CN111156866A - High-speed entry navigation body second grade head form - Google Patents
High-speed entry navigation body second grade head form Download PDFInfo
- Publication number
- CN111156866A CN111156866A CN201911377125.5A CN201911377125A CN111156866A CN 111156866 A CN111156866 A CN 111156866A CN 201911377125 A CN201911377125 A CN 201911377125A CN 111156866 A CN111156866 A CN 111156866A
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- China
- Prior art keywords
- head
- water
- stage
- projectile
- stage head
- Prior art date
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 43
- 230000007704 transition Effects 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 description 12
- 210000003934 vacuole Anatomy 0.000 description 8
- 230000009189 diving Effects 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 241000251729 Elasmobranchii Species 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B17/00—Rocket torpedoes, i.e. missiles provided with separate propulsion means for movement through air and through water
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B19/00—Marine torpedoes, e.g. launched by surface vessels or submarines; Sea mines having self-propulsion means
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T70/00—Maritime or waterways transport
- Y02T70/10—Measures concerning design or construction of watercraft hulls
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
本发明公开一种高速入水航行体二级头型，涉及水下推进装置技术领域，主要包括一级头部和二级头部，一级头部角度为60°，二级头角度为60°，一级头部和二级头部之间为圆柱过渡段，二级头部之后为圆柱状弹体。本发明中的高速入水航行体二级头型采用了两级头部，减小了头部和弹体与水接触的面积，有效的减少了弹体在水中高速运动时所受到的来自于水的摩擦力。弹体在水下高速运动时，其一级头部与水接触，产生空泡，空泡壁面会越过二级头，并包裹住弹体，极大的减小了来自头部的阻力。
The invention discloses a second-stage head type of a high-speed water-entry vehicle, which relates to the technical field of underwater propulsion devices. , between the primary head and the secondary head is a cylindrical transition section, and after the secondary head is a cylindrical projectile. The second-stage head type of the high-speed water-entry vehicle in the present invention adopts two-stage heads, which reduces the contact area between the head and the projectile body and water, and effectively reduces the impact of the projectile body from water when it moves at high speed in water. friction force. When the projectile moves at high speed underwater, its first-stage head is in contact with water, resulting in cavitation. The wall of the cavitation will pass over the second-stage head and wrap the projectile, which greatly reduces the resistance from the head.
Description
Technical Field
The invention relates to the technical field of underwater propelling devices, in particular to a high-speed underwater vehicle two-stage head type.
Background
Whether the rapid delivery of the supercavity projectile or the marine communication equipment is carried out, the test of the water entering process is carried out, the projectile or the delivery vehicle is guaranteed not to be damaged in the water entering process, the striking task or the communication task can be smoothly completed, and people are forced to continuously increase the knowledge of the water entering process of a navigation body. The water inlet process starts from the moment that the head of the moving body touches the free water surface, a disturbance which enables the water area to flow is generated in the water area near the touch point, the disturbance is rapidly spread to the periphery in the water area, and the moving body enters the water area to reach a stable state along with the time to complete the water inlet process. The water inlet process is a very short transient process, but the short process plays an extremely important role in the whole motion process of the moving body, and determines whether the moving body can stably enter water from air or not to a great extent. For example, in 1930, the MK31 aerial-casting torpedo is successfully manufactured in the United states, more than half of torpedoes are found in subsequent actual combat, and problems such as diving or ballistic instability after diving occur, and analysis shows that: the reason is that the influence of the generation of water-entering vacuoles on the hydrodynamics in the water-entering process is not clear enough. The water inlet process is subjected to complex phenomena of sudden change of a flowing medium, free liquid level and the like in a very short time, and simultaneously the interaction of a moving body, air and water is involved. The navigation body can form vacuole when entering water, the vacuole wraps the navigation body, so that partial area of the navigation body can be prevented from being in direct contact with water, and the head of the navigation body is reasonably designed to reduce the resistance received by the navigation body when entering water.
