CN206488825U - Fairing - Google Patents
Fairing Download PDFInfo
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- CN206488825U CN206488825U CN201720071075.8U CN201720071075U CN206488825U CN 206488825 U CN206488825 U CN 206488825U CN 201720071075 U CN201720071075 U CN 201720071075U CN 206488825 U CN206488825 U CN 206488825U
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- cowling panel
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- 239000012530 fluid Substances 0.000 claims abstract description 65
- 238000011144 upstream manufacturing Methods 0.000 claims description 14
- 230000000694 effects Effects 0.000 description 15
- 238000005259 measurement Methods 0.000 description 6
- 230000009467 reduction Effects 0.000 description 4
- 230000008602 contraction Effects 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000004153 renaturation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Abstract
The utility model provides a kind of fairing, is arranged in body, including：The direction for flowing through body along fluid sets gradually multiple cowling panels, wherein, the aperture for the plate hole being provided with each cowling panel between plate hole, and multiple cowling panels is different from each other.The purpose of this utility model, which is that offer is a kind of, can carry out the fairing of multi-stage rectifying.
Description
Technical field
The utility model is related to rectifier technical field, more specifically, is related to a kind of fairing.
Background technology
Domestic and international achievement in research shows, during fluid flow metering, for example, during gas metering, orifice plate
Flowmeter, ultrasonic flowmeter and turbine flowmeter etc. require that gas has preferable fluidised form accurately to measure, but specific
In, particularly in industrial settings, in the disturbance of the various choked flow pieces of ducts upstream (elbow, valve, reduced pipe, manifold etc.)
Under, the Flow Field Distribution in downstream line can be difficult to distortion and the vortex predicted, now the flow velocity of any pipeline section is all
It is different and change at any time.This straight-run of pipe section for being accomplished by growing can just return to uniform and stable abundant development pipe stream very much.Compared with
Long straight length requirement can undoubtedly waste conduit resource, and seriously take installing space.Generally use rectifier both at home and abroad at present
(or flow conditioner) eliminates this interference, to shorten flow development length and improve the accuracy of measuring.But, at present mostly
Number rectifier only passes through a rectification, and the rectification of stream field serves certain effect really, but its rectification effect is poor, weight
Renaturation is low.
Utility model content
For problem present in correlation technique, the purpose of this utility model is that multi-stage rectifying can be carried out by providing one kind
Fairing.
To achieve the above object, the utility model provides a kind of fairing, is arranged in body, including：Along fluid
The direction for flowing through body sets gradually multiple cowling panels, wherein, be provided with plate hole on each cowling panel, and multiple cowling panels it
Between plate hole aperture it is different from each other.
According to one embodiment of the present utility model, the direction of body is flowed through along fluid, positioned at the plate of the cowling panel of upstream
The aperture in hole is more than the aperture of the plate hole of the cowling panel positioned at downstream.
According to one embodiment of the present utility model, the direction of body is flowed through along fluid, positioned at the plate of the cowling panel of upstream
The quantity in hole is less than the quantity of the plate hole of the cowling panel positioned at downstream.
According to one embodiment of the present utility model, the direction of body is flowed through along fluid, positioned at most upstream cowling panel with
The distance between entrance of body is more than or equal to 0.5D；Between the cowling panel and the sensor that is arranged on body of most downstream
Distance in the range of 1D to 2D, wherein, D be body diameter.
According to one embodiment of the present utility model, the scope of the spacing L between adjacent cowling panel is：1.1D≥L≥
0.5D, wherein, D is the diameter of body.
According to one embodiment of the present utility model, the direction that multiple cowling panels include flowing through body along fluid is set gradually
First order cowling panel, second level cowling panel and third level cowling panel.
According to one embodiment of the present utility model, the hole area sum and body of whole plate holes on first order cowling panel
Internal diameter area ratio 2:5 to 4:In the range of 5；The diameter of plate hole is in the range of 0.15D to 0.2D；First order cowling panel
Thickness and body internal diameter ratio in the range of 0.1D to 0.6D, wherein, D be body diameter.
