CN112727860A - Structure for high-Mach-number molded surface spray pipe water-cooling throat of hypersonic wind tunnel - Google Patents
Structure for high-Mach-number molded surface spray pipe water-cooling throat of hypersonic wind tunnel Download PDFInfo
- Publication number
- CN112727860A CN112727860A CN202011522853.3A CN202011522853A CN112727860A CN 112727860 A CN112727860 A CN 112727860A CN 202011522853 A CN202011522853 A CN 202011522853A CN 112727860 A CN112727860 A CN 112727860A
- Authority
- CN
- China
- Prior art keywords
- shell
- throat
- water
- water channel
- filler block
- 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.)
- Granted
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15D—FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
- F15D1/00—Influencing flow of fluids
- F15D1/08—Influencing flow of fluids of jets leaving an orifice
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/02—Wind tunnels
- G01M9/04—Details
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Nozzles (AREA)
Abstract
The invention discloses a structure of a high-Mach-number molded surface spray pipe water-cooling throat channel for a hypersonic wind tunnel, which comprises a first water channel filler block and a second water channel filler block; the first water channel filler block and the second water channel filler block are arranged on the outer side of the throat inner shell and are fixed on the throat inner shell through filler block connecting screws; the first shell and the second shell are combined to form a high-Mach-number nozzle water-cooling throat section; the throat inner shell is an axisymmetric funnel-shaped metal cylinder, a water channel and a water channel separation rib are arranged outside the throat inner shell, and bosses for sealing are respectively arranged on the outer side surfaces of the cylindrical platforms at the two ends of the throat inner shell. The throat section of the structure adopts a full-assembly structure, has no welding procedure, and eliminates the influence of welding residual stress on deformation of the throat section in the using process; the throat inner shell can be replaced, the maintenance cost after damage in the using process is reduced, the later processing period is shortened, and high-pressure and high-temperature sealing is reliable.
Description
Technical Field
The invention relates to the field of hypersonic wind tunnel test equipment, in particular to a structure for a high-mach-number profile nozzle water-cooling throat of a hypersonic wind tunnel.
Background
The profile spray pipe is a core component of the hypersonic wind tunnel and is an important component of the wind tunnel for ensuring that certain Mach number and certain uniformity of airflow are obtained. The airflow of the wind tunnel enters the contraction section after being rectified by the stabilization section, so that the airflow is gradually accelerated from subsonic velocity to sonic velocity, and then from the throat of the spray pipe, the airflow is accelerated by expansion to reach the given Mach number at the outlet of the spray pipe. The nozzle can only obtain corresponding Mach number by setting a certain ratio of the throat area to the nozzle outlet area, and the maintenance of the shape of the inner profile of the nozzle is an important factor for obtaining the Mach number required by the design at the nozzle outlet.
The high-Mach-number spray pipe of the hypersonic wind tunnel generally has a Mach number more than or equal to 8, and the throat section is an important component of the spray pipe, and the performance of the whole set of spray pipe is directly related to the quality of the spray pipe. The throat section of the high-Mach-number spray pipe bears the temperature up to 800 ℃ and the pressure up to 12MPa, so that the structural design of the throat needs to meet the requirements of strength and rigidity and also needs to consider cooling, and the design of the throat section needs to ensure that the sealing performance of a cooling medium and test gas is good and the long-term use requirement is met.
In order to meet the technical index of good flow field performance of the spray pipe, the processing precision of the profile spray pipe has the inner surface roughness superior to more than 1.6 mu m; the precision of the coordinate data of the inner molded surface is controlled within +/-0.03 mm. The material used for the production of the nozzle throat section therefore firstly has a high strength, good processing properties and also good heat-conducting properties, which are generally not suitable for long-term use at high temperatures if cooling measures are not taken into account. If the cooling structure mode is improper, problems of ablation, deformation and the like of throat inner shell materials can occur in the operation process, so that the Mach number distribution of the nozzle outlet is uneven, the flow field performance index cannot meet the relevant national military standard requirement, the nozzle cannot be put into aircraft model ground test research and application, and the nozzle throat section needs to be scrapped and put into production again.
At present, most high-Mach-number spray pipe throat sections adopt a structural mode of copper alloy and stainless steel vacuum diffusion welding, and the structural mode has the problems that the manufacturing process is complex, the requirement on the processing precision of a diffusion welding tool is high, the processing period is long, the cost is high, the water channel is easily collapsed in the diffusion welding process, the cooling effect is reduced, and the whole throat section is scrapped and needs to be subjected to re-feeding processing due to the fact that the inner shell of the throat cannot be replaced after being damaged.
In order to reduce the manufacturing period and cost of the high-Mach-number nozzle throat section, reduce the manufacturing difficulty and realize that the inner shell of the throat can be replaced when damaged and other parts can be recycled, the development of a high-Mach-number molded nozzle water-cooling throat structure for the hypersonic wind tunnel is urgently needed.
