CN101832853B - Ridged flow-field test slab model - Google Patents
Ridged flow-field test slab model Download PDFInfo
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- CN101832853B CN101832853B CN2009100215021A CN200910021502A CN101832853B CN 101832853 B CN101832853 B CN 101832853B CN 2009100215021 A CN2009100215021 A CN 2009100215021A CN 200910021502 A CN200910021502 A CN 200910021502A CN 101832853 B CN101832853 B CN 101832853B
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- breadboard
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- test slab
- ridge
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Abstract
The invention discloses a ridged flow-field test slab model, which comprises a head, a test slab, a support rod and a connecting piece, wherein the surface of the test slab is processed into two ridged structures with different sizes and shapes; the head is aligned with the test slab through a wedge slot, the connecting piece is arranged at the connecting position of the head and the test slab, and screws are respectively screwed into the head and the test slab through the connecting piece so as to ensure the head and the test slab are connected closely; and the support rod is inserted into a through hole of the test slab so as to ensure the direction of the long axis of a diamond section of the support rod is consist with the axial direction of the test slab, and then the bearing rod is fixedly connected with the test slab through nuts. The ridged flow-field test slab model has the advantages of eliminating the influence of gravitational field by flatly arranging the slab model in the water, improving the consistency of the test conditions of different models and the accuracy of experimental study by adopting a split design, and greatly reducing the experiment workload and improving the working efficiency by processing the two ridged structures on the same test slab.
Description
Technical field
The present invention relates to a kind of flat plate model that is used for the test of submarine navigation device flow-field test, particularly relate to a kind of ridge-like structure flow-field test slab model.
Background technology
Ridge-like structure has the effect of drag reduction, and in order to understand fully its drag principle, flow field measurement technique is essential, is all carrying out many experimental studies aspect this both at home and abroad.Current flow-field test experiment is mainly carried out in water hole or wind-tunnel, and mostly the water hole empirical model is flat plate model, stands up during test in water, and mostly the wind tunnel experiment model is aerofoil profile or flat plate model.
The test of ridge-like structure flow-field test is the contrast experiment, when the model with different ridge-like structures is made an experiment, should guarantee the consistance in the outside flow field of different model surfaces.Therefore, test needs a series of test models with different ridge-like structures, and the experiment work amount is very big, and requires different test models other part except that ridge-like structure to have consistance as much as possible.
Treadmill test model in the existing experimental technique is whole machine-shaping, has following deficiency:
(1) flat plate model stands up in water, and the degree of depth of ridge-like structure in water is inconsistent, because the influence of gravity field causes the ridge-like structure surface flow field inconsistent.
(2) since the restriction of processing conditions to make that front end face, front end face and the junction, stage casing of different models can not guarantee fully consistent, cause different model outer flow field to be lack of consistency.
(3) single test can only be tested a kind of surface flow field of ridge-like structure, and work efficiency is lower.
Summary of the invention
This bright purpose is to provide a kind of ridge-like structure flow-field test slab model.This test slab model can not only increase substantially in test the comparability and the accuracy of experimental study, and has reduced the experiment work amount, has improved work efficiency.
Above-mentioned technical problem of the present invention is to have the ridge-like structure flow-field test slab model of following structure to solve by providing a kind of, and this ridge-like structure flow-field test slab model comprises: several parts such as head, breadboard, pole, connector are formed.
Fluid is to the impact of flat plate model in the process of the test in order to reduce, and the head front end face of flat plate model is rounded down, and the back end design wedgewise is convenient to the location.Owing to be turbulent flow drag reduction test, therefore be processed with the V-groove that is arranged in parallel that 10 left and right sides width and the degree of depth are 1mm in head front end perpendicular flow direction, as rough zone, make the breadboard surface flow field fully reach turbulent flow.
The head length of flat plate model and breadboard length ratio L1: L2=1: 15, the wedge angle of both cooperation places is 60 degree.The breadboard front end is a wedge-shaped slot, cooperates the location with head; Afterbody is designed with diversion section, makes the flow field stable.In the zone of breadboard upper surface processing ridge-like structure, ridge-like structure is to utilize precision milling machine directly to be shaped in the breadboard surface working.With the breadboard axis is the boundary, and both sides process the ridge-like structure of different size, shape respectively.So just can in single test, test two kinds of ridge-like structure surface flow fields simultaneously, reduce workload.Influence each other for reducing by two kinds of ridge-like structure surface flow fields, the interval of suitable width is set in both joints.
