil profile of the middle part 2 of the wind turbine blade is an S825 airfoil profile; the airfoil shape of the tip 1 of the wind turbine blade is an S826 airfoil shape.
Preferably, the pressure measuring system is a single-section pipeline.
Example 2
As shown in fig. 12, the wind tunnel test model tube length correction device provided in this embodiment includes the wind tunnel test wind turbine blade pressure measurement device described in embodiment 1, a base plate, a signal generator, a power amplifier, a scan valve, and a speaker.
The power amplifier is electrically connected with the signal generator, the loudspeaker is electrically connected with the power amplifier, and the loudspeaker is fixedly arranged on the bottom plate; a pressure measuring point is arranged on the bottom plate; the pressure measuring point is connected with one end of the scanning valve through first copper pipes with different lengths; the other end of the scanning valve is connected with a pressure measuring system of a wind tunnel test wind turbine blade pressure measuring device through a second copper pipe.
Example 3
As shown in fig. 1 to 11, the wind tunnel test wind turbine blade pressure measuring device provided by this embodiment includes a rotating disc, a wind turbine blade, and a pressure measuring system.
The wind turbine blade is made of PVC material, and the airfoil profile of the wind turbine blade is NREL-S series. The wind turbine blade sequentially comprises a root part 3, a middle part 2 and a tip part 1 from bottom to top; the root 3, the middle part 2 and the tip 1 are all different wing profiles; the airfoil profile of the root 3 of the wind turbine blade is an S818 airfoil profile; the airfoil profile of the middle part 2 of the wind turbine blade is an S825 airfoil profile; the airfoil shape of the tip 1 of the wind turbine blade is an S826 airfoil shape.
As shown in FIG. 10, the wind turbine blade has a complex shape structure, and the chord lengths and twist angles of different blades are different along the spanwise direction. The wind turbine blade is provided with 11 typical sections, the arrangement positions of the typical sections are determined according to the length percentage of the wind turbine blade, and the typical sections are arranged at 10%, 25%, 35%, 45%, 55%, 65%, 75%, 85%, 90%, 95% and 99% of the length of the wind turbine blade from bottom to top. The length of the wind turbine blade in the embodiment is 2m, so that a total of 11 typical cross sections are arranged at 200mm, 500mm, 700mm, 900mm, 1100mm, 1300mm, 1500mm, 1700mm, 1800mm, 1900mm and 1980mm of the length of the wind turbine blade from bottom to top. Wherein, the number of the typical sections of the tip part 1 is 5, the number of the typical sections of the root part 3 is 3, and the number of the typical sections of the middle part 2 is 3. Each typical section is provided with a pressure tap. Each typical section of the root 3 of the wind turbine blade is provided with 21 pressure measuring holes; each section of the middle part 2 of the wind turbine blade is provided with 17 pressure measuring holes; each section of the tip part 1 of the wind turbine blade is provided with 15 pressure measuring holes. 189 pressure measuring holes are arranged on the whole wind turbine blade.
The wind turbine blade further comprises a circular base 4 with a cavity structure, the circular base 4 is arranged at the bottom of the wind turbine blade, and the circular base 4 is fixed on the rotating disc through a circular disc, so that the wind turbine blade rotates along with the rotation of the rotating disc. The circular discs comprise a first circular base 5, a second circular base 6 and a wooden circular disc. Wherein, the diameter of the first circular ring base 5 is 8.6 cm. The diameter of the second circular base 6 is 18.8cm and the diameter of the wooden disc is 50.5 cm. A first circular ring base 5 is connected below the circular base 4 to increase the contact area so as to facilitate the erection of the wind turbine blade. The second circular ring base 6 is fixed below the first circular ring base 5. The wooden disc is fixed below the second circular base 6 in a bolt and nut mode, specifically, 4 holes are drilled in the fixing position of the wooden disc, and then the wooden disc and the second circular base 6 are fixed through bolt and nut connection. The wooden disc is fixed on a rotating disc in a wind tunnel test, the middle part 2 of the wooden disc is a hollow through hole, and a space is reserved for connecting a pressure measuring pipeline with a scanning valve in a pressure measuring system.
And a pipeline of the pressure measuring system is connected with the pressure measuring hole. A pipeline of the pressure measuring system sequentially passes through the circular base 4, the first circular base 5, the second circular base 6 and the wooden disc to extend into the wind turbine blade, so that the pipeline of the pressure measuring system is connected with the pressure measuring hole. Wherein, the pipeline of the pressure measuring system is a single-section pipeline.
In order to better simulate the wind load effect of an actual wind turbine and accurately analyze the change condition of the wind load of different blade pitches of the wind turbine blades based on wind fields with different turbulence intensities, the embodiment also provides a wind tunnel test model pipe length correcting device.
The wind tunnel test model pipe length correcting device comprises a wind tunnel test wind turbine blade pressure measuring device, a bottom plate, a signal generator, a power amplifier, a scanning valve and a loudspeaker.
The power amplifier is electrically connected with the signal generator, the loudspeaker is electrically connected with the power amplifier, and the loudspeaker is fixedly arranged on the bottom plate; the bottom plate is provided with 10 pressure measuring points; the pressure measuring point is connected with one end of the scanning valve through 10 first copper pipes with different lengths; wherein, the scanning valve is an electronic scanning valve. The pressure measuring point is also connected with a pressure sensor. The other end of the scanning valve is connected with a pressure measuring system of a wind tunnel test wind turbine blade pressure measuring device through a second copper pipe. Specifically, the other end of the scanning valve is connected with a scanning valve in a pressure measuring system of a wind turbine blade pressure measuring device in the wind tunnel test through a second copper pipe. The lengths of the 10 first copper pipes are 900mm, 1100mm, 1300mm, 1500mm, 1700mm, 1900mm, 2000mm, 2100mm and 2200mm respectively, the length of the second copper pipe is very short, and the bottom plate is a thicker PVC plate.
