CN106248345B - A kind of pipeline flow field swirl intensity measuring device and its measurement method - Google Patents
A kind of pipeline flow field swirl intensity measuring device and its measurement method Download PDFInfo
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- CN106248345B CN106248345B CN201610915015.XA CN201610915015A CN106248345B CN 106248345 B CN106248345 B CN 106248345B CN 201610915015 A CN201610915015 A CN 201610915015A CN 106248345 B CN106248345 B CN 106248345B
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- tachymeter
- seat
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M10/00—Hydrodynamic testing; Arrangements in or on ship-testing tanks or water tunnels
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Abstract
A kind of pipeline flow field swirl intensity measuring device, including measuring seat and tachymeter, measurement seat external form is cylindrical structure, the center line for measuring seat is arranged along left and right horizontal, the left end for measuring seat is connected with left pipeline connector by left attaching nut, the right end for measuring seat is connected with right pipeline connector by right attaching nut, it measures seat outer wall and radially offers penetrating jack, the outer wall for measuring seat is fixed with the cylinder boss with central through hole, the center line of central through hole is overlapped with the center line of jack, tachymeter ecto-entad sequentially passes through central through hole and jack and extend into and measures in seat, tachymeter outer surface is equipped with radial scale strip along the centerline direction for being parallel to central through hole；The configuration of the present invention is simple, it is easy to operate, can pass through measurement means calculate pipeline rotational flow intensity inside.
Description
Technical field
The invention belongs to fluid intensity technical field of measurement and test, and in particular to a kind of pipeline flow field swirl intensity measuring device and
Its measurement method.
Background technology
Eddy flow is a kind of flow phenomenon being widely present, eddy flow have with axial velocity magnitude quite even higher numerical value
Tangential velocity flow field.The generation of eddy flow make flow field by simple axial flowing be changed to it is axial flow and tangential flow exists jointly,
Whirlpool is formed in flow field, is industrially frequently utilized that the perturbation action of eddy flow realizes that material is sufficiently mixed or material is defeated over long distances
It send, has application in fields such as fluid conveying, fluidics, combustion technology, cyclonic separation and scroll sand discharges.
Swirl strength is the dimensionless number for characterizing eddy flow degree of strength, to the VELOCITY DISTRIBUTION of eddy flow, volume pipette, angle of flare,
Velocity attenuation all has larger impact, and swirl strength is defined as the ratio of tangential momentum square and axial momentum square, using integral
Form obtains, and is determined typically only by theoretical calculation and numerical simulation.In practical applications, it not yet realizes by measuring hand
Section determines practical swirl strength, therefore the conclusion of theoretical calculation and numerical simulation is difficult to be verified, and limits in industry to rotation
The control and utilization of stream, also constrain the further investigation to swirl strength.
Invention content
The present invention in order to solve shortcoming in the prior art, provide it is a kind of it is simple in structure, easy to operate, can pass through
Measurement means calculate the pipeline flow field swirl intensity measuring device and its measurement method of pipeline rotational flow intensity inside.
In order to solve the above technical problems, the present invention adopts the following technical scheme that：A kind of pipeline flow field swirl strength measures dress
It sets, including measures seat and tachymeter, measurement seat external form is cylindrical structure, and the center line for measuring seat is arranged along left and right horizontal, surveys
The left end of amount seat is connected with left pipeline connector by left attaching nut, and the right end for measuring seat is connected with right pipe by right attaching nut
Road connector measures seat outer wall and radially offers penetrating jack, and the outer wall for measuring seat is fixed with central through hole
Cylinder boss, the center line of central through hole overlaps with the center line of jack, and tachymeter ecto-entad sequentially passes through central through hole
It is measured in seat with jack and extending into, tachymeter outer surface is equipped with radial scale along the centerline direction for being parallel to central through hole
Item, tachymeter are arranged with the clamp jaw positioned at cylinder boss outer end face outside, and sealing ring, cylinder are equipped between clamp jaw and tachymeter
Boss external screw-thread is connected with the fixing nut for fixing to clamp pawl, and the outer end face of fixing nut is equipped with four scale slots,
Four scale slots are evenly arranged along the circumferencial direction of fixing nut, wherein the length direction of a scale slot is along the axial direction for measuring seat
Direction is arranged；
The left side for measuring seat is fixed with pointer, its circumferencial direction of left pipeline connector upper edge is equipped with the circumferential scale strip of a circle,
The left end of pointer is directed toward circumferential scale strip.
