CN109269756A - A kind of water-cooled jet pipe - Google Patents
A kind of water-cooled jet pipe Download PDFInfo
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- CN109269756A CN109269756A CN201811101783.7A CN201811101783A CN109269756A CN 109269756 A CN109269756 A CN 109269756A CN 201811101783 A CN201811101783 A CN 201811101783A CN 109269756 A CN109269756 A CN 109269756A
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- water
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- inner casing
- cooling
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- 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
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- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The present invention relates to a kind of water-cooled jet pipes.The water-cooled jet pipe includes the inner casing, water holding jacket and shell being sequentially coaxially arranged from the inside to the outside；Gap is all had between water holding jacket and inner casing and shell, the gap forms cooling-water duct；At least one water inlet and at least one water outlet are provided on shell, the water inlet is connected to cooling-water duct with the water outlet；Circumferential step is provided between water holding jacket and shell, at least one described water inlet and at least one described water outlet are located at the two sides of the axial direction of circumferential step, enter cooling water from least one described water inlet, and is flowed out after a week from least one described water outlet along cooling-water duct circulation.Water-cooled jet pipe in the present invention has reasonable cooling structure, cooling efficiency is high, can guarantee that water flow quickly flows inside the jet pipe, and described jet pipe each section can equably be cooled, can guarantee the jet pipe can in the case where high-temperature gas is passed through long-time steady operation.
Description
Technical field
The invention belongs to the technical field of jet pipe more particularly to a kind of water-cooled jet pipes.
Background technique
Plasma wind tunnel is in the ground experiment research work of spacecraft thermo-resistance material and structure generally using electricity
The mode of arc or inductively coupled discharge generates plasma, and the temperature of plasma gas is up to 4000~10000K.Therefore,
Each section of wind-tunnel is required to reasonably cool down.
Jet pipe is the important component of plasma wind tunnel, generally generates plasma jet using jet pipe with effective mould
Intend incoming flow environment of the hypersonic aerospace craft in atmosphere when flight.But jet pipe is generally metal material, when can not be long
Between be subjected to the heating of high-temperature gas, jet pipe itself could be guaranteed while generating high-temperature gas jet stream by needing reasonably to cool down
The safety of structure.
Currently, carrying out cooling conventional mode to jet pipe mainly has: (1) to jet pipe outer wall water drenching；In this way,
Cooling effect is uneven, and is unable to satisfy the Cooling Heat Transfer demand of jet pipe under the very high state of gas temperature.(2) jet pipe is using double
Layer structure, forms gap between two layers, is passed through cooling water and is cooled down；This mode is smaller for size, heating time is shorter,
Heated not serious jet pipe is appropriate, but for the jet pipe of larger structure, is easy be partially formed dead water region, water velocity
Too slow, heat convection effect is unobvious, and jet pipe still locally is possible to overheat.
Summary of the invention
The object of the present invention is to provide a kind of cooling efficiency height, cooling uniform water-cooled jet pipe, to solve the prior art
Present at least one technical problem.
To achieve the goals above, the present invention provides a kind of water-cooled jet pipes, including are sequentially coaxially arranged from the inside to the outside
Inner casing, water holding jacket and shell；Gap, the gap shape are all had between the water holding jacket and the inner casing and the shell
At cooling-water duct；Be provided at least one water inlet and at least one water outlet on the shell, the water inlet with it is described
Water outlet is connected to the cooling-water duct；Be provided with circumferential step between the water holding jacket and the shell, it is described at least
One water inlet and at least one described water outlet are located at the two sides of the axial direction of the circumferential step, make cooling water from described
At least one water inlet enters, and flows out after a week from least one described water outlet along cooling-water duct circulation.
Preferably, the shell be equipped with multiple water inlets and multiple water outlets, multiple water inlets and
Multiple water outlets being provided at circumferentially spaced along the shell, and between multiple water inlets and multiple water outlets
It is staggered in the circumferential direction of the shell.
Preferably, there are three water inlet and three water outlets for setting on the shell.
Preferably, the water holding jacket is arranged in parallel close to the side of the inner casing with the inner casing, so that the water holding jacket
Gap between the inner casing is wide.
