CN203567941U - Novel rib used for parafoil - Google Patents
Novel rib used for parafoil Download PDFInfo
- Publication number
- CN203567941U CN203567941U CN201320784127.8U CN201320784127U CN203567941U CN 203567941 U CN203567941 U CN 203567941U CN 201320784127 U CN201320784127 U CN 201320784127U CN 203567941 U CN203567941 U CN 203567941U
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- CN
- China
- Prior art keywords
- rib
- point
- top airfoil
- aerofoil
- parafoil
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- IBSREHMXUMOFBB-JFUDTMANSA-N 5u8924t11h Chemical compound O1[C@@H](C)[C@H](O)[C@@H](OC)C[C@@H]1O[C@@H]1[C@@H](OC)C[C@H](O[C@@H]2C(=C/C[C@@H]3C[C@@H](C[C@@]4(O3)C=C[C@H](C)[C@@H](C(C)C)O4)OC(=O)[C@@H]3C=C(C)[C@@H](O)[C@H]4OC\C([C@@]34O)=C/C=C/[C@@H]2C)/C)O[C@H]1C.C1=C[C@H](C)[C@@H]([C@@H](C)CC)O[C@]11O[C@H](C\C=C(C)\[C@@H](O[C@@H]2O[C@@H](C)[C@H](O[C@@H]3O[C@@H](C)[C@H](O)[C@@H](OC)C3)[C@@H](OC)C2)[C@@H](C)\C=C\C=C/2[C@]3([C@H](C(=O)O4)C=C(C)[C@@H](O)[C@H]3OC\2)O)C[C@H]4C1 IBSREHMXUMOFBB-JFUDTMANSA-N 0.000 title claims abstract description 28
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
Images
Abstract
The utility model discloses a novel rib used for a parafoil. The novel rib comprises an upper aerofoil of the rib and a lower aerofoil of the rib, wherein a leading-edge cut is formed by the foremost point of the upper aerofoil of the rib and the foremost point of the lower aerofoil of the rib, the final point of the upper aerofoil of the rib is connected to the final point of the lower aerofoil of the rib, the upper aerofoil of the rib is connected by multiple points in a smooth manner so as to be arc-shaped, the lower aerofoil of the rib is connected by two points so as to be linear, the proportion of a horizontal distance between the point, which corresponds to a maximum longitudinal distance between the upper aerofoil of the rib and the lower aerofoil of the rib, of the upper aerofoil of the rib and the final point of the upper aerofoil of the rib, in a total horizontal distance between the foremost point and the final point of the upper aerofoil of the rib is 0.78 to 0.82. An inclined angle formed between the leading-edge cut and the level is 28 degrees to 32 degrees. The proportion of the height of the leading-edge cut in the chord length of the upper aerofoil of the rib is 5% to 7%. The novel rib has the beneficial effects that through selecting appropriate airfoil coordinates, the novel rib with the better aerodynamic performance and the better operating performance is provided for providing the better lift-drag ratio and the better control ability for an air-drop parafoil.
Description
Technical field
The utility model relates to parafoil field, is specifically related to a kind of novel rib for parafoil.
Background technology
Parafoil is a kind of novel parachute, it has changed traditional parachute and has utilized air resistance to slow down the feature that object declines aloft, it has used traditional parachute flexible fabric, but launch the rigidity aerodynamic force face that ram air becomes similar wing afterwards, have the advantages that to produce lift gliding flight aloft.Rib is the basic element of character of parafoil moulding, is also that parafoil can be as manipulation as fixed-wing and the key of circling in the air.The shape of rib, directly related with parafoil performance.The aeroperformance of existing rib, maneuvering performance are not enough to guarantee that the glide ability of air-drop parafoil meets its user demand.
Summary of the invention
The technical problems to be solved in the utility model is, for the rib above shortcomings of existing parafoil, to provide a kind of novel rib for parafoil with better aeroperformance, glide ability and road-holding property.
The utility model is to solve the problems of the technologies described above adopted technical scheme to be:
A kind of novel rib for parafoil, comprise rib top airfoil, rib lower aerofoil, the First Point of the First Point of described rib top airfoil and rib lower aerofoil forms a leading edge otch, the rearmost point of rib top airfoil is connected with the rearmost point of rib lower aerofoil, described rib top airfoil is smoothly connected camber shape by multiple spot, described rib lower aerofoil connects into linearity by 2, between rib top airfoil and rib lower aerofoil, to locate the ratio that horizontal throw between the point of corresponding rib top airfoil and the rearmost point of rib top airfoil accounts for aggregate level distance between the First Point of rib top airfoil and rearmost point be 0.78～0.82 to maximum longitudinal pitch (maximum ga(u)ge).