The outer wall mating surface of fixing nut inner wall and clamp jaw is conical structure, and clamp jaw edge is parallel to central through hole
Centerline direction offers several deflation slots, tightens slot and is evenly arranged along the circumferencial direction of clamp jaw.
A kind of measurement method of pipeline flow field swirl intensity measuring device, includes the following steps：
（1）Measuring device is installed：The left side of the left pipeline connector of the present apparatus and pipe under test is connected, the right pipe of the present apparatus
The right side of road connector and pipe under test connects, wherein the internal diameter for measuring seat is identical as the internal diameter of pipe under test；
（2）Tachymeter is installed：Tachymeter is sequentially inserted into central through hole and jack and extend into and is measured in seat, is tightened
Nut makes the deflation slot reduced width of clamp jaw, and to clamp tachymeter, wherein one of scale slot is along measurement seat at this time
Axial direction is arranged；
（3）Sliding-model control swirl strength formula：According to the definition of swirl strength, the numerical value of swirl strength is by formula , wherein R is the radius of pipe under test, and r is distance of the tested point apart from pipe under test center line,It is to be measured
The axial velocity of point,For the tangential velocity of tested point；It is determined by integrating, by formulaSliding-model control is carried out, obtaining can be with
The formula of swirl strength is calculated by the axial velocity and tangential velocity of multiple discrete points
, wherein radial scale strip
Graduation mark is N equal portions, and the graduation mark of circumferential scale strip is 2M equal portions；
（4）Measure and record the axial velocity and tangential velocity of multiple discrete points；The graduation mark of radial scale strip is 1,2,
3 ... ..., N are total up to N equal portions, and the graduation mark of circumferential scale strip is 1,2,3 ... ..., 2M, in total 2M equal portions, when pointer is directed toward
When the graduation mark m of circumferential scale strip, the m=1, adjustment tachymeter makes the graduation mark n of the radial scale strip on tachymeter, n=1,
Then it reads and records tested point at this time（M=1, n=1）Axial velocity, tachymeter is rotated by 90 ° around its center line later, is obtained
To tested point at this time（M=1, n=1）Tangential velocity, and the tangential velocity is recorded, is again rotated by 90 ° tachymeter；It connects
Adjustment tachymeter makes graduation mark n=2 of the radial scale strip on tachymeter, then reads and records tested point at this time（M=1, n=
2）Axial velocity, tachymeter is rotated by 90 ° around its center line later, obtains tested point at this time（M=1, n=2）Tangential velocity,
And the tangential velocity is recorded, tachymeter is rotated by 90 ° again；
Aforesaid operations are repeated, tested point is obtained（M=1, n=3）,（M=1, n=4）... ...,（M=1, n=N）Axial velocity and
Tangential velocity, and record；
Then wheel measuring seat makes pointer be directed toward graduation mark m=2 of circumferential scale strip, then repeatedly aforesaid operations, obtains
Tested point（M=2, n=1）,（M=2, n=2）,（M=2, n=3）... ...,（M=2, n=N）Axial velocity and tangential velocity, and record
Get off；
Aforesaid operations are repeated, obtain tested point successively（M, n）Axial velocity and tangential velocity；
（5）By all tested points for measuring and recording（M, n）Axial velocity and tangential velocity bring formula into, waited for
The swirl strength in test tube road.
Above-mentioned technical proposal is used, the invention has the advantages that：The present apparatus by the calculation formula of swirl strength into
Row sliding-model control is calculated by measuring the axial velocity and tangential velocity of multiple tested points in the circle of pipe under test section
The tangential momentum square and axial momentum square of each tested point, then read group total is carried out, finally obtain the swirl strength in pipeline；Wherein
The outer wall mating surface of fixing nut inner wall and clamp jaw is conical structure, and clamp jaw is along the center line side for being parallel to central through hole
To several deflation slots are offered, this special designing makes fixing nut clamp tachymeter；It is convenient that this measurement method measures, and is suitble to
It promotes and uses in commercial Application.
Wherein swirl intensity measuring device is attached using screw thread with pipeline, installation, convenient disassembly, can be in the duct
Arbitrary joint location installation, it is flexible to measure position.Measuring seat can be by rotating the speed realized to different angle radial direction
It measures, tachymeter can realize that the tachometric survey to tested point on different radii, the two are combined, be may be implemented by radial expansion
The tachometric survey for justifying interior arbitrary point to whole cross section, has many advantages, such as that simple in structure, easy to carry, measurement range is big, with eddy flow
Intensity discretization calculation formula is combined, can with the swirl strength in accurate determining pipeline flow field, can to commercial Application and
Theoretical research provides foundation.