Preferably, the wall thickness of the inner casing is 3~5mm；And/or it is additionally provided on the periphery of the inner casing a plurality of along described interior
The circumferentially spaced reinforcing rib of shell.
Preferably, the reinforcing rib is in contact with the inner wall of the water holding jacket, makes per two adjacent reinforcing ribs it
Between form the independent flow passage that passes through of a Cooling Water.
Preferably, the width in the gap between the water holding jacket and the shell is 3~5mm.
Preferably, the inner casing and/or the water holding jacket are made of red copper material；And/or the shell is using stainless
Steel material is made.
Preferably, the both ends of the shell and the inner casing are sealed by sealing ring.
Preferably, the shape of the water-cooled jet pipe is axial symmetry type.
The present invention at least have compared with prior art it is following the utility model has the advantages that
(1) water-cooled jet pipe of the invention makes inner casing and outer by the water holding jacket being coaxially disposed between inner casing and shell
The cooling-water duct around water holding jacket is formed between shell, and circumferential step is set between shell and water holding jacket, water inlet and water outlet
Mouth is located at the two sides of circumferential step, enters from the inlet cooling water, and recycles after a week just along the cooling-water duct
It can be flowed out from water outlet, improve the utilization rate of cooling water, guarantee cooling water flows through range, avoids hot-spot, Jin Erti
The cooling efficiency of high jet pipe enables jet pipe long-time steady operation under high temperature environment.
(2) the water-cooled jet pipe in the present invention is staggeredly equipped with multiple water inlets and multiple institutes in the circumferential direction of shell
Water outlet is stated, forms multiple cooling water channels in the circumferential, makes the cooling of jet pipe more evenly, and every road cooling water is logical in cooling water
It is flowed out after quickly taking away heat after road circulation from nearest water outlet, improves cooling efficiency.
Detailed description of the invention
Attached drawing of the present invention only provides for the purpose of illustration, in figure the ratio Yu quantity of each component not necessarily with actual product one
It causes.
Fig. 1 is the cross-sectional view of a specific embodiment of water-cooled jet pipe of the invention.
Fig. 2 is the partial sectional view of water holding jacket in Fig. 1.
Fig. 3 is the side view of Fig. 1.
Fig. 4 is the cross-sectional view for the inner casing that periphery is provided with reinforcing rib in a specific embodiment of the invention.
Fig. 5 is the cross-sectional view of A-A in Fig. 4.
In figure: 1: inner casing；2: shell；3: water holding jacket；4: admitting pipe joint；5: titting water outlet；6: cooling-water duct；7:
Circumferential step；8: reinforcing rib；9: preceding sealing ring；10: rear sealing ring.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached in the embodiment of the present invention
Figure, is clearly and completely described technical solution of the present invention, it is clear that described embodiment is a part of the invention
Embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making wound
Every other embodiment obtained under the premise of the property made is worked, shall fall within the protection scope of the present invention.
The present invention provides a kind of water-cooled jet pipe, Fig. 1 and Fig. 3 are that one of water-cooled jet pipe of the invention is specific respectively
The cross-sectional view and side view of embodiment.In the present invention, the water-cooled jet pipe includes sequentially coaxially being arranged from the inside to the outside
Inner casing 1, water holding jacket 3 and shell 2；Gap is all had between the water holding jacket 3 and the inner casing 1 and the shell 2, between described
Gap forms cooling-water duct 6；At least one water inlet and at least one water outlet, the water inlet are provided on the shell 2
It is connected to the cooling-water duct 6 with the water outlet；Circumferential step is provided between the water holding jacket 3 and the shell 2
7, the water inlet and the water outlet are located at the two sides of the axial direction of the circumferential step 7, make cooling water from described
At least one water inlet enters, and flows out after a week from least one described water outlet along cooling-water duct circulation.This hair
The sandwich of water-cooled jet pipe in bright forms the cooling-water duct 6 of circulation, passes through the cooling flowed in cooling-water duct 6
Water takes away heat, separates inlet and outlet in the axial direction by the circumferential step 7 being circumferentially arranged along inner casing 1, makes cold
But it could be flowed out from water outlet after water must turn back around the axial direction of water holding jacket 3, design cooling water according to cooling-water duct 6 and flow
It is dynamic, the utilization rate of cooling water is improved, guarantee cooling water flows through range, avoids hot-spot, and then improve the cooling of jet pipe
Efficiency enables jet pipe long-time steady operation under high temperature environment.