Disclosure of Invention
Aiming at the problems in the related art, the invention provides a structure for a high-Mach-number profile nozzle water-cooling throat of a hypersonic wind tunnel, which aims to overcome the technical problems in the prior related art.
The technical scheme of the invention is realized as follows:
a structure for a high-Mach-number molded surface spray pipe water-cooling throat of a hypersonic wind tunnel comprises a first water channel filler block and a second water channel filler block; the first waterway filler block and the second waterway filler block are arranged on the outer side of the throat inner shell and are fixed on the throat inner shell through filler block connecting screws on two sides; the assembly body of the throat inner shell, the first waterway filler block and the second waterway filler block is arranged in the first outer shell and the second outer shell;
one end of the first shell and one end of the second shell are fixedly connected together through a shell connecting screw, a rubber sealing ring is further arranged between the connecting ends of the first shell and the second shell, and the first shell and the second shell are combined to form a high-Mach-number spray pipe water-cooling throat section;
the throat inner shell is an axisymmetric funnel-shaped metal cylinder, a water channel and a water channel separation rib are arranged outside the throat inner shell, two ends of the throat inner shell are respectively connected with a cylindrical table, and bosses for sealing are respectively arranged on the outer side surfaces of the two cylindrical tables.
Further, the throat inner shell is made of a copper alloy forging, the inner surface of the throat inner shell is machined according to a given throat inner shell inner contour coordinate (x, y), the thickness t2 from the inner surface of the throat inner shell to the lower surface of the water channel is 5-10 mm, the height h2 of the water channel separation rib is 5-10 mm, the thickness t3 of the water channel separation rib is 5-10 mm, the thickness t1 of the cylindrical table is 15-20 mm, and the height h1 of the boss is 2-3 mm;
the width of the water channel meets the requirement that the water flow velocity v at the position of the minimum size of the throat reaches 5-10 m/s, and the specific formula is as follows:
Q＝v×A；
in the formula, Q is the cooling water flow; v is the cooling water flow rate at that location; a is the sectional area of the cooling water flow passage at the position of the minimum size of the throat;
the water channel separation ribs at the minimum size position of the throat inner shell are uniformly distributed along the axial direction and are communicated to the positions of the cylindrical platforms at the two ends of the throat inner shell, and the number of the water channel separation ribs is determined according to the area size of the cooling water flow channel, and the method specifically comprises the following steps:
the number of the water channel partition ribs at the position of the minimum size of the inner shell of the throat channel is n;
the water channel partition ribs positioned at the left end of the throat inner shell are uniformly distributed along the axial direction of the left end and are not communicated with the right end, and the number of the water channel partition ribs is 3n-4 n;
the water channel separating ribs positioned at the right end of the throat inner shell are uniformly distributed along the axial direction of the right end and are not communicated with the left end, and the number of the water channel separating ribs is 2 n.
Further, the first water channel filler block is half of an axisymmetric reducer metal cylinder, the first water channel filler block is made of stainless steel or copper alloy, and the inner surface of the first water channel filler block is machined according to a given mold line coordinate (x + t1, y + t2+ t3) during machining; the length of the first water channel filler block is l-2 x t1 of the length of the throat inner shell, and the diameter of the excircle of the first water channel filler block is the same as the diameter of bosses at two ends of the throat inner shell; round through holes for installing the lining block connecting screws are formed in the sinking platforms processed on two sides of the first water channel lining block large-small-head metal cylinder.
Further, the second waterway filler block is the same in structure and size as the first waterway filler block; a plurality of water inlet holes which are annularly arranged are formed in one end of the first water channel filler block, and a plurality of water outlet holes which are annularly arranged are formed in one end of the second water channel filler block.
Furthermore, one end of the first water channel filler block and one end of the second water channel filler block are assembled with the throat inner shell in an interference fit mode, and the strength of the throat inner shell is enhanced.
Further, the first housing is an axisymmetric metal cylinder made of martensitic stainless steel or austenitic stainless steel; both ends of the first shell are provided with flanges, the flange at the left end of the first shell is provided with a bolt through hole connected with front-section equipment and a sealing groove I, and the flange at the right end of the first shell is provided with a threaded hole matched with a shell connecting screw and a sealing groove II used for mounting a rubber sealing ring; a step hole is formed in one end of the first shell, and a sealing groove III for mounting a graphite winding sealing gasket is formed in the side surface of the step hole; the step hole of first shell one end is including step hole I and step hole II, the diameter of step hole I is the same with anterior segment equipment export diameter, the diameter of step hole II is the same with the diameter of first, second water course filler block assembly wide diameter portion.
Furthermore, a water inlet gathering ring is arranged on the outer circle of the left end flange of the first shell, a water inlet ring groove is machined in the left end flange of the first shell, and the total cross-sectional area of the water inlet ring groove is larger than that of an inlet of the water inlet gathering ring.