Description of the drawings
Fig. 1 is the structural schematic diagram of the present invention；
Fig. 2 is the vertical view of Fig. 1；
Fig. 3 is the enlarged drawing at A in Fig. 1；
Fig. 4 is the enlarged drawing at B in Fig. 2；
Fig. 5 is the position view of tested point.
Specific implementation mode
As shown in Figs. 1-5, a kind of pipeline flow field swirl intensity measuring device of the invention, including measure seat 1 and tachymeter
2, tachymeter 2 is flow sensor, is existing common speed instrument, and measurement 1 external form of seat is cylindrical structure, measures seat 1
Center line is arranged along left and right horizontal, and the left end for measuring seat 1 is connected with left pipeline connector 4 by left attaching nut 3, measures seat 1
Right end is connected with right pipeline connector 6 by right attaching nut 5, measures 1 outer wall of seat and radially offers penetrating jack 7,
The outer wall for measuring seat 1 is fixed with the cylinder boss 8 with central through hole 10, and cylinder boss 8 is made into integration with seat 1 is measured, in
The center line of heart through-hole 10 is overlapped with the center line of jack 7, and 2 ecto-entad of tachymeter sequentially passes through central through hole 10 and jack 7
And extend into and measure in seat 1,2 outer surface of tachymeter is equipped with radial scale strip 9 along the centerline direction for being parallel to central through hole, surveys
It is arranged with the clamp jaw 11 positioned at 8 outer end face of cylinder boss outside fast instrument 2, sealing ring 12 is equipped between clamp jaw 11 and tachymeter 2,
8 external screw-thread of cylinder boss is connected with the fixing nut 13 for fixing to clamp pawl 11, and the outer end face of fixing nut 13 is equipped with
Equipped with four scale slots 14, four scale slots 14 are evenly arranged along the circumferencial direction of fixing nut 13, wherein a scale slot 14
Length direction along measure seat 1 axial direction setting.
The left side for measuring seat 1 is fixed with pointer 15 by screw 17, its circumferencial direction of 4 upper edge of left pipeline connector is equipped with one
The left end of the circumferential scale strip 16 of circle, pointer 15 is directed toward circumferential scale strip 16.
The outer wall mating surface of 13 inner wall of fixing nut and clamp jaw 11 is conical structure, and clamp jaw 11 is along being parallel to center
The centerline direction of through-hole offers several deflation slots, tightens slot and is evenly arranged along the circumferencial direction of clamp jaw 11.
The measurement method that pipeline flow field swirl strength is carried out using pipeline flow field strength meter, is included the following steps：
（1）Measuring device is installed：The left pipeline connector 4 of the present apparatus is connect with the left side of pipe under test, the right side of the present apparatus
Pipe joint 6 is connect with the right side of pipe under test, wherein the internal diameter for measuring seat 1 is identical as the internal diameter of pipe under test；
（2）Tachymeter 2 is installed：Tachymeter 2 is sequentially inserted into central through hole 10 and jack 7 and extend into and is measured in seat 1, rotation
Fastening nut 13 makes the deflation slot reduced width of clamp jaw 11, to clamp tachymeter 2, wherein the one of scale slot 14 at this time
Item is along the axial direction setting for measuring seat 1；
（3）Sliding-model control swirl strength formula：According to the definition of swirl strength, the numerical value of swirl strength is by formula , wherein R is the radius of pipe under test, and r is distance of the tested point apart from pipe under test center line,To wait for
The axial velocity of measuring point,For the tangential velocity of tested point；It is determined by integrating, by formulaSliding-model control is carried out, obtaining can
The formula of swirl strength to be calculated by the axial velocity and tangential velocity of multiple discrete points
, wherein radial scale strip 9
Graduation mark is N equal portions, and the graduation mark of circumferential scale strip 16 is 2M equal portions；