In some preferred embodiments, the installation fixation of water holding jacket 3 can by welding (such as spot welding connection) with
Shell 2 connects, and fixes water holding jacket 3 and the relative position of shell 2 and inner casing 1.It is highly preferred that water holding jacket 3 passes through circumferential step 7
(such as by be welded and fixed or close-fitting is fixed) is connected and fixed with the inside of shell 2.
It should be noted that circumferential step of the present invention refers to the structure for being higher by water holding jacket outer wall or outer casing inner wall,
It can be the block being circumferentially arranged that two sides are connect with shell and water holding jacket respectively；It is also possible to tie with the protrusion of shell one
Structure (inner wall of opposite shell), bulge-structure is in contact with water holding jacket outer wall at this time；It is also possible to the protrusion with water holding jacket one
Structure (outer wall of opposite water holding jacket), at this point, bulge-structure is in contact with the inner wall of shell.In this embodiment, it is preferred that week
To the bulge-structure that step 7 is with water holding jacket one, facilitate machine-shaping, such as the circumferential step 7 can be the folder water
The periphery of set 3 removes the annular boss that any middle position at both ends is convexed to form to the shell 2.
In the present invention, water inlet position of the water inlet as the cooling-water duct 6, described in the water outlet is used as
The two sides of the circumferential step 7 are arranged in the water exit position of cooling-water duct 6, the water inlet and the water outlet, for dividing
Every water inlet position and water exit position, pass through water inlet and water outlet cooling water will not there is a phenomenon where go here and there water.In this hair
In bright, such as the water inlet is located at the front side (left side of circumferential step as shown in Figure 1) of the circumferential step 7, it is described go out
The mouth of a river is located at the rear side (right side of circumferential step as shown in Figure 1) of the circumferential step 7.
The present invention is not particularly limited the water holding jacket 3, as long as the water holding jacket 3 and the inner casing 1 and described outer
Shell 2 matches, so that the gap phase between the gap and the water holding jacket 3 and shell 2 between the water holding jacket 3 and inner casing 1
The logical cooling-water duct 6 to formation for Cooling Water flowing.
According to some preferred embodiments, the water inlet is connected by admitting pipe joint 4 and the cooling-water duct 6
Logical, the water outlet is connected to by titting water outlet 5 with the cooling-water duct 6.
According to some preferred embodiments, the middle position of the periphery of the water holding jacket 3 is arranged in the circumferential step 7
It sets, the medium position refers to the medium position of 3 axial direction of water holding jacket.
In the present invention, it is provided with circumferential step 7 between the water holding jacket 3 and the shell 2, can effectively separates cooling
The water inlet position of water and water exit position, so that being formd between water holding jacket 3 and inner casing 1 and between water holding jacket 3 and shell 2 rationally
Runner, the cooling water into cooling-water duct 6 is quickly and effectively flowed along the runner of design, will not occur go here and there water
The phenomenon that；Water-cooled jet pipe heat convection effect in the present invention is good, and cooling efficiency is high, and described jet pipe each section can uniformly have
It is cooled to effect, there is no flow slower dead water region.
Water-cooled jet pipe of the present invention is generally used for the jet stream of high-temperature gas, can be in high-temperature gas (high-temperature gas
Temperature even up to 10000K) be passed through in the case where long-time steady operation, the present invention in water-cooled jet pipe self structure
Safety it is good.