Further, the second housing is an axisymmetric metal cylinder made of martensitic stainless steel or austenitic stainless steel; both ends of the second shell are provided with flanges, the flange at the left end of the second shell is provided with screw through holes connected with the first shell, and the number of the screw through holes is consistent with that of the through holes at one end of the first shell; a flange at the right end of the second shell is provided with bolt holes connected with the rear section spray pipe diffusion section, and the number and the size of the bolt holes are consistent with those of the rear section equipment; a step hole is formed in one end of the second shell, and a sealing groove IV for mounting a graphite winding sealing gasket is formed in the side surface of the step hole; the stepped hole in the second shell end comprises a stepped hole III and a stepped hole IV, the diameter of the stepped hole III is the same as that of the small-diameter parts of the first water channel filler block assembly and the second water channel filler block assembly, and the diameter of the stepped hole IV is the same as that of the rear-section equipment inlet.
Furthermore, a water outlet gathering ring is arranged on the excircle of the right end flange of the second shell, a water outlet ring groove is formed in the inner portion of the water outlet gathering ring, and the total area of the water outlet ring groove is the outlet area of the water outlet gathering ring.
The invention has the beneficial effects that:
1. the invention provides a structure for a high-Mach-number molded surface spray pipe water-cooling throat of a hypersonic wind tunnel, wherein a throat section of the structure adopts a full-assembly structure without a welding process, and the influence of welding residual stress on deformation of the throat section in the using process is eliminated;
2. the structure for the high-Mach-number molded surface spray pipe water-cooling throat of the hypersonic wind tunnel, provided by the invention, has the advantages that the manufacturing process of the throat section is simple, the special tooling requirement is avoided, the manufacturing cost is reduced, and the manufacturing period of the throat section is greatly shortened;
3. the structure for the high-Mach-number profile nozzle water-cooling throat of the hypersonic wind tunnel, provided by the invention, can realize replacement of the inner shell of the throat, reduce the maintenance cost after damage in the using process and shorten the later processing period;
4. the structure for the high-Mach-number molded surface spray pipe water-cooling throat of the hypersonic wind tunnel is reliable in high-pressure and high-temperature sealing, does not need large sealing pretightening force, and can generate micro axial extension when an inner shell of the throat is heated in the running process, so that the two ends of the inner shell of the throat are more firmly sealed;
5. the structure for the high-Mach-number molded surface nozzle water-cooling throat of the hypersonic wind tunnel solves the problems of cooling of the high-Mach-number nozzle throat section of the hypersonic wind tunnel and replacement of the inner shell of the throat, and can meet the use requirement of the hypersonic wind tunnel.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a sectional view of a high-Mach-number profile nozzle water-cooled throat structure for a hypersonic wind tunnel according to an embodiment of the invention, taken along an axial direction;
FIG. 2 is a cross-sectional view of a configuration for a high-Mach profile nozzle water-cooled throat of a hypersonic wind tunnel according to an embodiment of the present invention;
FIG. 3 is a front view of an inner shell of a structure for a high-Mach profile nozzle water-cooled throat of a hypersonic wind tunnel according to an embodiment of the invention;
FIG. 4 is a three-dimensional view of an inner shell of a structure for a high-Mach profile nozzle water-cooled throat of a hypersonic wind tunnel according to an embodiment of the invention;
FIG. 5 is a schematic diagram of the dimensions of a portion of an inner shell of a structure for a high-Mach-number profile nozzle water-cooled throat of a hypersonic wind tunnel according to an embodiment of the invention;
FIG. 6 is a three-dimensional view of a first waterway liner block for a configuration of a high-Mach profile nozzle water-cooled throat of a hypersonic wind tunnel according to an embodiment of the present invention;
FIG. 7 is a top view of a first waterway liner block for a configuration of a high-Mach profile nozzle water-cooled throat of a hypersonic wind tunnel according to an embodiment of the present invention;
FIG. 8 is a three dimensional view of a second waterway liner block for a configuration of a high Mach number profile nozzle water-cooled throat of a hypersonic wind tunnel in accordance with an embodiment of the present invention;
FIG. 9 is a top view of a second waterway liner block for a configuration of a high Mach number profile nozzle water-cooled throat of a hypersonic wind tunnel in accordance with an embodiment of the present invention;
FIG. 10 is a schematic illustration of a first housing of a configuration for a high-Mach profile nozzle water-cooled throat of a hypersonic wind tunnel according to an embodiment of the invention;
FIG. 11 is a schematic diagram of a second housing of a structure for a high-Mach profile nozzle water-cooled throat of a hypersonic wind tunnel according to an embodiment of the invention.
In the figure:
1. a water inlet collecting ring; 2. a throat inner shell; 3. a first waterway filler block; 4. a first housing; 5. a second housing; 6. a water outlet collecting ring; 7. a second waterway filler block; 8. a housing attachment screw; 9. a pad attachment screw; 10. a water channel; 11. water channel partition ribs; 12. a cylindrical table; 13. a boss; 14. sinking a platform; 15. a circular through hole; 16. a water inlet hole; 17. a water outlet hole; 18. a threaded hole; 19. a sealing groove I; 20. a sealing groove II; 21. a sealing groove III; 22. a step hole I; 23. a step hole II; 24. a water inlet ring groove; 25. a seal groove IV; 26. a step hole III; 27. a step hole IV; 28. and a water outlet ring groove.