（4）Measure and record the axial velocity and tangential velocity of multiple discrete points；The graduation mark of radial scale strip 9 is 1,2,
3 ... ..., N are total up to N equal portions, and the graduation mark of circumferential scale strip 16 is 1,2,3 ... ..., 2M, in total 2M equal portions, when pointer 15
When the graduation mark m of direction circumferential direction scale strip 16, the m=1, adjustment tachymeter 2 makes the graduation mark of the radial scale strip 9 on tachymeter 2
Then n, n=1 read and record tested point at this time（M=1, n=1）Axial velocity, later by tachymeter 2 around its center line revolve
Turn 90 °, obtains tested point at this time（M=1, n=1）Tangential velocity, and the tangential velocity is recorded, again by tachymeter 2
It is rotated by 90 °；Then adjustment tachymeter 2 makes graduation mark n=2 of the radial scale strip 9 on tachymeter 2, then reads and records at this time
Tested point（M=1, n=2）Axial velocity, tachymeter 2 is rotated by 90 ° around its center line later, obtains tested point at this time（M=1, n
=2）Tangential velocity, and the tangential velocity is recorded, is again rotated by 90 ° tachymeter 2；
Aforesaid operations are repeated, tested point is obtained（M=1, n=3）,（M=1, n=4）... ...,（M=1, n=N）Axial velocity and
Tangential velocity, and record；
Then wheel measuring seat 1 makes pointer 15 be directed toward graduation mark m=2 of circumferential scale strip 16, then repeatedly aforesaid operations,
Obtain tested point（M=2, n=1）,（M=2, n=2）,（M=2, n=3）... ...,（M=2, n=N）Axial velocity and tangential velocity, and
It records；
Aforesaid operations are repeated, obtain tested point successively（M, n）Axial velocity and tangential velocity；
（5）By all tested points for measuring and recording（M, n）Axial velocity and tangential velocity bring formula into, waited for
The swirl strength in test tube road.
The present embodiment is not to be made any form of restriction to shape, material, the structure etc. of the present invention, every according to this hair
Bright technical spirit belongs to the technology of the present invention side to any simple modification, equivalent change and modification made by above example
The protection domain of case.
Claims (3)
1. a kind of pipeline flow field swirl intensity measuring device, it is characterised in that：Including measuring seat and tachymeter, measuring seat external form is
Cylindrical structure, the center line for measuring seat are arranged along left and right horizontal, and the left end for measuring seat is connected with left pipe by left attaching nut
Road connector, the right end for measuring seat are connected with right pipeline connector by right attaching nut, measure seat outer wall and radially offer
Penetrating jack, the outer wall for measuring seat are fixed with the cylinder boss with central through hole, the center line and jack of central through hole
Center line overlap, tachymeter ecto-entad sequentially pass through central through hole and jack and extend into measure seat in, tachymeter appearance
Face is equipped with radial scale strip along the centerline direction for being parallel to central through hole, is arranged with positioned at cylinder boss outer end face outside tachymeter
Clamp jaw, sealing ring is equipped between clamp jaw and tachymeter, cylinder boss external screw-thread is connected with for fixing to clamp pawl
The outer end face of fixing nut, fixing nut is equipped with four scale slots, and four scale slots are uniform along the circumferencial direction of fixing nut
Arrangement, wherein the length direction of a scale slot is along the axial direction setting for measuring seat；
The left side for measuring seat is fixed with pointer, its circumferencial direction of left pipeline connector upper edge is equipped with the circumferential scale strip of a circle, pointer
Left end be directed toward circumferential scale strip.
2. a kind of pipeline flow field swirl intensity measuring device according to claim 1, it is characterised in that：Fixing nut inner wall
Outer wall mating surface with clamp jaw is conical structure, and clamp jaw offers several along the centerline direction for being parallel to central through hole
Tighten slot, tightens slot and be evenly arranged along the circumferencial direction of clamp jaw.