Because the length of the wind turbine blade exceeds 1.4m, the attenuation and distortion of the signal need to be considered, and therefore the correction of the pressure measurement signal is needed. The working principle of the wind tunnel test model pipe length correcting device is as follows: the signal generated by the signal generator passes through the power amplifier and then drives the loudspeaker to generate pressure waves, a thicker PVC plate is arranged opposite to the loudspeaker, 10 pressure measuring points are arranged at the center of the thicker PVC plate, and 10 first copper pipes with different lengths and a short second copper pipe are respectively connected to the electronic scanning valve to obtain a pressure time interval. The frequency response function of each copper pipe is measured by performing a measurement test on the frequency response functions of the copper pipes with different lengths, so that the pipe length of the wind tunnel test model is corrected.
Experiments verify that the wind tunnel test wind turbine blade pressure measuring device with the assembled parts and the rotating disc in the wind tunnel fixedly connected can meet the requirement of researching the wind load characteristics of the wind turbine blade under the test working condition under different pitch angles by rotating the rotating disc under the action of wind load.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The principle and the implementation of the present invention are explained herein by using specific examples, and the above description of the embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (9)
1. A wind tunnel test wind turbine blade pressure measuring device is characterized in that the wind tunnel test wind turbine blade pressure measuring device comprises a rotating disc, a wind turbine blade and a pressure measuring system;
the wind turbine blade sequentially comprises a root part, a middle part and a tip part from bottom to top; the root, the middle and the tip are all different wing profiles;
the wind turbine blade is provided with a plurality of typical sections, and each typical section is provided with a pressure measuring hole; wherein the tip portion has a typical number of sections greater than the root portion and the middle portion, and the root portion has the same typical number of sections as the middle portion;
the wind turbine blades are arranged on the rotating disk and rotate along with the rotation of the rotating disk;
and a pipeline of the pressure measuring system is connected with the pressure measuring hole.
2. The wind tunnel test wind turbine blade pressure measuring device according to claim 1, wherein each typical section of the root of the wind turbine blade is provided with the same number of pressure measuring holes; each typical section in the middle of the wind turbine blade is provided with the same number of pressure measuring holes; and each typical section of the tip part of the wind turbine blade is provided with the same number of pressure measuring holes.
3. The wind tunnel test wind turbine blade pressure measuring device according to claim 1, wherein 21 pressure measuring holes are formed in each typical section of the root of the wind turbine blade; each section in the middle of the wind turbine blade is provided with 17 pressure measuring holes; and each section of the tip part of the wind turbine blade is provided with 15 pressure measuring holes.
4. The wind tunnel test wind turbine blade pressure measuring device according to claim 1, further comprising a circular base having a cavity structure; the circular base is arranged at the bottom of the wind turbine blade and is fixed on the rotating disc through the circular disc, so that the wind turbine blade rotates along with the rotation of the rotating disc.
5. The wind tunnel test wind turbine blade pressure measuring device according to claim 4, wherein a pipeline of the pressure measuring system extends into the interior of the wind turbine blade through the circular base, so that the pipeline of the pressure measuring system is connected with the pressure measuring hole.
6. The wind tunnel test wind turbine blade pressure measuring device according to claim 1, wherein the number of the typical sections of the tip portion is 5, the number of the typical sections of the root portion is 3, and the number of the typical sections of the middle portion is 3.
7. The wind tunnel test wind turbine blade pressure measuring device according to claim 1, wherein the airfoil profile at the root of the wind turbine blade is an S818 airfoil profile; the airfoil profile in the middle of the wind turbine blade is an S825 airfoil profile; the airfoil shape of the tip of the wind turbine blade is an S826 airfoil shape.
8. The wind tunnel test wind turbine blade pressure measuring device according to claim 1, wherein the pipeline of the pressure measuring system is a single-section pipeline.
9. A wind tunnel test model pipe length correcting device is characterized by comprising a wind tunnel test wind turbine blade pressure measuring device, a bottom plate, a signal generator, a power amplifier, a scanning valve and a loudspeaker, wherein the wind tunnel test model pipe length correcting device comprises the wind tunnel test wind turbine blade pressure measuring device, the bottom plate, the signal generator, the power amplifier, the scanning valve and the loudspeaker;
the power amplifier is electrically connected with the signal generator, the loudspeaker is electrically connected with the power amplifier, and the loudspeaker is fixedly arranged on the bottom plate; the bottom plate is provided with a pressure measuring point; the pressure measuring point is connected with one end of the scanning valve through first copper pipes with different lengths; and the other end of the scanning valve is connected with a pressure measuring system of the wind tunnel test wind turbine blade pressure measuring device through a second copper pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921931884.7U CN210889217U (en) | 2019-11-11 | 2019-11-11 | Wind tunnel test wind turbine blade pressure measuring device and model pipe length correcting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921931884.7U CN210889217U (en) | 2019-11-11 | 2019-11-11 | Wind tunnel test wind turbine blade pressure measuring device and model pipe length correcting device |
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| Publication Number | Publication Date |
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| CN210889217U true CN210889217U (en) | 2020-06-30 |
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|---|---|---|---|
| CN201921931884.7U Expired - Fee Related CN210889217U (en) | 2019-11-11 | 2019-11-11 | Wind tunnel test wind turbine blade pressure measuring device and model pipe length correcting device |
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| CN (1) | CN210889217U (en) |
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2019
- 2019-11-11 CN CN201921931884.7U patent/CN210889217U/en not_active Expired - Fee Related
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Granted publication date: 20200630 |