Detailed Description
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 that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
The first embodiment is as follows:
in accordance with an embodiment of the present invention,
referring to fig. 1 to 11, a structure of a high mach number profile nozzle water-cooled throat for a hypersonic wind tunnel includes a first waterway filler block 3 and a second waterway filler block 7, wherein the first waterway filler block 3 and the second waterway filler block 7 are installed outside a throat inner shell 2, and the first waterway filler block 3 and the second waterway filler block 7 are fixed on the throat inner shell 2 by filler block connecting screws 9 on both sides; the assembly body of the throat inner shell 2, the first waterway filler block 3 and the second waterway filler block 7 is arranged in the first outer shell 4 and the second outer shell 5;
one end of the first shell 4 and one end of the second shell 5 are fixedly connected together through a shell connecting screw 8, a rubber sealing ring is further arranged between the connecting ends of the first shell 4 and the second shell 5, and the first shell 4 and the second shell 5 are combined to form a high-Mach-number spray pipe water-cooling throat section;
the throat inner shell 2 is an axisymmetric funnel-shaped metal cylinder, a water channel 10 and a water channel separation rib 11 are arranged outside the throat inner shell 2, two ends of the throat inner shell 2 are respectively connected with a cylindrical table 12, and bosses 13 for sealing are respectively arranged on the outer side surfaces of the two cylindrical tables 12.
In the embodiment, the throat inner shell 2 is made of a copper alloy forging, the inner surface of the throat inner shell is machined according to a given inner contour coordinate (x, y) of the throat inner shell 2, the thickness t2 from the inner surface of the throat inner shell 2 to the lower surface of the water channel 10 is 5-10 mm, the height h2 of the water channel separation rib 11 is 5-10 mm, the thickness t3 of the water channel separation rib 11 is 5-10 mm, the thickness t1 of the cylindrical table 12 is 15-20 mm, and the height h1 of the boss 13 is 2-3 mm;
wherein, the width of the water channel 10 meets the requirement that the water flow velocity v at the position of the minimum size of the throat reaches 5-10 m/s, and the specific formula is as follows:
Q＝v×A；
in the formula, Q is the cooling water flow; v is the cooling water flow rate at that location; a is the sectional area of the cooling water flow passage at the position of the minimum size of the throat;
the water channel separation ribs 11 at the minimum size position of the throat inner shell 2 are uniformly distributed along the axial direction and are communicated to the positions of the cylindrical platforms 12 at the two ends of the throat inner shell 2, and the number of the water channel separation ribs 11 is determined according to the area size of the cooling water flow channel, and specifically comprises the following steps:
the number of the water channel separation ribs 11 at the position of the throat inner shell 2 with the minimum size is n;
the water channel partition ribs 11 positioned at the left end of the throat inner shell 2 are uniformly distributed along the axial direction of the left end and are not communicated with the right end, and the number of the water channel partition ribs is 3n-4 n;
the water channel partition ribs 11 positioned at the right end of the throat inner shell 2 are uniformly distributed along the axial direction of the right end and are not communicated with the left end, and the number of the water channel partition ribs is 2 n.
In this embodiment, the first waterway lining block 3 is a half of an axisymmetric reducer metal cylinder, the first waterway lining block 3 is made of stainless steel or copper alloy, and the inner surface of the first waterway lining block 3 is machined according to a given profile coordinate (x + t1, y + t2+ t3) during machining; the length of the first water channel filler block 3 is l-2 x t1 of the length of the throat inner shell 2, and the diameter of the excircle of the first water channel filler block 3 is the same as the diameter of the bosses 13 at the two ends of the throat inner shell 2; round through holes 15 for installing the lining block connecting screws 9 are formed in the sinking platforms 14 processed on the two sides of the metal cylinder with the big end and the small end of the first water channel lining block 3.
In the present embodiment, the second waterway lining block 7 is the same in structure and size as the first waterway lining block 3; a plurality of water inlet holes 16 which are annularly arranged are formed in one end of the first water channel filler block 3, and a plurality of water outlet holes 17 which are annularly arranged are formed in one end of the second water channel filler block 7.
In this embodiment, one end of the first waterway filler block 3 and one end of the second waterway filler block 7 are assembled with the throat inner shell 2 in an interference fit manner, so as to reinforce the strength of the throat inner shell 2.
In the present embodiment, the first housing 4 is an axisymmetric metal cylinder made of martensitic stainless steel or austenitic stainless steel; both ends of the first shell 4 are provided with flanges, the flange at the left end of the first shell 4 is provided with a bolt through hole connected with front-section equipment and a sealing groove I19, and the flange at the right end of the first shell 4 is provided with a threaded hole 18 matched with the shell connecting screw 8 and a sealing groove II 20 used for mounting a rubber sealing ring; a step hole is formed in one end of the first shell 4, and a sealing groove III 21 for mounting a graphite winding sealing gasket is formed in the side surface of the step hole; the stepped hole at one end of the first shell 4 comprises a stepped hole I22 and a stepped hole II 23, the diameter of the stepped hole I22 is the same as the diameter of an outlet of front-section equipment, and the diameter of the stepped hole II 23 is the same as the diameter of the large-diameter part of the first water channel filler block assembly and the diameter of the large-diameter part of the second water channel filler block assembly.
