CN108180792A - Supercavitating Projectile about granule surface contral drag reduction - Google Patents
Supercavitating Projectile about granule surface contral drag reduction Download PDFInfo
- Publication number
- CN108180792A CN108180792A CN201711482441.XA CN201711482441A CN108180792A CN 108180792 A CN108180792 A CN 108180792A CN 201711482441 A CN201711482441 A CN 201711482441A CN 108180792 A CN108180792 A CN 108180792A
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- China
- Prior art keywords
- projectile
- buffer
- driver
- controller
- sensor
- Prior art date
- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B10/00—Means for influencing, e.g. improving, the aerodynamic properties of projectiles or missiles; Arrangements on projectiles or missiles for stabilising, steering, range-reducing, range-increasing or fall-retarding
- F42B10/32—Range-reducing or range-increasing arrangements; Fall-retarding means
- F42B10/38—Range-increasing arrangements
Abstract
The invention discloses a kind of Supercavitating Projectile about granule surface contral drag reduction, including projectile body, buffer, strut, cavitation device, sensor, controller and driver；The sensor for sensing projectile velocity is mounted on the middle part front end of projectile body；Controller is mounted on the inside of projectile body, receives the information from sensor and emits control instruction；Driver is mounted on the rear end of projectile body, the telescopic location of the order adjustment buffer of response controller；Four buffers are evenly distributed on the driver of projectile body tail end.The supercavity underwater projectile that the present invention designs can keep stablizing in air cavity, and simple in structure, easy to implement, intelligent Application range is more extensive.
Description
Technical field
The present invention relates to underwater projectile field, specifically a kind of Supercavitating Projectile about granule surface contral drag reduction, improvement is penetrated
It plays surface texture and realizes drag reduction purpose.
Background technology
When underwater sailing body high-speed mobile, blown-out shot phenomenon can be generated under certain condition.Blown-out shot phenomenon typically refers to
The low-pressure area in the flow field of liquid, when liquid flowing pressure reaches the saturated vapour pressure of liquid, gasification can occur for liquid so as to shape
Into " vacuole ".Generally, for the underwater sailing body of flow field package, when the cavity length of generation is less than the navigation body length
Referred to as partial cavity；And the referred to as supercavity when the cavity length of generation meets or exceeds the length of the sail body." vacuole " makes
It obtains and is actually moved in air chamber on projectile, so as to greatly reduce the resistance contacted with water.
The front end of supercavity underwater projectile can install one " cavitation device ", when Supercavitating Projectile high-speed mobile under water,
Cavitation device is contacted with water generates many small air bubbles, these small air bubbles are combined into a big bubble, can wrap up whole
A projectile.
As shown in Figure 1, the component for the Supercavitating Projectile developed at present includes projectile body, tail fin, wherein cavitation device, tail fin
It is prismatic, four tail fins are mounted in the tail end of projectile at equal intervals.The effect of tail fin is to ensure that projectile body is completely encapsulated in
In air chamber, this dramatically reduces contact of the projectile with water, improve the underwater movement speed of projectile.
Chinese patent 2-060875865.1 discloses a kind of aircraft tail portion bleed damping device, and feature includes gas collection
Ring and protection against erosion skirt, collector ring are communicated by multiple bleed holes with engine jet pipe, and the combustion gas of engine jet pipe is introduced gas collection
There are multiple gas vents in ring, collector ring outside, discharge the combustion gas of collector ring.Protection against erosion skirt is fixed in aircraft tail portion, along navigation
Device is axially extended in the middle part of engine jet pipe.After aircraft propulsion system starts, engine ignition generates combustion gas, and Some gases lead to
It crosses bleed hole and enters collector ring, cooling is expanded in collector ring, then spray via gas vent, the combustion gas of ejection is connect by protection against erosion skirt
It receives, and assembles to form bubble in engine bottom, so as to fulfill the purpose of drag reduction.This mode is on the basis of traditional sail body
Increase two components, increase the energy loss of engine, and when sail body is run at high speed to the utilization rate of combustion gas not
Controllably, narrow application range.
Chinese patent 2-0610958648.9 disclose it is a kind of applied to sail body autonomous stabilisation navigation control device and
By tail portion axial direction notch setting annular in shape on the outer of sail body tail portion bottom end, smaller flow is formed by jet flow for method
Circumferentially closed axial jet flow, the ejector action of the axial jet flow of formation can shrink the periodicity generated to supercavity tail portion
It comes off and is broken, ride up to stabilization, prevent the oscillation of supercavity tail portion, reduce the leakage of supercavity rear gas, be conducive to subtract
Air-loss during few sail body high speed operation.This mode requires the detection of tail portion bubble sensor excessively high, realization difficulty
Greatly, application range is narrow.