3. a kind of measurement method based on a kind of pipeline flow field as claimed in claim 2 swirl intensity measuring device, feature
It is：Include the following steps：
（1）Measuring device is installed：The left side of the left pipeline connector of the present apparatus and pipe under test is connected, the right pipeline of the present apparatus connects
Head is connect with the right side of pipe under test, wherein the internal diameter for measuring seat is identical as the internal diameter of pipe under test；
（2）Tachymeter is installed：Tachymeter is sequentially inserted into central through hole and jack and extend into and is measured in seat, be tightened nut
The deflation slot reduced width for making clamp jaw, to clamp tachymeter, wherein one of scale slot is along the axial direction for measuring seat at this time
Direction is arranged；
（3）Sliding-model control swirl strength formula：According to the definition of swirl strength, the numerical value of swirl strength is by formula , wherein R is the radius of pipe under test, and r is distance of the tested point apart from pipe under test center line,To wait for
The axial velocity of measuring point,For the tangential velocity of tested point；It is determined by integrating, by formulaSliding-model control is carried out, obtaining can
The formula of swirl strength to be calculated by the axial velocity and tangential velocity of multiple discrete points
, wherein the scale of radial scale strip
Line is N equal portions, and the graduation mark of circumferential scale strip is 2M equal portions；
（4）Measure and record the axial velocity and tangential velocity of multiple discrete points；The graduation mark of radial scale strip is 1,2,
3 ... ..., N are total up to N equal portions, and the graduation mark of circumferential scale strip is 1,2,3 ... ..., 2M, in total 2M equal portions, when pointer is directed toward
When the graduation mark m of circumferential scale strip, the m=1, adjustment tachymeter makes the graduation mark n of the radial scale strip on tachymeter, n=1,
Then it reads and records tested point at this time（M=1, n=1）Axial velocity, tachymeter is rotated by 90 ° around its center line later, is obtained
To tested point at this time（M=1, n=1）Tangential velocity, and the tangential velocity is recorded, is again rotated by 90 ° tachymeter；It connects
Adjustment tachymeter makes graduation mark n=2 of the radial scale strip on tachymeter, then reads and records tested point at this time（M=1, n=
2）Axial velocity, tachymeter is rotated by 90 ° around its center line later, obtains tested point at this time（M=1, n=2）Tangential velocity,
And the tangential velocity is recorded, tachymeter is rotated by 90 ° again；
Aforesaid operations are repeated, tested point is obtained（M=1, n=3）,（M=1, n=4）... ...,（M=1, n=N）Axial velocity and tangential
Speed, and record；
Then wheel measuring seat makes pointer be directed toward graduation mark m=2 of circumferential scale strip, then repeatedly aforesaid operations, obtains to be measured
Point（M=2, n=1）,（M=2, n=2）,（M=2, n=3）... ...,（M=2, n=N）Axial velocity and tangential velocity, and record
Come；
Aforesaid operations are repeated, obtain tested point successively（M, n）Axial velocity and tangential velocity；
（5）By all tested points for measuring and recording（M, n）Axial velocity and tangential velocity bring formula into, obtain waiting for test tube
The swirl strength in road.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610915015.XA CN106248345B (en) | 2016-10-20 | 2016-10-20 | A kind of pipeline flow field swirl intensity measuring device and its measurement method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610915015.XA CN106248345B (en) | 2016-10-20 | 2016-10-20 | A kind of pipeline flow field swirl intensity measuring device and its measurement method |
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| CN106248345B true CN106248345B (en) | 2018-08-10 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107228751B (en) * | 2017-07-24 | 2020-06-26 | 北京航空航天大学 | Jet flow experimental device for simulating leakage flow of blade tip of turbine |
| CN109063236B (en) * | 2018-06-19 | 2023-01-31 | 河北建筑工程学院 | Method for calculating diffusion angle of air conditioner air supply outlet by applying fractal dimension |
| CN110987362B (en) * | 2019-12-11 | 2021-08-31 | 宁波诺丁汉大学 | Vortex flow measuring device and measuring method |
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| CN201575830U (en) * | 2010-01-12 | 2010-09-08 | 兰州科庆仪器仪表有限责任公司 | Spiral flow meter |
| CN205148071U (en) * | 2015-11-10 | 2016-04-13 | 浙江工业大学 | Gu solution -air - online observation device in three -phase abrasive flow whirl flow field |
| DE102015221355A1 (en) * | 2014-10-31 | 2016-05-04 | Invensys Systems Inc. | VORTEX FLOWMETER FOR DIVIDED FLOWS |
| CN105731080A (en) * | 2016-04-07 | 2016-07-06 | 河南理工大学 | Bi-directionally adjusted multipurpose vortex flow swirler |
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2016
- 2016-10-20 CN CN201610915015.XA patent/CN106248345B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201575830U (en) * | 2010-01-12 | 2010-09-08 | 兰州科庆仪器仪表有限责任公司 | Spiral flow meter |
| DE102015221355A1 (en) * | 2014-10-31 | 2016-05-04 | Invensys Systems Inc. | VORTEX FLOWMETER FOR DIVIDED FLOWS |
| CN205148071U (en) * | 2015-11-10 | 2016-04-13 | 浙江工业大学 | Gu solution -air - online observation device in three -phase abrasive flow whirl flow field |
| CN105731080A (en) * | 2016-04-07 | 2016-07-06 | 河南理工大学 | Bi-directionally adjusted multipurpose vortex flow swirler |
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| Title |
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| 旋流强度对燃烧器出口附近颗粒碰撞数的影响;周勇等;《清华大学学报（自然科学版）》;20051231;第45卷(第2期);全文 * |
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