In this embodiment, the water inlet collecting ring 1 is disposed on the outer circle of the left end flange of the first housing 4, the water inlet ring groove 24 is formed in the left end flange of the first housing 4, and the total cross-sectional area of the water inlet ring groove 24 is larger than the cross-sectional area of the inlet of the water inlet collecting ring 1.
In the present embodiment, the second housing 5 is an axisymmetric metal cylinder made of martensitic stainless steel or austenitic stainless steel; both ends of the second shell 5 are provided with flanges, the flange at the left end of the second shell 5 is provided with screw through holes connected with the first shell 4, and the number of the screw through holes is consistent with that of the through holes at one end of the first shell 4; a flange at the right end of the second shell 5 is provided with bolt holes connected with a rear section spray pipe diffusion section, and the number and the size of the bolt holes are consistent with those of rear section equipment; a step hole is formed in one end of the second shell 5, and a sealing groove IV 25 for mounting a graphite winding sealing gasket is formed in the side surface of the step hole; the stepped hole in one end of the second housing 5 comprises a stepped hole III 26 and a stepped hole IV 27, the diameter of the stepped hole III 26 is the same as that of the small-diameter parts of the first and second waterway filler block assemblies, and the diameter of the stepped hole IV 27 is the same as that of the inlet of the rear-section equipment.
In this embodiment, the right flange of the second housing 5 is provided with a water outlet collecting ring 6 on an excircle thereof, the water outlet collecting ring 6 is provided with a water outlet ring groove 28 therein, and the total area of the water outlet ring groove 28 is the outlet area of the water outlet collecting ring 6.
The invention has the beneficial effects that:
the invention relates to a structure of a high-Mach-number molded surface spray pipe water-cooling throat for a hypersonic wind tunnel.A throat section adopts a full-assembly structure, and a welding procedure is avoided, so that the influence of welding residual stress on deformation of the throat section in the using process is eliminated; the manufacturing process of the throat section is simple, no special tooling requirement exists, the manufacturing cost is reduced, and the manufacturing period of the throat section is greatly shortened; the replacement of the inner shell of the throat can be realized, the maintenance cost after the inner shell is damaged in the using process is reduced, and the later-stage processing period is shortened; the throat inner shell sealing structure has reliable high-pressure and high-temperature sealing, does not need large sealing pretightening force, and can generate micro axial extension when being heated in the operation process, so that the sealing at two ends of the throat inner shell is firmer; the problems of cooling the throat section of the high-Mach-number spray pipe of the hypersonic wind tunnel and replacement of the inner shell of the throat are solved, and the use requirement of the hypersonic wind tunnel can be met; and can be popularized and applied to the similar axisymmetric structure equipment which needs high-temperature cooling.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. A structure for a high-Mach-number molded surface nozzle water-cooling throat of a hypersonic wind tunnel is characterized by comprising a first water channel filler block (3) and a second water channel filler block (7); the first waterway filler block (3) and the second waterway filler block (7) are arranged on the outer side of the throat inner shell (2), and the first waterway filler block (3) and the second waterway filler block (7) are fixed on the throat inner shell (2) through filler block connecting screws (9) on two sides; the assembly body of the throat inner shell (2), the first waterway filler block (3) and the second waterway filler block (7) is arranged in the first outer shell (4) and the second outer shell (5);
one end of the first shell (4) and one end of the second shell (5) are fixedly connected together through a shell connecting screw (8), a rubber sealing ring is further arranged between the connecting end parts of the first shell (4) and the second shell (5), and the first shell (4) and the second shell (5) are combined to form a high-Mach-number spray pipe water-cooling throat section;
the throat inner shell (2) is an axisymmetric funnel-shaped metal cylinder, a water channel (10) and a water channel separation rib (11) are arranged outside the throat inner shell (2), two ends of the throat inner shell (2) are respectively connected with a cylindrical table (12), and bosses (13) for sealing are respectively arranged on the outer side surfaces of the two cylindrical tables (12).