Invention content
The purpose of the present invention is to provide a kind of Supercavitating Projectiles about granule surface contral drag reduction.
Realize the object of the invention technical solution be：A kind of Supercavitating Projectile about granule surface contral drag reduction, including
Projectile body, buffer, strut, cavitation device, sensor, controller and driver；
The sensor for sensing projectile velocity is mounted on the middle part front end of projectile body；Controller is mounted on the inside of projectile body,
Receive the information from sensor and emit control instruction；Driver is mounted on the rear end of projectile body, the life of response controller
Enable the telescopic location of adjustment buffer；Four buffers are evenly distributed on the driver of projectile body tail end.
The cavitation device is located at the front end of projectile body.
The buffer is connected respectively by strut with driver.
The buffer curved slab consistent for shape.
Compared with prior art, the present invention its remarkable advantage：（1）The present invention is in shape design, the buffering for template of skiing
Device will not break through Gas water boundary and generate water resistance, meet the mechanism of surface drag reduction.（2）The present invention by sensor and controller come
Adjust the positioning of buffer so that projectile can realize best drag-reduction effect under different headways.（3）The knot that the present invention designs
Structure is simple, easy to implement, and intelligent Application range is more extensive.
Description of the drawings
Fig. 1 is the side view of common Supercavitating Projectile 1 in air cavity.
Fig. 2 is respectively the left view and front view of supercavitation projectile 2 that the present invention designs.
Fig. 3 is respectively supercavity projectile 2 relative to the left view of paraboloid 3-1 and frustum 3-2 and faces
Figure.
Fig. 4 is sectional view of the projectile along Fig. 2 center lines A-A.
Fig. 5 is the longitudinal axis 501 and perpendicularly to the longitudinal axis 501 line 502 of supercavity projectile 2.
Specific embodiment
（1）The projectile body of air chamber is formed in water, and plenum chamber model is determined by Gas water boundary；
（2）The skiing template buffer being connect with projectile, ski template buffer bottom towards air cavity Gas water boundary；
（3）Speed and plenum chamber model based on projectile change the driver and controller of buffer positions.
A shortcoming of Supercavitating Projectile for prior art design is exactly：Tail fin is easily accessible to Gas water boundary, increases
The water resistance of projectile movement.Another disadvantage is that：Since the position of tail fin is fixed, it is impossible to adapt to be drawn by projectile velocity variation
The variation of the cavity shape risen.
The supercavity underwater projectile that the present invention designs can keep stablizing in air cavity, and disadvantages mentioned above may be not present.This hair
The tail fin of bright design is buffer structure of the shape similar to skis, towards the Gas water boundary of air cavity.When projectile tail end and sky
When gas-water interface contacts, water will generate torque and screen resilience, and projectile is back into air chamber.In addition, the because shape of buffer
Shape is as skis, so buffer will not penetrate the water surface and generate unnecessary water resistance.
The invention will be further described by 1-5 with reference to the accompanying drawings of the specification.
Supercavity projectile 2 includes：Projectile body 2-0, buffer 2-1 to 2-4, strut 2-5 to 2-8, cavitation device 204,
Sensor 4-1, controller 4-2 and driver 4-3.
Buffer 2-i { 1,2,3,4 } be to maintain projectile body 2-0 stablize in air cavity 205, and make projectile relative to
The skiing slab structure that the yaw of its track minimizes.The purpose of buffer 2-i is to contact air cavity 205 in projectile body 2-0 tail ends
Gas water boundary when generate torque and screen resilience.
The frustum 3-2 of the outer surface composition paraboloid 3-1 of buffer 2-1 to 2-4, as shown in figs.3 a and 3b,
Frustum 3-2 is designed to the shape of fitting air cavity 205, and the vertex of paraboloid 3-1 is overlapped with cavitation device 204.With showing
The high-drag surface for having buffer in technology is compared, and the parabolic shape of buffer 2-i is intended to across 204 Gas water boundary of air chamber
Resistance.As shown in figure 5, the shape of buffer 202-i and orientation are so that buffer 202-i lateral surfaces areas（It is parallel to axis
Line 501）It is far longer than and compares vertical surface area.
Strut 2- { 5,6,7,8 } is rigid member, its effect is that buffer 2-i is connected to the drive of projectile body 2-0
On dynamic device 4-3.
Cavitation device 204 is contacted in the front end of projectile body 2-0 with water, generates many minute bubbles.Then minute bubbles are agglomerated into
One sufficiently large complete air chamber for surrounding supercavitation projectile 2.
Sensor 4-1 is for detecting the speed of supercavitation projectile 2 moved under water and speed index being sent to control
Device 4-2 processed.
Shapes of the controller 4-2 based on the tachometric survey estimation air cavity 205 from sensor 4-1, then controls driver
4-3 changes buffer 2-i { 1,2,3,4 } position, so as to which buffer be made correctly to be bonded Gas water boundary.For example, as controller 4-2
Determine air cavity 205 just during expansion, controller 4-2 instruction driver 4-3 freeing buffer, but when controller 4-2 is determined
When air cavity 205 is being shunk, controller 4-2 instruction driver 4-3 retraction buffers.
Driver 4-3 is the mechanism of the flexible buffer 2-i { 1,2,3,4 } under the instruction of controller 4-2.
Claims (4)
1. a kind of Supercavitating Projectile about granule surface contral drag reduction, it is characterised in that：Including projectile body（2-0）, buffer（2-
1,2-2,2-3,2-4）, strut（2-5,2-6,2-7,2-8）, cavitation device（204）, sensor（4-1）, controller（4-2）And drive
Dynamic device（4-3）；
Sense the sensor of projectile velocity（4-1）Mounted on projectile body（2-0）Middle part front end；Controller 4-2 is mounted on and penetrates
Play main body（2-0）Inside, receive from sensor（4-1）Information and emit control instruction；Driver（4-3）Mounted on penetrating
Play main body（2-0）Rear end, response controller（4-2）Order adjustment buffer（2-1）Telescopic location；Four buffers
（2-1,2-2,2-3,2-4）It is evenly distributed in projectile body（2-0）The driver of tail end（4-3）On.
2. Supercavitating Projectile as described in claim 1, it is characterised in that：The cavitation device（204）Positioned at projectile body（2-0）
Front end.
3. Supercavitating Projectile as described in claim 1, it is characterised in that：The buffer（2-1,2-2,2-3,2-4）Respectively
Pass through strut（2-5,2-6,2-7,2-8）With driver（4-3）It is connected.
4. Supercavitating Projectile as described in claim 1, it is characterised in that：The buffer（2-1,2-2,2-3,2-4）For shape
The consistent curved slab of shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711482441.XA CN108180792A (en) | 2017-12-29 | 2017-12-29 | Supercavitating Projectile about granule surface contral drag reduction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711482441.XA CN108180792A (en) | 2017-12-29 | 2017-12-29 | Supercavitating Projectile about granule surface contral drag reduction |
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| Publication Number | Publication Date |
|---|---|
| CN108180792A true CN108180792A (en) | 2018-06-19 |
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ID=62549201
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711482441.XA Pending CN108180792A (en) | 2017-12-29 | 2017-12-29 | Supercavitating Projectile about granule surface contral drag reduction |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110126975A (en) * | 2019-05-15 | 2019-08-16 | 南京理工大学 | A method of forming ventilated supercavitation |
| CN110360897A (en) * | 2019-06-28 | 2019-10-22 | 南京理工大学 | A kind of stable Supercavitating Projectile enters water-bound |
| CN110375594A (en) * | 2019-06-28 | 2019-10-25 | 南京理工大学 | A kind of supercavity long-tail projectile entering water suitable for low-angle |
| CN113124718A (en) * | 2021-04-21 | 2021-07-16 | 东北大学 | Supercavitation bullet |
| CN114858007A (en) * | 2022-04-28 | 2022-08-05 | 天津中德应用技术大学 | Underwater projectile configuration design |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8151711B1 (en) * | 2009-03-07 | 2012-04-10 | Lockheed Martin Corporation | Supercavitating projectile with reduced-drag control surfaces |
-
2017
- 2017-12-29 CN CN201711482441.XA patent/CN108180792A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8151711B1 (en) * | 2009-03-07 | 2012-04-10 | Lockheed Martin Corporation | Supercavitating projectile with reduced-drag control surfaces |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110126975A (en) * | 2019-05-15 | 2019-08-16 | 南京理工大学 | A method of forming ventilated supercavitation |
| CN110360897A (en) * | 2019-06-28 | 2019-10-22 | 南京理工大学 | A kind of stable Supercavitating Projectile enters water-bound |
| CN110375594A (en) * | 2019-06-28 | 2019-10-25 | 南京理工大学 | A kind of supercavity long-tail projectile entering water suitable for low-angle |
| CN113124718A (en) * | 2021-04-21 | 2021-07-16 | 东北大学 | Supercavitation bullet |
| CN114858007A (en) * | 2022-04-28 | 2022-08-05 | 天津中德应用技术大学 | Underwater projectile configuration design |
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Application publication date: 20180619 |