The working principle of water-cooled jet pipe of the present invention for example can be with are as follows: high-temperature gas is from the water-cooled jet pipe
Center (center of inner casing) is flowed through, and the inner wall (inside) of the jet pipe inner casing 1 is heated serious, needs cooling water along inner casing 1
Outer wall (outside) flow at high speed cools down it.Cooling water flows into shell 2 from admitting pipe joint 4, along water holding jacket 3 and shell
Gap between 2, the gap formed into water holding jacket 3 and inner casing 1, later along 1 outer wall of inner casing, from one end of the inner casing 1
(such as front end) flow to the other end (such as rear end), and further around water holding jacket 3 is crossed, last cooling water is flowed out from titting water outlet 5.Especially
Illustrate, the front end of the inner casing 1 can be for example the left end of inner casing 1 shown in Fig. 1, and the rear end of the inner casing 1 is for example
It can be the right end of inner casing 1 shown in Fig. 1.
According to some preferred embodiments, the shell 2 is equipped with multiple water inlets and multiple water outlets,
Multiple water inlets and multiple water outlets are uniformly arranged along the preferably interval that is provided at circumferentially spaced of the shell, and
It is staggered in the circumferential direction of the shell between multiple water inlets and multiple water outlets and preferably staggeredly uniformly sets
It sets.Illustrate, multiple water inlets and multiple water outlets in the axial direction of shell 2 not in one plane.
It can be seen that the water inlet with the water outlet is staggeredly to be spaced from side view Fig. 3 of the specific embodiment of the present invention
, i.e. a water outlet is distributed between two water inlets.In the present invention, the quantity of the water outlet and the water inlet
It is identical, so that the cooling water entered from a water inlet is correspondingly from the water outlet stream adjacent with the water inlet
Out, so that after entering the Water cooling type jet pipe per cooling water all the way, make the cooling of jet pipe more evenly, and every road cooling water exists
It is flowed out after quickly taking away heat after cooling-water duct circulation from nearest water outlet, improves cooling efficiency.
In the present invention, be staggered multiple water inlets and more in the circumferential direction along the shell of the water-cooled jet pipe
A water outlet, forms multiple cooling water channels in the circumferential, improves cooling water flow and further ensures entire water
The uniform cooling of cold type jet pipe circumferential direction, the inner casing of the entire jet pipe is available effectively to be cooled down, slower there is no flowing
Dead water region, and every road cooling water is quickly taken away after heat after cooling-water duct circulation and is flowed out from nearest water outlet,
Improve cooling efficiency.
According to some preferred embodiments, there are three water inlet and three water outlets for setting on the shell 2, for example,
As shown in Figure 3.
According to some preferred embodiments, the water holding jacket 3 is parallel with the inner casing 1 close to the side of the inner casing 1
Setting, so that the gap between the water holding jacket 3 and the inner casing 1 is wide.In the present invention, when the water holding jacket 3 with it is described
When gap between inner casing 1 is wide, the flowing of cooling water in this gap can be made more uniform.
According to some preferred embodiments, when the type face of the inner casing 1 can be for example common receipts as shown in Figure 1
When the type face of shrinking structure, for the water holding jacket 3 in order to match with the inner casing, one end of the water holding jacket 3 for example can be corresponding
Ground is inclined to set relative to axial direction, referring to figure 1 and figure 2.
According to some preferred embodiments, the wall thickness of the inner casing 1 is 3~5mm (3,3.5,4,4.5 or 5mm)；With/
Or a plurality of circumferentially spaced reinforcing rib 8 along the inner casing 1 is additionally provided on the periphery of the inner casing 1.In the present invention, excellent
The a plurality of reinforcing rib 8 is selected as to be evenly spaced in the circumferential direction of the inner casing 1, for example, as shown in Figure 4 and Figure 5, it is described to add
Strengthening tendons 8 stretch to the other end of the inner casing 1 from one end of the inner casing 1, i.e., in the present invention, it is preferred to be 8 edge of reinforcing rib
The length direction of the inner casing 1 extends.