2. The structure of the high-Mach-number profile nozzle water-cooling throat for the hypersonic wind tunnel according to claim 1, characterized in that the throat inner shell (2) is made of a copper alloy forging, the inner surface of the throat inner shell (2) is machined according to given inner profile coordinates (x, y) of the throat inner shell, the thickness t2 from the inner surface of the throat inner shell (2) to the lower surface of the water channel (10) is 5-10 mm, the height h2 of the water channel partition rib (11) is 5-10 mm, the thickness t3 of the water channel partition rib (11) is 5-10 mm, the thickness t1 of the cylindrical table (12) is 15-20 mm, and the height h1 of the boss (13) is 2-3 mm;
wherein, the width of the water channel (10) meets the requirement that the water flow velocity v at the position of the minimum size of the throat reaches 5-10 m/s, and the specific formula is as follows:
Q＝v×A；
in the formula, Q is the cooling water flow; v is the cooling water flow rate at that location; a is the sectional area of the cooling water flow passage at the position of the minimum size of the throat;
the water channel separation ribs (11) at the minimum size position of the throat inner shell (2) are uniformly distributed along the axial direction and are communicated to the positions of the cylindrical platforms (12) at the two ends of the throat inner shell (2), and the number of the water channel separation ribs (11) is determined according to the area size of a cooling water flow channel, and specifically comprises the following steps:
the number of the water channel separation ribs (11) at the position of the minimum size of the throat inner shell (2) is n;
the water channel separation ribs (11) positioned at the left end of the throat inner shell (2) are uniformly distributed along the axial direction of the left end and are not communicated with the right end, and the number of the water channel separation ribs is 3n-4 n;
the water channel separating ribs (11) positioned at the right end of the throat inner shell (2) are axially and uniformly distributed along the right end and are not communicated with the left end, and the number of the water channel separating ribs is 2 n.
3. The structure of the high-mach-number profile nozzle water-cooling throat for the hypersonic wind tunnel according to claim 2, wherein the first waterway filler block (3) is a half of an axisymmetric reducer metal cylinder, the first waterway filler block (3) is made of stainless steel or copper alloy, and the inner surface of the first waterway filler block (3) is machined according to given profile coordinates (x + t1, y + t2+ t3) during machining; the length of the first water channel filler block (3) is l-2 x t1 of the length of the throat inner shell (2), and the diameter of the excircle of the first water channel filler block (3) is the same as the diameter of bosses (13) at two ends of the throat inner shell (2); round through holes (15) used for installing lining block connecting screws (9) are formed in sinking platforms (14) machined on two sides of the large and small metal cylinders of the first water channel lining block (3).
4. The structure for the high-mach-number profile nozzle water-cooled throat of a hypersonic wind tunnel according to claim 1, wherein the second waterway filler block (7) has the same structure and size as the first waterway filler block (3); a plurality of water inlet holes (16) which are annularly arranged are formed in one end of the first water channel filler block (3), and a plurality of water outlet holes (17) which are annularly arranged are formed in one end of the second water channel filler block (7).
5. The structure of the high-mach-number profile nozzle water-cooling throat for the hypersonic wind tunnel according to claim 1, wherein one end of the first water channel filler block (3) and one end of the second water channel filler block (7) are assembled with the inner throat shell (2) in an interference fit manner, so that the inner throat shell (2) is strengthened.
6. The structure for the high-mach-number profile nozzle water-cooling throat of a hypersonic wind tunnel according to claim 1, characterized in that the first shell (4) is an axisymmetric metal cylinder made of martensitic stainless steel or austenitic stainless steel; both ends of the first shell (4) are provided with flanges, the flange at the left end of the first shell (4) is provided with a bolt through hole connected with front-section equipment and a sealing groove I (19), and the flange at the right end of the first shell (4) is provided with a threaded hole (18) matched with a shell connecting screw (8) and a sealing groove II (20) used for mounting a rubber sealing ring; a step hole is formed in one end of the first shell (4), and a sealing groove III (21) for mounting a graphite winding sealing gasket is formed in the side surface of the step hole; the step hole of first shell (4) one end is including step hole I (22) and step hole II (23), the diameter of step hole I (22) is the same with anterior segment equipment export diameter, the diameter of step hole II (23) is the same with the diameter of first, second water course filler block assembly wide diameter portion.
7. The structure for the high-mach-number profile nozzle water-cooling throat of the hypersonic wind tunnel according to claim 6, wherein a water inlet collecting ring (1) is arranged on the outer circle of the left end flange of the first shell (4), a water inlet ring groove (24) is machined in the left end flange of the first shell (4), and the total cross-sectional area of the water inlet ring groove (24) is larger than the cross-sectional area of the inlet of the water inlet collecting ring (1).
8. The structure for the high-mach-number profile nozzle water-cooling throat of a hypersonic wind tunnel according to claim 1, characterized in that the second shell (5) is an axisymmetric metal cylinder made of martensitic stainless steel or austenitic stainless steel; both ends of the second shell (5) are provided with flanges, the flange at the left end of the second shell (5) is provided with screw through holes connected with the first shell (4), and the number of the screw through holes is consistent with that of the through holes at one end of the first shell (4); a flange at the right end of the second shell (5) is provided with bolt holes connected with a rear section spray pipe diffusion section, and the number and the size of the bolt holes are consistent with those of rear section equipment; a step hole is formed in one end of the second shell (5), and a sealing groove IV (25) for mounting a graphite winding sealing gasket is formed in the side surface of the step hole; the step hole in the inner part of one end of the second shell (5) comprises a step hole III (26) and a step hole IV (27), the diameter of the step hole III (26) is the same as that of the small-diameter parts of the first water channel filler block assembly and the second water channel filler block assembly, and the diameter of the step hole IV (27) is the same as that of the inlet of the rear-section equipment.