Disclosure of Invention
In order to solve the technical problems, the invention provides a two-stage head shape of a high-speed water inlet navigation body, which is applied to the head shape of the high-speed water inlet navigation body.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a high-speed water-entering navigation body secondary head type, which comprises a primary head and a secondary head, wherein the primary head is arranged at the top of the secondary head.
Optionally, the primary header comprises a primary header vertex angle.
Optionally, the vertex angle of the primary head is a cone, and the vertex angle of the cone is 60 °.
Optionally, a transition section is arranged between the first-stage head and the second-stage head.
Optionally, the transition section is cylindrical.
Optionally, the diameter of the transition section is the same as the diameter of the base of the cone.
Optionally, the secondary head is in a shape of a circular truncated cone, and an included angle of a side extension line of the circular truncated cone is 60 °.
Optionally, an elastic body is arranged at one end of the secondary head part different from the primary head part.
Optionally, the projectile body is cylindrical.
Compared with the prior art, the invention has the following technical effects:
the second-stage head type of the high-speed water-entering navigation body mainly comprises a first-stage head and a second-stage head, wherein the angle of the first-stage head is 60 degrees, the angle of the second-stage head is 60 degrees, a cylindrical transition section is arranged between the first-stage head and the second-stage head, and a cylindrical projectile body is arranged behind the second-stage head. The two-stage head type of the high-speed water entering navigation body adopts the two-stage head, so that the contact area of the head and the projectile body with water is reduced, and the friction force from the water when the projectile body moves at high speed in the water is effectively reduced. When the projectile body moves at a high speed underwater, the primary head of the projectile body is contacted with water to generate vacuoles, the wall surface of each vacuole can cross the secondary head and wrap the projectile body, and the resistance from the head is greatly reduced.
Drawings
FIG. 1 is a schematic structural diagram of a two-stage head of a high-speed water-entering navigation body according to the present invention.
Description of reference numerals: 1. a first-level head vertex angle; 2. a primary head; 3. a transition section; 4. a secondary head; 5. a body of elastomer; 6. carrying out cavitation; 7. and (3) water.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
as shown in fig. 1, the embodiment provides a second-level head type of a high-speed water-entering navigation body, which comprises a first-level head 2, a transition section 3, a second-level head 4 and a projectile body 5 which are arranged in sequence from front to back,
in this embodiment, the primary head 2 comprises a conical primary head apex angle 1, the cone apex angle being 60 °. The transition section 3 is cylindrical. The diameter of the transition section 3 is the same as the diameter of the base of the cone. The secondary head part 4 is in a circular truncated cone shape, and the included angle of the extended lines of the side edges of the circular truncated cone shape is 60 degrees. The projectile body 5 is cylindrical.
The first-level head 2 of the navigation body collides with the water 7, and the pointed-nail-shaped spray moves backwards relative to the navigation body along the wall surface of the first-level head 2; the water 7 flows through the primary head 2 of the navigation body, and a cavity 6 is formed between the tail end of the primary head 2 and the cylindrical surface of the transition section 3 behind the primary head; the underwater penetration depth of the navigation body is increased continuously, splashed water splash slightly collides with the secondary head 4 of the navigation body, but the whole body exceeds the secondary head 4, and the water splash continuously moves backwards relative to the navigation body; the underwater penetration depth of the navigation body is further deepened, the area of the vacuole 6 formed behind the first-level head 2 gradually wraps the projectile body 5 behind the second-level head 4 of the navigation body, and the second-level head 4 and the projectile body 5 of the navigation body do not directly interact with water 7, so that the contact area between the head and the projectile body 5 and the water 7 is reduced, and the friction force from the water 7 when the projectile body 5 moves at high speed in the water 7 is effectively reduced.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