For reducing the clamping error between head and the breadboard, web member adopts to join to beat with screw and is connected.Carrying out using same head when different ridge-like structures are tested, only change breadboard, to improve the consistance of trystate.One end of pole is connected with external device (ED), and the other end is connected with breadboard.In stable condition in test with the warranty test plate.
The connected mode of pole and breadboard is as shown in Figure 2.Three through holes of processing on the breadboard near two apportion both sides of front end face, are tried one's best under the situation of proof strength near lateral edges, with the influence of minimizing to the ridge-like structure surface flow field, on the axis that is positioned at outside the ridge-like structure zone near rear end face.Three poles are fastenedly connected through nut and breadboard.Pole is near the partial design diamondwise cross section of breadboard upper surface, and the diamond-shaped cross-section major axis is consistent with fluid flow direction during installation, can make fluid steadily walk around pole like this, reduces the influence of a pole pair breadboard surface flow field.
Lie against in the water during this flat plate model test, eliminated the influence of gravity field; Employing separate type design has improved consistance and the accuracy of experimental study of the trystate of different models; On a breadboard, process two kinds of ridge-like structures simultaneously, significantly reduced the experiment work amount, improved work efficiency.
Description of drawings
Below in conjunction with accompanying drawing ridge-like structure flow-field test slab model of the present invention is explained further details.
Fig. 1. be ridge-like structure flow-field test slab model synoptic diagram of the present invention.
Fig. 2. be ridge-like structure flow-field test slab model vertical view of the present invention (the included zone of dotted line is the ridge-like structure zone).
Fig. 3. be in the ridge-like structure flow-field test slab model vertical view of the present invention A-A to synoptic diagram.
Fig. 4. be that d place screw connects partial enlarged drawing in the ridge-like structure flow-field test slab model vertical view of the present invention.
Fig. 5. be in the ridge-like structure flow-field test slab model vertical view of the present invention A-A to synoptic diagram in e place ridge-like structure partial enlarged drawing.
Fig. 6. be in the ridge-like structure flow-field test slab model vertical view of the present invention A-A to synoptic diagram in f place ridge-like structure partial enlarged drawing.
Embodiment
Show that like Fig. 1 ridge-like structure flow-field test slab model of the present invention comprises: head 1, breadboard 2, pole 3, nut 4, web member 5 and screw more than 6 parts are formed.
Fluid is to the impact of flat plate model in the process of the test in order to reduce, and head 1 front end face of flat plate model is rounded down, and the back end design wedgewise is convenient to the location.Owing to be turbulent flow drag reduction test, therefore be processed with the V-groove that is arranged in parallel that 10 left and right sides width and the degree of depth are 1mm in head 1 front end perpendicular flow direction, as rough zone 7, make breadboard 2 surface flow fields fully reach turbulent flow with this.
The head length of flat plate model and breadboard length ratio L1: L2=1: 15, the wedge angle of both cooperation places is 60 degree.Breadboard 2 front ends are wedge-shaped slot, cooperate the location with head; Afterbody is designed with diversion section, avoids separation flow, makes the flow field stable.In the zone of breadboard 2 upper surfaces processing ridge-like structure, ridge-like structure utilizes precision milling machine directly to be shaped in the breadboard surface working.With breadboard 2 axis is the boundary, and both sides process the ridge-like structure of different size, shape respectively, so just can in single test, test two kinds of ridge-like structure surface flow fields simultaneously, has reduced workload.Influence each other for reducing by two kinds of ridge-like structure surface flow fields, the interval of suitable width is set in both joints.
Lean on web member 5 to be connected between the head 1 of flat plate model and the breadboard 2 with screw 6.For reducing the clamping error, web member 5 all adopts to join with screw 6 and beats.When carrying out the test of different ridge-like structures, uses same head 1, only change breadboard 2, with the consistance of raising trystate.
One end of pole 3 is connected with external device (ED), and the other end is connected with breadboard 2.Its effect is that warranty test plate 2 is in stable condition in test.