Press such scheme, described leading edge otch and level are 28～32 ° to the angle angle forming.
Press such scheme, the ratio that the height of described leading edge otch accounts for rib top airfoil chord length (spacing between rib top airfoil First Point and rearmost point) is 5%～7%.
Press such scheme, described rib top airfoil is smoothly connected camber shape by 39 points, if between the First Point of described rib top airfoil and rearmost point, aggregate level distance is unit length 1(dimensionless), x is to being that the point of rib top airfoil is apart from the horizontal throw between the rearmost point of rib top airfoil, y is to being that point on rib top airfoil is apart from the longitudinal pitch of rib lower aerofoil 2, if the rearmost point coordinate of the rearmost point of rib top airfoil and rib lower aerofoil is coordinate origin (0,0), on rib top airfoil, the coordinate of 39 points is as shown in table 1:
The coordinate of table 1 rib top airfoil 1 each point
| Sequence number | x | y |
| 1(First Point) | -1 | 0.058049 |
| 2 | -0.98476 | 0.088525 |
| 3 | -0.96662 | 0.107028 |
| 4 | -0.94848 | 0.12154 |
| 5 | -0.93034 | 0.132425 |
| 6 | -0.9122 | 0.139318 |
| 7 | -0.89406 | 0.145123 |
| 8 | -0.87592 | 0.149477 |
| 9 | -0.85778 | 0.153105 |
| 10 | -0.83964 | 0.155281 |
| 11 | -0.8215 | 0.157095 |
| 12 | -0.80336 | 0.158184 |
| 13 | -0.78522 | 0.157821 |
| 14 | -0.76708 | 0.15637 |
| 15 | -0.74894 | 0.154193 |
| 16 | -0.7308 | 0.152379 |
| 17 | -0.71266 | 0.150202 |
| 18 | -0.69452 | 0.1473 |
| 19 | -0.67638 | 0.14476 |
| 20 | -0.65824 | 0.14222 |
| 21 | -0.6401 | 0.138955 |
| 22 | -0.60381 | 0.132425 |
| 23 | -0.56753 | 0.125531 |
| 24 | -0.53125 | 0.117549 |
| 25 | -0.49497 | 0.109568 |
| 26 | -0.45869 | 0.101586 |
| 27 | -0.42241 | 0.093604 |
| 28 | -0.38613 | 0.08526 |
| 29 | -0.34985 | 0.077278 |
| 30 | -0.31357 | 0.069296 |
| 31 | -0.27729 | 0.061314 |
| 32 | -0.24101 | 0.053333 |
| 33 | -0.20473 | 0.045351 |
| 34 | -0.16845 | 0.037006 |
| 35 | -0.13217 | 0.029025 |
| 36 | -0.09588 | 0.021043 |
| 37 | -0.0596 | 0.013061 |
| 38 | -0.02339 | 0.005079 |
| 39(rearmost point) | 0 | 0 |
The coordinate of the First Point of described rib lower aerofoil 2 be (?0.9122,0).
Principle of work of the present utility model: rib maximum ga(u)ge can make parafoil have good stability in flight course at approximately 20% place, during 30 ° of left and right of leading edge cut angle, the leading edge cut height ratio 6% that accounts for chord length can guarantee that parafoil has good intake efficiency.
The utlity model has following beneficial effect: by suitable aerofoil profile coordinate, choose, all reasonable novel ribs of a kind of aeroperformance, maneuvering performance are provided, for air-drop parafoil provides good 1ift-drag ratio and road-holding property, rib maximum lift-drag ratio can reach 6.Thereby for the development and improvement of parafoil plays certain impetus, be particularly useful for throwing thing parafoil and use, also can be used for the fields such as propeller-parachuting.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model rib;
Fig. 2 is the utility model rib aerodynamic performance schematic diagram;
In Fig. 1,1. rib top airfoil, 2. rib lower aerofoil, 3. leading edge otch;
In Fig. 2, CL: lift coefficient, Cd: drag coefficient, L/D: 1ift-drag ratio.
The specific embodiment
Below in conjunction with drawings and Examples, the utility model is elaborated.
Shown in Fig. 1, novel rib for parafoil described in the utility model, comprise rib top airfoil 1, rib lower aerofoil 2, the First Point of the First Point of described rib top airfoil 1 and rib lower aerofoil 2 forms a leading edge otch 3, the rearmost point of rib top airfoil 1 is connected with the rearmost point of rib lower aerofoil 2, described rib top airfoil 1 is smoothly connected camber shape by multiple spot, described rib lower aerofoil 2 connects into linearity by 2, between rib top airfoil 1 and rib lower aerofoil 2, to locate the ratio that horizontal throw between the point of corresponding rib top airfoil 1 and the rearmost point of rib top airfoil 1 accounts for aggregate level distance between the First Point of rib top airfoil 1 and rearmost point be 0.8 to maximum longitudinal pitch (maximum ga(u)ge).
Described leading edge otch 3 is 30 ° with level to the angle angle forming.
The ratio that the height of described leading edge otch 3 accounts for rib top airfoil 1 chord length (spacing between rib top airfoil 1 First Point and rearmost point) is 6%.
Described rib top airfoil 1 is smoothly connected camber shape by 39 points, if between the First Point of described rib top airfoil 1 and rearmost point, aggregate level distance is unit length 1(dimensionless), x is to being that the point of rib top airfoil 1 is apart from the horizontal throw between the rearmost point of rib top airfoil 1, y is to being that point on rib top airfoil 1 is apart from the longitudinal pitch of rib lower aerofoil 2, if the rearmost point of rib top airfoil 1, and the rearmost point coordinate of rib lower aerofoil 2 is coordinate origin (0, 0), on rib top airfoil 1, the coordinate of 39 points is as shown in table 1, the coordinate of the First Point of described rib lower aerofoil 2 be (?0.9122, 0).
With reference to the rib aerodynamic performance figure shown in Fig. 2, can obtain the ratio of lift coefficient CL, drag coefficient Cd, 1ift-drag ratio L/D(lift coefficient CL and drag coefficient Cd) curve, lift coefficient CL is the bigger the better, assurance speed is very little can take off; Drag coefficient Cd is the smaller the better, guarantees that the resistance of parafoil gliding flight is less, improves parafoil maneuvering ability.Rib maximum lift-drag ratio L/D can reach 6 as can be seen from Figure 2, than similar rib performance, has better raising (similar independent rib maximum lift-drag ratio is generally in 5 left and right).
The utility model rib maximum ga(u)ge can make parafoil in flight course, have good stability at approximately 20% place, during 30 ° of left and right of leading edge cut angle, the leading edge cut height ratio 6% that accounts for chord length can guarantee that parafoil has good intake efficiency.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.
Claims (4)
1. the novel rib for parafoil, it is characterized in that: comprise rib top airfoil (1), rib lower aerofoil (2), the First Point of the First Point of described rib top airfoil (1) and rib lower aerofoil (2) forms a leading edge otch (3), the rearmost point of rib top airfoil (1) is connected with the rearmost point of rib lower aerofoil (2), described rib top airfoil (1) is smoothly connected camber shape by multiple spot, described rib lower aerofoil (2) connects into linearity by 2, between the First Point that between rib top airfoil (1) and rib lower aerofoil (2), the point of rib top airfoil (1) corresponding to maximum longitudinal pitch place and the horizontal throw between the rearmost point of rib top airfoil (1) account for rib top airfoil (1) and rearmost point, the ratio of aggregate level distance is 0.78～0.82.
2. the novel rib for parafoil as claimed in claim 1, is characterized in that: described leading edge otch (3) is 28～32 ° with level to the angle angle forming.
3. the novel rib for parafoil as claimed in claim 1, is characterized in that: the ratio that the height of described leading edge otch (3) accounts for rib top airfoil (1) chord length is 5%～7%.
4. the novel rib for parafoil as claimed in claim 1, it is characterized in that: described rib top airfoil (1) is smoothly connected camber shape by 39 points, if aggregate level distance is unit length 1 between the First Point of described rib top airfoil (1) and rearmost point, x is to being that the point of rib top airfoil (1) is apart from the horizontal throw between the rearmost point of rib top airfoil (1), y is to being that point on rib top airfoil (1) is apart from the longitudinal pitch of rib lower aerofoil (2), if the rearmost point of rib top airfoil (1), and the rearmost point coordinate of rib lower aerofoil (2) is coordinate origin (0, 0), the coordinate of upper 39 points of rib top airfoil (1) is as shown in table 1:
The coordinate of each point of table 1 rib top airfoil
The coordinate of the First Point of described rib lower aerofoil (2) is (0.9122,0).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320784127.8U CN203567941U (en) | 2013-11-29 | 2013-11-29 | Novel rib used for parafoil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320784127.8U CN203567941U (en) | 2013-11-29 | 2013-11-29 | Novel rib used for parafoil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203567941U true CN203567941U (en) | 2014-04-30 |
Family
ID=50535686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320784127.8U Expired - Lifetime CN203567941U (en) | 2013-11-29 | 2013-11-29 | Novel rib used for parafoil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203567941U (en) |
-
2013
- 2013-11-29 CN CN201320784127.8U patent/CN203567941U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140430 |
|
| CX01 | Expiry of patent term |