In summary, the following steps: the invention discloses a high-speed underwater vehicle secondary head type, which relates to the technical field of underwater propulsion devices and mainly comprises a primary head and a secondary head, wherein the angle of the primary head is 60 degrees, the angle of the secondary head is 60 degrees, a cylindrical transition section is arranged between the primary head and the secondary head, and a cylindrical projectile body is arranged behind the secondary head. The two-stage head type of the high-speed water entering navigation body adopts the two-stage head, so that the contact area of the head and the projectile body with water is reduced, and the friction force from the water when the projectile body moves at high speed in the water is effectively reduced. When the projectile body moves at a high speed underwater, the primary head of the projectile body is contacted with water to generate vacuoles, the wall surface of each vacuole can cross the secondary head and wrap the projectile body, and the resistance from the head is greatly reduced.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911377125.5A CN111156866B (en) | 2019-12-27 | 2019-12-27 | High-speed entry navigation body second grade head form |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911377125.5A CN111156866B (en) | 2019-12-27 | 2019-12-27 | High-speed entry navigation body second grade head form |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111156866A true CN111156866A (en) | 2020-05-15 |
| CN111156866B CN111156866B (en) | 2022-12-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911377125.5A Active CN111156866B (en) | 2019-12-27 | 2019-12-27 | High-speed entry navigation body second grade head form |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114295016A (en) * | 2022-01-05 | 2022-04-08 | 中国人民解放军国防科技大学 | Configuration of underwater supercavitation vehicle based on the combination of multi-stage cavitation and wake entrainment |
| CN115096148A (en) * | 2022-06-28 | 2022-09-23 | 中国人民解放军军事科学院国防工程研究院 | Multipurpose assembled type underwater projectile body test model and use method thereof |
| CN115265289A (en) * | 2022-05-16 | 2022-11-01 | 东北大学 | Bullet with small critical incident angle |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090173248A1 (en) * | 2007-12-03 | 2009-07-09 | Lockheed Martin Corporation | Supercavitating Projectile and Operation Thereof |
| CN101776697A (en) * | 2010-01-26 | 2010-07-14 | 哈尔滨工程大学 | Test device used in underwater high-speed moving object |
| CN104590481A (en) * | 2014-12-11 | 2015-05-06 | 中国航天空气动力技术研究院 | Combined type cavitator |
| CN107543462A (en) * | 2017-08-14 | 2018-01-05 | 江苏大学 | A kind of supercavitating vehicle |
| 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 |
-
2019
- 2019-12-27 CN CN201911377125.5A patent/CN111156866B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090173248A1 (en) * | 2007-12-03 | 2009-07-09 | Lockheed Martin Corporation | Supercavitating Projectile and Operation Thereof |
| CN101776697A (en) * | 2010-01-26 | 2010-07-14 | 哈尔滨工程大学 | Test device used in underwater high-speed moving object |
| CN104590481A (en) * | 2014-12-11 | 2015-05-06 | 中国航天空气动力技术研究院 | Combined type cavitator |
| CN107543462A (en) * | 2017-08-14 | 2018-01-05 | 江苏大学 | A kind of supercavitating vehicle |
| 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 |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114295016A (en) * | 2022-01-05 | 2022-04-08 | 中国人民解放军国防科技大学 | Configuration of underwater supercavitation vehicle based on the combination of multi-stage cavitation and wake entrainment |
| CN114295016B (en) * | 2022-01-05 | 2024-04-05 | 中国人民解放军国防科技大学 | Underwater supercavitation navigation body configuration based on combination of multistage cavitation and wake entrainment |
| CN115265289A (en) * | 2022-05-16 | 2022-11-01 | 东北大学 | Bullet with small critical incident angle |
| CN115265289B (en) * | 2022-05-16 | 2023-08-29 | 东北大学 | A Bullet with Small Critical Incident Angle |
| CN115096148A (en) * | 2022-06-28 | 2022-09-23 | 中国人民解放军军事科学院国防工程研究院 | Multipurpose assembled type underwater projectile body test model and use method thereof |
| CN115096148B (en) * | 2022-06-28 | 2024-05-24 | 中国人民解放军军事科学院国防工程研究院 | Multipurpose assembled water-entering elastomer test model and application method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111156866B (en) | 2022-12-13 |
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