Pole 3 is as shown in Figure 2 with the connected mode of breadboard 2.Three through holes of processing on the breadboard near two apportion both sides of front end face, are tried one's best under the situation of proof strength near lateral edges, with the influence of minimizing to the ridge-like structure surface flow field, on the axis that is positioned at outside the ridge-like structure zone near rear end face.Three poles are fastenedly connected through nut 4 and breadboard 2.Pole 3 is near the partial design diamondwise cross section of breadboard upper surface, and the diamond-shaped cross-section major axis is consistent with fluid flow direction during installation, can make fluid steadily walk around pole 3 like this, reduces the influence of 3 pairs of breadboard 2 surface flow fields of pole.
Like Fig. 1, shown in Figure 2, L1=40mm, L2=600mm, L3=180mm.
Flat plate model head and breadboard material are organic glass, and a bar material is No. 45 steel.
As shown in Figure 1; The assembling of ridge-like structure flow-field test slab model of the present invention: head 1 aligns through wedge-shaped slot with breadboard 2; Web member 5 places the junction, after screw 6 is screwed into head 1 and breadboard 2 through web member 5 respectively, guarantee that head 1 closely is connected with breadboard 2.
With the through hole that pole 3 is inserted on the breadboard 2, guarantee that pole 3 diamond-shaped cross-section long axis directions are consistent with breadboard 2 axial directions, with nut 4 pole 3 and breadboard 2 are connected then.
This flat plate model lies against in the water, has eliminated the influence of gravity field; Employing separate type design has improved consistance and the accuracy of experimental study of the trystate of different models; On a breadboard, process two kinds of ridge-like structures simultaneously, significantly reduced the experiment work amount, improved work efficiency.
Claims (3)
1. ridge-like structure flow-field test slab model; Comprise flat plate model head and breadboard; It is characterized in that: said flat plate model head (1) and breadboard (2) adopt separate type, between the head of flat plate model (1) and the breadboard (2) by web member (5) with screw (6) employing join and dozen be connected; Described flat plate model head (1) front end face is rounded down, the rear end wedgewise, and breadboard (2) front end is a wedge-shaped slot, cooperates the location with head, breadboard (2) afterbody has diversion section; Described breadboard (2) surface is processed with the ridge-like structure of two kinds of difformities, size with the both sides, axis, and both joints are provided with the interval of suitable width, and flat plate model adopts and lies against the modes of emplacement in the water; Pole (3) is passed the through hole on the breadboard (2); With nut (4) three poles and breadboard are fastenedly connected; Pole (3) is near the partial design diamondwise cross section of breadboard (2) upper surface; The diamond-shaped cross-section long axis direction is consistent with the breadboard axial direction, and the other end of pole (3) is connected with external device (ED).
2. ridge-like structure flow-field test slab model according to claim 1 is characterized in that: the head length of flat plate model and breadboard length ratio L1: L2=1: 15, and the wedge angle of both cooperation places is 60 degree.
3. ridge-like structure flow-field test slab model according to claim 1 is characterized in that: described flat plate model head and breadboard material are organic glass, and a bar material is No. 45 steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100215021A CN101832853B (en) | 2009-03-12 | 2009-03-12 | Ridged flow-field test slab model |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100215021A CN101832853B (en) | 2009-03-12 | 2009-03-12 | Ridged flow-field test slab model |
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| Publication Number | Publication Date |
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| CN101832853A CN101832853A (en) | 2010-09-15 |
| CN101832853B true CN101832853B (en) | 2012-03-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009100215021A Expired - Fee Related CN101832853B (en) | 2009-03-12 | 2009-03-12 | Ridged flow-field test slab model |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102478460B (en) * | 2010-11-23 | 2014-07-16 | 浙江派尼尔机电有限公司 | Test device and system of engine for boat |
| CN103512724B (en) * | 2013-10-09 | 2016-03-09 | 哈尔滨工程大学 | The test unit of assessment non-smooth surface drag-reduction effect and method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101050995A (en) * | 2007-05-18 | 2007-10-10 | 清华大学 | Detector for round cross section sample wall surface fluid friction resistance |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101050995A (en) * | 2007-05-18 | 2007-10-10 | 清华大学 | Detector for round cross section sample wall surface fluid friction resistance |
Non-Patent Citations (2)
| Title |
|---|
| 刘占一，宋保维，胡海豹，黄桥高，黄明明.脊状表面减阻特性的风洞试验研究.《实验力学》.2008,第23卷(第5期),469-474. * |
| 郭晓娟.脊状表面减阻特性及其结构优化设计研究.《西北工业大学硕士学位论文》.2007,全文. * |
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| CN101832853A (en) | 2010-09-15 |
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