In the present invention, being provided at circumferentially spaced along the inner casing 1 of a plurality of reinforcing rib 8, it is ensured that the water
Cold type jet pipe is able to bear higher cooling water pressure while using cooling heat transfer water, while guaranteeing do not have in the inner casing 1
There is the position of setting reinforcing rib 8, can be passed through with Cooling Water, forms the water channel of Cooling Water circulation.In the present invention, described to add
The setting of strengthening tendons 8 can be further ensured that the security and stability of the water-cooled jet pipe self structure especially works as the inner casing 1
Wall thickness can guarantee the security and stability of the water-cooled jet pipe self structure when smaller well, to be further ensured that this
Water-cooled jet pipe in invention after being passed through high-pressure cooling water, can under the very high state of gas flow temperature long-time stable work
Make.
According to some preferred embodiments, the width in the gap between the water holding jacket 3 and the inner casing 1 is equal to setting
The height of reinforcing rib 8 on the inner casing 1.
According to some preferred embodiments, the reinforcing rib 8 is in contact with the inner wall of the water holding jacket 3, makes per adjacent
Two reinforcing ribs 8 between form the independent flow passage that passes through of a Cooling Water, in this way, between water holding jacket and shell
Gap enter cooling water flow to the gap between water holding jacket and inner casing after, cooling water can be along corresponding independent flow passage stream
It is dynamic, so that string water phenomenon will not occur for the cooling water in each independent flow passage.In the present invention, the water holding jacket 3 is for example
It can be in contact by way of mechanical engagement with the reinforcing rib 8.
It should be noted that the changes of section of inner casing in order to clearly demonstrate, illustrated in Fig. 4 using the half-sectional technique of painting,
Have no effect on the corresponding relationship of Fig. 5 and Fig. 4.
According to some preferred embodiments, the width in the gap between the water holding jacket 3 and the shell 2 is 3~5mm
(3,3.5,4,4.5 or 5mm).
According to some preferred embodiments, the inner casing 1 and/or the water holding jacket 3 are made of red copper material.At this
In invention, the preferably described inner casing 1 and/or the water holding jacket 3 are made of the red copper material of high heat conductance, so can be very big
Improve heat transfer efficiency in ground.
According to some preferred embodiments, the shell 2 is made of stainless steel.
In the present invention, the inner casing 1 of the water-cooled jet pipe and shell 2 can for example use assembling structure, the shell 2
It can be for example sealed using sealing ring with the both ends of the inner casing 1 or directly by the shell 2 and the two of the inner casing 1
End welds together.
According to some preferred embodiments, the both ends of the shell 2 and the inner casing 1 are sealed by sealing ring.It is excellent
Selection of land, for example, as shown in Figure 1, the front end of the shell 2 and the inner casing 1 passes through the sealing of preceding sealing ring 9, the shell 2 and institute
The rear end for stating inner casing 1 is sealed by rear sealing ring 10.
According to some preferred embodiments, the shape of the water-cooled jet pipe is axial symmetry type.
It illustrates, in the present invention, when the shape of the water-cooled jet pipe is axial symmetry type, the water-cooled
Jet pipe is also denoted as water-cooled axisymmetric nozzle.In the present invention, it is preferred to the shape for the water-cooled jet pipe is axial symmetry type, this
It is since in practical applications, the structure of plasma generator is generally axial symmetry type, therefore is convenient for using axisymmetric nozzle
It transfers with plasma generator.
In the present invention, the type face of the inner casing of the water-cooled jet pipe for example can be as shown in Figure 1 and Figure 4 common
The type face of contraction structure, mainly for generation of subsonic gases jet stream；The type face example of the inner casing of water-cooled jet pipe of the present invention
Such as or the Rafael nozzle type face of converging diverging, for generating supersonic speed plasma jet.
Illustrate, in the present invention, term " inside ", " outside ", " left side (front side) ", " right side (rear side) ",
The orientation or positional relationship of the instructions such as " left end (front end) " and " right end (rear end) " is to be closed based on attached orientation shown in FIG. 1 or position
System, is merely for convenience of description of the present invention and simplification of the description, rather than indication or suggestion institute finger must have specific side
Position is constructed and operated in a specific orientation, therefore should not be understood as the limitation to invention；For those of ordinary skill in the art
For, visual concrete condition understands concrete meaning of the above-mentioned term in invention.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (10)
1. a kind of water-cooled jet pipe, it is characterised in that:
Including the inner casing, water holding jacket and shell being sequentially coaxially arranged from the inside to the outside；
Gap is all had between the water holding jacket and the inner casing and the shell, the gap forms cooling-water duct；
Be provided at least one water inlet and at least one water outlet on the shell, the water inlet and the water outlet with
The cooling-water duct connection；
Be provided with circumferential step between the water holding jacket and the shell, at least one described water inlet and it is described at least one go out
The mouth of a river is located at the two sides of the axial direction of the circumferential step, enters cooling water from least one described water inlet, and along institute
Cooling-water duct circulation is stated to flow out from least one described water outlet after a week.
2. water-cooled jet pipe according to claim 1, it is characterised in that:
The shell is equipped with multiple water inlets and multiple water outlets, multiple water inlets and multiple water outlets
Mouth being provided at circumferentially spaced along the shell, and in the shell between multiple water inlets and multiple water outlets
It is staggered in circumferential direction.
3. water-cooled jet pipe according to claim 2, it is characterised in that:
There are three water inlet and three water outlets for setting on the shell.
4. water-cooled jet pipe according to claim 1, it is characterised in that:
The water holding jacket is arranged in parallel close to the side of the inner casing with the inner casing so that the water holding jacket and the inner casing it
Between gap it is wide.
5. water-cooled jet pipe according to claim 1, it is characterised in that:
The wall thickness of the inner casing is 3~5mm；And/or
The a plurality of circumferentially spaced reinforcing rib along the inner casing is additionally provided on the periphery of the inner casing.
6. water-cooled jet pipe according to claim 5, it is characterised in that:
The reinforcing rib is in contact with the inner wall of the water holding jacket, makes to form a confession between per two adjacent reinforcing ribs
The independent flow passage that cooling water passes through.
7. water-cooled jet pipe according to any one of claims 1 to 6, it is characterised in that:
The width in the gap between the water holding jacket and the shell is 3~5mm.
8. water-cooled jet pipe according to any one of claims 1 to 6, it is characterised in that:
The inner casing and/or the water holding jacket are made of red copper material；And/or
The shell is made of stainless steel.
9. water-cooled jet pipe according to any one of claims 1 to 6, it is characterised in that:
The both ends of the shell and the inner casing are sealed by sealing ring.
10. water-cooled jet pipe according to any one of claims 1 to 6, it is characterised in that:
The shape of the water-cooled jet pipe is axial symmetry type.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811101783.7A CN109269756B (en) | 2018-09-20 | 2018-09-20 | A kind of water-cooled jet pipe |
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| CN201811101783.7A CN109269756B (en) | 2018-09-20 | 2018-09-20 | A kind of water-cooled jet pipe |
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| CN109269756A true CN109269756A (en) | 2019-01-25 |
| CN109269756B CN109269756B (en) | 2019-07-02 |
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| CN110933831A (en) * | 2019-12-02 | 2020-03-27 | 西安航天动力研究所 | Nozzle device for non-transfer type direct current plasma torch |
| CN111122103A (en) * | 2020-01-09 | 2020-05-08 | 中国空气动力研究与发展中心超高速空气动力研究所 | Wind tunnel heating section shell and end face cooling structure of inner shell free end thereof |
| CN111263480A (en) * | 2020-01-19 | 2020-06-09 | 中国空气动力研究与发展中心超高速空气动力研究所 | Low burning loss electrode of electric arc heater |
| CN112798305A (en) * | 2020-12-21 | 2021-05-14 | 中国空气动力研究与发展中心超高速空气动力研究所 | Water-cooled rectangular spray pipe |
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| DE102013011001A1 (en) * | 2013-04-22 | 2014-10-23 | Airbus Defence and Space GmbH | Production of ice particles with predetermined density |
| 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 |
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| CN110933831A (en) * | 2019-12-02 | 2020-03-27 | 西安航天动力研究所 | Nozzle device for non-transfer type direct current plasma torch |
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| CN112798305A (en) * | 2020-12-21 | 2021-05-14 | 中国空气动力研究与发展中心超高速空气动力研究所 | Water-cooled rectangular spray pipe |
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