9. The structure for the high-mach-number profile nozzle water-cooling throat of the hypersonic wind tunnel according to claim 8, wherein a water outlet gathering ring (6) is arranged on the outer circle of a right-end flange of the second shell (5), a water outlet ring groove (28) is formed in the water outlet gathering ring (6), and the total area of the water outlet ring groove (28) is the outlet area of the water outlet gathering ring (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011522853.3A CN112727860B (en) | 2020-12-22 | 2020-12-22 | Structure for high-Mach-number molded surface spray pipe water-cooling throat of hypersonic wind tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011522853.3A CN112727860B (en) | 2020-12-22 | 2020-12-22 | Structure for high-Mach-number molded surface spray pipe water-cooling throat of hypersonic wind tunnel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112727860A true CN112727860A (en) | 2021-04-30 |
| CN112727860B CN112727860B (en) | 2022-04-01 |
Family
ID=75605006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011522853.3A Active CN112727860B (en) | 2020-12-22 | 2020-12-22 | Structure for high-Mach-number molded surface spray pipe water-cooling throat of hypersonic wind tunnel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112727860B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114112286A (en) * | 2021-12-01 | 2022-03-01 | 中国空气动力研究与发展中心超高速空气动力研究所 | Hypersonic wind tunnel axisymmetric profile nozzle fitting throat section design method |
| CN114252230A (en) * | 2022-03-02 | 2022-03-29 | 中国空气动力研究与发展中心超高速空气动力研究所 | Distribution device for cooling water of high-Mach-number spray pipe of conventional hypersonic wind tunnel |
| CN114282326A (en) * | 2022-03-03 | 2022-04-05 | 中国空气动力研究与发展中心超高速空气动力研究所 | Structural design method for axisymmetric nozzle of hypersonic wind tunnel |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0552701A (en) * | 1991-08-29 | 1993-03-02 | Kobe Steel Ltd | Cooling method for nozzle of supersonic wind tunnel |
| JPH08284752A (en) * | 1995-04-11 | 1996-10-29 | Mitsubishi Heavy Ind Ltd | Supersonic exhaust nozzle for aircraft engine |
| GB2336324A (en) * | 1998-04-15 | 1999-10-20 | Celtic Vacuums Limited | Conveying of hot particulate material |
| US20070137717A1 (en) * | 2001-02-26 | 2007-06-21 | Vakili Ahmad D | Structure and method for improving flow uniformity and reducing turbulence |
| US7401505B1 (en) * | 2007-01-09 | 2008-07-22 | The United States Of America As Represented By The Secretary Of The Navy | Low cost wind tunnel for supersonic and hypersonic aerothermal testing |
| KR20120105737A (en) * | 2011-03-16 | 2012-09-26 | 재단법인 포항산업과학연구원 | Corrosion simulator |
| CN104406763A (en) * | 2014-10-17 | 2015-03-11 | 北京航天益森风洞工程技术有限公司 | Spray pipe throat channel segment water cooling structure |
| CN105181290A (en) * | 2015-10-13 | 2015-12-23 | 北京航天长征飞行器研究所 | High-temperature jet pipe used for combustion gas flow wind tunnel |
| CN206029008U (en) * | 2016-08-17 | 2017-03-22 | 湖北三江航天红阳机电有限公司 | Spray tube throat auxiliary fixtures |
| CN108168832A (en) * | 2016-12-08 | 2018-06-15 | 中国航空工业集团公司沈阳空气动力研究所 | A kind of throat structure for improving tube wind tunnel experiment Reynolds number |
| CN109695784A (en) * | 2018-12-17 | 2019-04-30 | 北京动力机械研究所 | A kind of nozzle throat section of cooling trough insert |
| CN110823501A (en) * | 2019-11-15 | 2020-02-21 | 中国空气动力研究与发展中心超高速空气动力研究所 | Water-cooling optical test flange for hypersonic-velocity low-density wind tunnel stabilization section |
-
2020
- 2020-12-22 CN CN202011522853.3A patent/CN112727860B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0552701A (en) * | 1991-08-29 | 1993-03-02 | Kobe Steel Ltd | Cooling method for nozzle of supersonic wind tunnel |
| JPH08284752A (en) * | 1995-04-11 | 1996-10-29 | Mitsubishi Heavy Ind Ltd | Supersonic exhaust nozzle for aircraft engine |
| GB2336324A (en) * | 1998-04-15 | 1999-10-20 | Celtic Vacuums Limited | Conveying of hot particulate material |
| US20070137717A1 (en) * | 2001-02-26 | 2007-06-21 | Vakili Ahmad D | Structure and method for improving flow uniformity and reducing turbulence |
| US7401505B1 (en) * | 2007-01-09 | 2008-07-22 | The United States Of America As Represented By The Secretary Of The Navy | Low cost wind tunnel for supersonic and hypersonic aerothermal testing |