According to one embodiment of the present utility model, the hole area sum and body of whole plate holes on the cowling panel of the second level
Internal diameter area ratio 2:5 to 4:In the range of 5；The diameter of plate hole is in the range of 0.1D to 0.15D；Second level cowling panel
Thickness and body internal diameter ratio in the range of 0.1D to 0.15D, wherein, D be body diameter.
According to one embodiment of the present utility model, the hole area sum and body of whole plate holes on third level cowling panel
Internal diameter area ratio 2:5 to 4:In the range of 5；The diameter of plate hole is in the range of 0.05D to 0.1D；Third level cowling panel
Thickness and body internal diameter ratio in the range of 0.1D to 0.15D, wherein, D be body diameter.
According to one embodiment of the present utility model, communicated with each other between adjacent cowling panel by bushing pipe.
Advantageous effects of the present utility model are：
The fairing that the utility model is related to, multiple cowling panels are set gradually by flowing through the direction of body along fluid,
, when fluid passes through cowling panel, local contraction, a fluid stream collection can will be produced to carrying out multi-stage rectifying by the fluid of fairing
In, flow velocity increase, static pressure reduction, fluid will be balanced rectification, and vortex is minimized, and form the Uniform Flow stream of approximate ideal
State and flow pattern；Also, the plate hole aperture of multiple cowling panels is different from each other, remaining smaller eddy flow and bias current can be adjusted to equal
The fluid of even stabilization.
Brief description of the drawings
Fig. 1 is the scheme of installation according to the utility model one embodiment fairing.
Embodiment
Below with reference to accompanying drawing, embodiment of the present utility model is described in detail.
As shown in figure 1, one embodiment of the present utility model provides a kind of fairing.The fairing is arranged on pipe
In body 12, and the direction that the fairing includes flowing through body 12 along fluid sets gradually multiple cowling panels 14, wherein, each
The aperture for the plate hole 16 being provided with cowling panel 14 between plate hole 16, and multiple cowling panels 14 is different from each other.
The fairing that above-described embodiment is related to, multiple cowling panels are set gradually by flowing through the direction of body 12 along fluid
14, can to carrying out multi-stage rectifying by the fluid of fairing, when fluid passes through cowling panel 14, will produce local contraction,
A fluid stream is concentrated, and flow velocity increase, static pressure reduction, fluid will be balanced rectification, and vortex is minimized, and form the uniform of approximate ideal
Flow fluidised form and flow pattern；Also, the aperture of the plate hole 16 of multiple cowling panels 14 is different from each other, can by remaining smaller eddy flow and
Bias current is adjusted to uniform and stable fluid.
According to one embodiment of the present utility model, the direction of body 12 is flowed through along fluid, the cowling panel 14 positioned at upstream
Plate hole 16 aperture be more than positioned at downstream cowling panel 14 plate hole 16 aperture.So, by the way that plate hole 16 is gradually reduced
Aperture, can be adjusted to uniform and stable fluid by remaining smaller eddy flow and bias current again.
Further, according to one embodiment of the present utility model, the direction of body 12 is flowed through along fluid, positioned at upstream
The quantity of the plate hole 16 of cowling panel 14 is less than the quantity of the plate hole 16 of the cowling panel 14 positioned at downstream.
According to one embodiment of the present utility model, the direction of body 12 is flowed through along fluid, the cowling panel positioned at most upstream
14 are more than or equal to 0.5D with the distance between the entrance of body 12；Cowling panel 14 positioned at most downstream is with being arranged on body 12
The distance between sensor 18 in the range of 1D to 2D, wherein, D be body 12 diameter.
Fluid passes through after fairing, is measured by sensor 18, cowling panel of the sensor 18 apart from most downstream
14 have certain distance, preferably 1D to 2D.Because the fluid come out from the cowling panel 14 of most downstream is jet state, it is necessary to pass through one
Duan Zhiguan free settlings are mixed, and are formed one and are well mixed stable Flow Field Distribution state, just sensor 18 can be enable to perceive
The true flow velocity of fluid.Shown by a large amount of analog simulation results, because the aperture of afterbody orifice plate is smaller, apart from rectification
When the distance of inner hole plate is not less than 1D, gas flow pattern may be at stable uniform admixture；When apart from ＞ 2D, it can increase again
Plus the length of detected fluid body or flowmeter, waste body resource and measurement apparatus volume.Therefore, of the present utility model one
In individual preferred embodiment, it is positioned at the distance between cowling panel 14 and sensor 18 for being arranged on body 12 of most downstream
1.5D。
According to one embodiment of the present utility model, the scope of the spacing L between adjacent cowling panel 14 is：1.1D≥L≥
0.5D, wherein, D is the diameter of body 12.So, gas is flowed through after previous cowling panel 14, equivalent to being flowed in body 12
The buffering evolution of body, adjacent jets are mutually mixed so that Flow Field Distribution is more uniform.Preferably, in one embodiment,
Spacing L between adjacent cowling panel 14 is 0.8D.Certainly, the spacing L between adjacent cowling panel 14 can be according to specifically used feelings
Condition and change, the utility model is not limited to this.
According to one embodiment of the present utility model, multiple cowling panels 14 include flowing through the direction of body 12 successively along fluid
First order cowling panel 20, second level cowling panel 22 and the third level cowling panel 24 of setting.
According to one embodiment of the present utility model, hole area sum and the pipe of whole plate holes on first order cowling panel 20
The internal diameter area ratio of body 12 is 2:5 to 4:In the range of 5；The diameter of plate hole is in the range of 0.15D to 0.2D；The first order is whole
The ratio of internal diameter of thickness and the body 12 of plate 20 is flowed in the range of 0.1D to 0.6D, wherein, D is the diameter of body 12.
So, the fluid of Non-Uniform Flow can be sufficiently expressed in plate hole 16, enables a fluid to sufficiently mixing,
Obtain homogeneous (uniform) fluid.If the thickness of first order cowling panel 20 is too small, injection effect can be caused not when the aperture of plate hole 16 is larger
It is good, do not have the effect for eliminating eddy flow；If the thickness of first order cowling panel 20 is too big, the pressure loss can be increased again.Cause
This, it is preferable that the thickness of first order cowling panel 20 is 0.5D.
According to one embodiment of the present utility model, hole area sum and the pipe of whole plate holes on second level cowling panel 22
The internal diameter area ratio of body 12 is 2:5 to 4:In the range of 5；The diameter of plate hole is in the range of 0.1D to 0.15D；The second level is whole
The ratio of internal diameter of thickness and the body 12 of plate 22 is flowed in the range of 0.1D to 0.15D, wherein, D is the diameter of body 12.This
Sample, two pole cowling panels 22 can will be adjusted to uniform steady by smaller eddy flow remaining in the fluid of one-level cowling panel 20 and bias current
Fixed fluid.
According to one embodiment of the present utility model, hole area sum and the pipe of whole plate holes on third level cowling panel 24
The internal diameter area ratio of body 12 is 2:5 to 4:In the range of 5；The diameter of plate hole is in the range of 0.05D to 0.1D；The third level is whole
The ratio of internal diameter of thickness and the body 12 of plate 24 is flowed in the range of 0.1D to 0.15D, wherein, D is the diameter of body 12.This
Sample, triodic rectifier plate 24 can will be adjusted to uniform steady by smaller eddy flow remaining in the fluid of two grades of cowling panels 22 and bias current
Fixed fluid.
According to one embodiment of the present utility model, communicated with each other between adjacent cowling panel 14 by bushing pipe 26.Bushing pipe
26 can be isolated multiple cowling panels 14, form multi-stage rectifying space structure.
As shown in figure 1, one embodiment of the present utility model provides a kind of fairing, by two-stage or two-stage above rectification
Plate 14 is constituted.Wherein, the fluid in body 12 enters after fairing, passes sequentially through one-level cowling panel 20, second level cowling panel
22nd, three-level (or more than three-level) cowling panel 24.When fluid passes through cowling panel 14, local contraction, a fluid stream will be produced and concentrated, flow velocity
Increase, static pressure reduction, fluid will be balanced rectification, and vortex is minimized, can be formed approximate ideal Uniform Flow fluidised form and
Flow pattern.
By the fluid of cowling panel 14 after extruding, jet and mixing, the VELOCITY DISTRIBUTION meeting in flow area is flowed
Tend to be uniform.
In one further embodiment, fairing also includes, and bushing pipe 26 can also be set between cowling panel 14.
Bushing pipe 26 can be isolated multiple cowling panels 14, form multi-stage rectifying space structure.
Further, in the fairing that one embodiment is related to, the aperture of the plate hole of multilayer cowling panel 14 and body
12 diameter D ratio is reduced successively from upstream to downstream, by the way that aperture is gradually reduced, again by remaining smaller eddy flow and partially
Stream is adjusted to uniform and stable fluid.That is, from upstream to downstream, the plate hole aperture of cowling panel 14 is sequentially reduced.
The plate hole structure of cowling panel 14 can be the structures such as triangle, square, polygon, circle hole shape, honeycombed, multistage
The plate hole structure of cowling panel 14 be able to can also be differed with identical.Each aperture of plate hole per one-level cowling panel can with identical,
Can also be different.
The plate hole of cowling panel 14 can align setting, can also not line up setting.
Further, the fairing can be located at the upstream of sensor 18, can also be with sensor group into an entirety
Equipment.
The plate hole of one-level cowling panel 20 can be equally distributed hole or the cause not of uniform size that is centrosymmetric
Hole.Plate hole 16 is preferably to be uniformly distributed, and the advantage of equally distributed plate hole 16 is：When fluid enters fairing, the speed of fluid
It is uniform to spend distribution, and asymmetric to aggravate the inhomogeneities of VELOCITY DISTRIBUTION, it is advantageous to be uniformly distributed.
The plate hole area sum of whole plate holes 16 of one-level cowling panel 20 and the measurement internal diameter area ratio about 2 of body 12:5 to
4：5, preferably 3:5.The reasons why number range, is mainly balance rectification effect and the pressure loss.On the one hand, area than it is too small when,
The pressure loss is larger.On the other hand, hole area than it is too big when, again can be because reduction to fluid barrier effect, influence rectification effect
Really.
The thickness of one-level cowling panel 20 is 0.1 to 0.6D, preferably 0.5D, is the reasons why this specifically chosen number range：
The fluid of Non-Uniform Flow is sufficiently expressed in hole, sufficiently mixing is enabled a fluid to, obtains homogeneous (uniform) fluid.One-level rectification
The thickness of plate 20 is too thin, and injection effect is not good when the aperture of plate hole 16 is larger, does not have the effect for eliminating eddy flow；Thickness is too thick, again
The pressure loss can be increased, consider, the scope that the thickness proportion of one-level cowling panel 20 is suitable is 0.1 to 0.6D, effect
Most preferably 0.5D.
The main function of two grades of cowling panels 22：Because larger eddy flow and bias current are done basic place by one-level cowling panel 20
Remaining smaller eddy flow and bias current are adjusted to uniform and stable by reason, two grades of cowling panels 22 again by reducing the aperture of plate hole 16
Fluid.
The plate hole area sum of whole plate holes of two grades of cowling panels 22 compares 2 with footpath area in measurement pipe body:5 to 4:5, preferably
3:5, reason is：On the one hand it is because area ratio is less than 2:When 5, the pressure loss is larger；Area than it is too big when, do not have again whole
The effect of stream；In addition, area ratio is 2:5 to 4：During 5 scope, the rectification effect of fluid is more or less the same, balance rectification effect and
The factors such as crushing, preferably 3:5.
The honeycomb-shaped structure that two grades of cowling panels 22 are perfectly even distributed.It is other shapes because honeycomb-shaped structure compares
Pore structure, can have larger hole area.
The thickness of two grades of cowling panels 22 is not limited.To ensure the intensity of two grades of structures of cowling panel 22, it is preferable that two grades whole
The thickness range of discharge orifice plate is 0.1 to 0.15D, preferably 0.12D.
The diameter of the plate hole structure of three-level cowling panel 24 is about 0.05 to 0.1D, preferably 0.06D.By reduced bore, then
It is secondary that remaining smaller eddy flow and bias current are adjusted to uniform and stable fluid.
The plate hole area sum of whole plate holes of three-level cowling panel 24 and the internal diameter area ratio about 2 of measurement body 12:5 to
4：5, preferably 3:5.
The thickness of three-level cowling panel 24 is not limited.To ensure the intensity of the structure of three-level cowling panel 24, it is preferable that three-level is whole
It is 0.1 to 0.15D, preferably 0.12D to flow the thickness of plate 24 and the ratio of measurement internal diameter of tube body.
The number of the plate hole of multiple cowling panels 14 does not require that the preferably plate hole number of downstream cowling panel is whole no less than upstream
Flow the plate hole number of plate.Because the plate hole number of downstream cowling panel is more, then rectification hole is more, is more beneficial for the smaller of remnants
Eddy flow and bias current are adjusted to uniform and stable fluid, on the other hand, and rectification hole number is more, advantageously reduces crushing.
Air-flow passes through after fairing, is measured by sensor 18, cowling panel of the sensor 18 apart from most downstream
14 have certain distance, most preferably preferably 1D to 2D, 1.5D.Reason is：The fluid that the cowling panel 14 of most downstream comes out is jet-like
State, it is necessary to by straight-run of pipe free settling mixing, forms one and is well mixed stable Flow Field Distribution state, can just make sensing
Device 18 can perceive the true flow velocity of fluid.Shown by a large amount of analog simulation results, due to the plate of the cowling panel 14 of most downstream
Hole aperture is smaller, and when the distance of the cowling panel 14 apart from most downstream is not less than 1D, fluid flow state may be at the uniform of stabilization
Admixture；When apart from ＞ 2D, the length of detected fluid body or flowmeter can be increased again, body resource is wasted and measurement is filled
Put volume.
Spacing range between cowling panel 14 is 1.1D >=L >=0.5D, and preferably 0.8D, wherein D are internal diameter of tube body, and L is phase
The spacing of adjacent two cowling panels 14.Because, fluid stream is after previous cowling panel 14, equivalent to fluid cushion in bushing pipe 26
Evolution, adjacent jets are mutually mixed so that Flow Field Distribution is more uniform.In theory, L is bigger, and effect is more obvious, but
It is in actual applications, because body total length is limited, preferably to take 0.8D.
Above-described embodiment to fluid by carrying out multi-stage rectifying so that fluid forms uniform and stable after fairing
Flow field, so that flow sensor detection is more accurate.
Preferred embodiment of the present utility model is the foregoing is only, the utility model is not limited to, for this
For the technical staff in field, the utility model can have various modifications and variations.It is all it is of the present utility model spirit and principle
Within, any modification, equivalent substitution and improvements made etc. should be included within protection domain of the present utility model.
Claims (10)
1. a kind of fairing, is arranged in body (12), it is characterised in that including：The body (12) is flowed through along fluid
Direction sets gradually multiple cowling panels (14),
Wherein, the plate hole between plate hole (16), and the multiple cowling panel (14) is provided with each cowling panel (14)
(16) aperture is different from each other.
2. fairing according to claim 1, it is characterised in that the direction of the body (12), position are flowed through along fluid
It is more than the plate hole (16) of the cowling panel (14) positioned at downstream in the aperture of the plate hole (16) of the cowling panel (14) of upstream
Aperture.
3. fairing according to claim 1, it is characterised in that the direction of the body (12), position are flowed through along fluid
It is less than the plate hole (16) of the cowling panel (14) positioned at downstream in the quantity of the plate hole (16) of the cowling panel (14) of upstream
Quantity.
4. fairing according to claim 1, it is characterised in that the direction of the body (12), position are flowed through along fluid
It is more than or equal to 0.5D in the distance between entrance of the cowling panel (14) and the body (12) of most upstream；
The distance between described cowling panel (14) and the sensor (18) that is arranged on the body (12) positioned at most downstream exist
In the range of 1D to 2D, wherein, D is the diameter of the body (12).
5. fairing according to claim 1, it is characterised in that spacing L's between the adjacent cowling panel (14)
Scope is：1.1D >=L >=0.5D, wherein, D is the diameter of the body (12).
6. fairing according to claim 1, it is characterised in that the multiple cowling panel (14) includes flowing through along fluid
First order cowling panel (20), second level cowling panel (22) and third level cowling panel that the direction of the body (12) is set gradually
(24)。
7. fairing according to claim 6, it is characterised in that whole plate holes on the first order cowling panel (20)
Hole area sum and the body (12) internal diameter area ratio 2:5 to 4:In the range of 5；
The diameter of the plate hole is in the range of 0.15D to 0.2D；
The ratio of the thickness of the first order cowling panel (20) and the internal diameter of the body (12) in the range of 0.1D to 0.6D, its
In, D is the diameter of the body (12).
8. fairing according to claim 6, it is characterised in that whole plate holes on the second level cowling panel (22)
Hole area sum and the body (12) internal diameter area ratio 2:5 to 4:In the range of 5；
The diameter of the plate hole is in the range of 0.1D to 0.15D；
The ratio of the thickness of the second level cowling panel (22) and the internal diameter of the body (12) in the range of 0.1D to 0.15D,
Wherein, D is the diameter of the body (12).
9. fairing according to claim 6, it is characterised in that whole plate holes on the third level cowling panel (24)
Hole area sum and the body (12) internal diameter area ratio 2:5 to 4:In the range of 5；
The diameter of the plate hole is in the range of 0.05D to 0.1D；
The ratio of the thickness of the third level cowling panel (24) and the internal diameter of the body (12) in the range of 0.1D to 0.15D,
Wherein, D is the diameter of the body (12).
10. fairing according to claim 1, it is characterised in that pass through lining between the adjacent cowling panel (14)
Pipe (26) communicates with each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720071075.8U CN206488825U (en) | 2017-01-20 | 2017-01-20 | Fairing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720071075.8U CN206488825U (en) | 2017-01-20 | 2017-01-20 | Fairing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206488825U true CN206488825U (en) | 2017-09-12 |
Family
ID=59766350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720071075.8U Active CN206488825U (en) | 2017-01-20 | 2017-01-20 | Fairing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206488825U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109364754A (en) * | 2018-12-27 | 2019-02-22 | 东风商用车有限公司 | A kind of preprocessing system of SCR catalyst device |
| CN109550417A (en) * | 2017-09-25 | 2019-04-02 | 国家电投集团科学技术研究院有限公司 | Drop generating device |
| CN110170061A (en) * | 2018-02-20 | 2019-08-27 | 斯坦雷电气株式会社 | Fluid processing equipment with multiple cowling panels |
| CN110426097A (en) * | 2019-08-07 | 2019-11-08 | 西安航天动力试验技术研究所 | A kind of big flow cryogenic propellant supply line flow conditioner |
| CN111077345A (en) * | 2019-12-20 | 2020-04-28 | 西安航天动力研究所 | Mach number calibration method under high-temperature supersonic velocity pure gas flow field environment |
| CN114440999A (en) * | 2022-04-11 | 2022-05-06 | 江苏高凯精密流体技术股份有限公司 | Flow-equalizing sleeve and flow meter equipped with same |
-
2017
- 2017-01-20 CN CN201720071075.8U patent/CN206488825U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109550417A (en) * | 2017-09-25 | 2019-04-02 | 国家电投集团科学技术研究院有限公司 | Drop generating device |
| CN110170061A (en) * | 2018-02-20 | 2019-08-27 | 斯坦雷电气株式会社 | Fluid processing equipment with multiple cowling panels |
| CN109364754A (en) * | 2018-12-27 | 2019-02-22 | 东风商用车有限公司 | A kind of preprocessing system of SCR catalyst device |
| CN109364754B (en) * | 2018-12-27 | 2024-03-19 | 东风商用车有限公司 | Pretreatment system of SCR catalyst device |
| CN110426097A (en) * | 2019-08-07 | 2019-11-08 | 西安航天动力试验技术研究所 | A kind of big flow cryogenic propellant supply line flow conditioner |
| CN111077345A (en) * | 2019-12-20 | 2020-04-28 | 西安航天动力研究所 | Mach number calibration method under high-temperature supersonic velocity pure gas flow field environment |
| CN114440999A (en) * | 2022-04-11 | 2022-05-06 | 江苏高凯精密流体技术股份有限公司 | Flow-equalizing sleeve and flow meter equipped with same |
| CN114440999B (en) * | 2022-04-11 | 2022-06-21 | 江苏高凯精密流体技术股份有限公司 | Flow-equalizing sleeve and flow meter equipped with same |
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