| KR20120105737A (en) * | 2011-03-16 | 2012-09-26 | 재단법인 포항산업과학연구원 | Corrosion simulator |
| CN104406763A (en) * | 2014-10-17 | 2015-03-11 | 北京航天益森风洞工程技术有限公司 | Spray pipe throat channel segment water cooling structure |
| CN105181290A (en) * | 2015-10-13 | 2015-12-23 | 北京航天长征飞行器研究所 | High-temperature jet pipe used for combustion gas flow wind tunnel |
| CN206029008U (en) * | 2016-08-17 | 2017-03-22 | 湖北三江航天红阳机电有限公司 | Spray tube throat auxiliary fixtures |
| CN108168832A (en) * | 2016-12-08 | 2018-06-15 | 中国航空工业集团公司沈阳空气动力研究所 | A kind of throat structure for improving tube wind tunnel experiment Reynolds number |
| CN109695784A (en) * | 2018-12-17 | 2019-04-30 | 北京动力机械研究所 | A kind of nozzle throat section of cooling trough insert |
| CN110823501A (en) * | 2019-11-15 | 2020-02-21 | 中国空气动力研究与发展中心超高速空气动力研究所 | Water-cooling optical test flange for hypersonic-velocity low-density wind tunnel stabilization section |
Non-Patent Citations (2)
| Title |
|---|
| 何宁等: "高温长时间风洞喷管冷却结构CFD研究", 《工程科学学报》 * |
| 毕林等: "高超声速低密度风洞带中心锥型扩压器性能研究", 《实验流体力学》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114112286A (en) * | 2021-12-01 | 2022-03-01 | 中国空气动力研究与发展中心超高速空气动力研究所 | Hypersonic wind tunnel axisymmetric profile nozzle fitting throat section design method |
| CN114112286B (en) * | 2021-12-01 | 2023-02-28 | 中国空气动力研究与发展中心超高速空气动力研究所 | Hypersonic wind tunnel axisymmetric profile spray pipe fitting throat section design method |
| CN114252230A (en) * | 2022-03-02 | 2022-03-29 | 中国空气动力研究与发展中心超高速空气动力研究所 | Distribution device for cooling water of high-Mach-number spray pipe of conventional hypersonic wind tunnel |
| CN114282326A (en) * | 2022-03-03 | 2022-04-05 | 中国空气动力研究与发展中心超高速空气动力研究所 | Structural design method for axisymmetric nozzle of hypersonic wind tunnel |
| CN114282326B (en) * | 2022-03-03 | 2022-05-10 | 中国空气动力研究与发展中心超高速空气动力研究所 | Structural design method for hypersonic wind tunnel axisymmetric nozzle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112727860B (en) | 2022-04-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112727860B (en) | Structure for high-Mach-number molded surface spray pipe water-cooling throat of hypersonic wind tunnel | |
| CN114282326B (en) | Structural design method for hypersonic wind tunnel axisymmetric nozzle | |
| CN104244557A (en) | Atmosphere protection coaxial powder feeding plasma gun | |
| CN110848494B (en) | Whole water-cooled spray tube | |
| CN110712764A (en) | Subsonic velocity envelope ablation test device used under high enthalpy condition | |
| CN115740965B (en) | Method for manufacturing integral rocket engine combustion chamber | |
| CN112945507B (en) | Hypersonic wind tunnel axisymmetric spray pipe | |
| CN109570318A (en) | A kind of gas turbine exhaust road abutment wall sheet metal component fluid forming method | |
| CN113324261A (en) | Diffuser with rectifying plate and application thereof | |
| CN109883713B (en) | Process spray pipe capable of reducing axial thermal stress | |
| US11028707B2 (en) | Zoned surface roughness | |
| CN115680781B (en) | Impeller exhaust device with cooling function | |
| CN110906365A (en) | Light and uniformly cooled longitudinal corrugated heat shield | |
| CN113532837B (en) | Test tool structure for verifying pressure of special-shaped spray pipe | |
| CN109695783A (en) | A kind of nozzle throat section with ring stiffener | |
| CN113153574B (en) | Reusable quick-connection sandwich type combustion chamber | |
| CN211253078U (en) | Subsonic velocity envelope ablation test device used under high enthalpy condition | |
| CN210113386U (en) | Split type power turbine structure containing static pressure seal | |
| CN114810236A (en) | Exhaust casing structure of gas turbine core machine | |
| CN111468876B (en) | 400 MW-level heavy gas turbine nozzle fairing welding and positioning device | |
| CN208555517U (en) | A kind of novel water ring cooling for copper pipe rolling special roller | |
| CN114192798A (en) | Composite manufacturing method for quick near-net-shape engine combustion chamber | |
| CN220471602U (en) | Fluidized bed nozzle | |
| CN210113387U (en) | Split type power turbine structure with pressure self-compensation | |
| CN103711570A (en) | Intercooler pipe with high airflow smoothness |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |