CN115683519A - Bird bomb testing device and bird bomb testing method - Google Patents
Bird bomb testing device and bird bomb testing method Download PDFInfo
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- CN115683519A CN115683519A CN202110835361.8A CN202110835361A CN115683519A CN 115683519 A CN115683519 A CN 115683519A CN 202110835361 A CN202110835361 A CN 202110835361A CN 115683519 A CN115683519 A CN 115683519A
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Abstract
The invention discloses a bird impact test device and a bird impact test method. The bird strike test device comprises a vacuum bin, a fan test piece, a bird bullet launching device, a gas circuit on-off valve and a controller. The fan test piece sets up in the vacuum chamber and includes the pivot and a plurality of blades that set up along the circumference of pivot, and the pivot rotationally sets up in order to drive a plurality of blade rotations around its axis. The bird bullet launching device comprises a high-pressure gas bottle, a gun barrel and bird bullets, wherein the first end of the gun barrel is connected with the high-pressure gas bottle, the second end of the gun barrel is connected with the vacuum bin, and the bird bullets leave the gun barrel under the impact of the high-pressure gas and strike preset target blades in the blades. The gas path on-off valve is arranged between the high-pressure gas bottle and the first end of the gun barrel, and the controller is configured to control the opening time of the gas path on-off valve according to the actual angle position of the preset target blade on the fan test piece so as to enable the bird to shoot the preset target blade. The bird strike test device provided by the invention can be used for accurately striking the preset target blade.
Description
Technical Field
The invention relates to a bird bomb testing device and a bird bomb testing method.
Background
Bird strike testing of aircraft engines is an aircraft engine performance test that must be performed under airworthiness provisions. When the engine is in the airworthiness for obtaining evidence, strict test verification is carried out to meet the requirement of airworthiness clauses, wherein clauses indicate that the impact point position of the bird bomb is fully considered when a bird impact verification test is carried out. Therefore, for bird strike tests, the test technology for perfecting the accurate striking test piece designated position of the bird bomb is a key problem in the process of developing the civil aircraft engine.
At present, bird strike tests at home and abroad are carried out, and related test devices and test methods are designed for bird strikes of the whole aircraft, and the problem of test repeatability in the high-speed rotation process of an aircraft engine is not considered or the accurate strike requirement of a high-speed rotation test piece is difficult to achieve.
In some related technologies known to the inventor, the bird and bullet testing device can only accurately strike a stationary aircraft complete machine, and for blades with high-speed rotation, it is not ensured that accurate striking is performed on a required striking point, and repeatability of the test is ensured.
It is important to note here that the statements in this background section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
Disclosure of Invention
The invention provides a bird bomb testing device and a bird bomb testing method, which are used for accurately controlling a bird bomb striking point of a bird bomb impact test.
The first aspect of the present invention provides a bird strike test apparatus, including:
a vacuum bin;
the fan test piece is arranged in the vacuum bin and comprises a rotating shaft and a plurality of blades arranged along the circumferential direction of the rotating shaft, and the rotating shaft is rotatably arranged around the axis of the rotating shaft so as to drive the blades to rotate;
the bird bullet launching device comprises a high-pressure gas bottle, a barrel and bird bullets arranged in the barrel, wherein the first end of the barrel is connected with the high-pressure gas bottle, the second end of the barrel is connected with the vacuum bin, and the bird bullets are arranged in the barrel to leave the barrel under the impact of the high-pressure gas and strike preset target blades in the blades;
the device comprises a gas path on-off valve and a controller, wherein the gas path on-off valve is arranged between a high-pressure gas bottle and a first end of a gun barrel to control the on-off of a gas path between the high-pressure gas bottle and the gun barrel, the controller is configured to transmit an opening signal to the gas path on-off valve to enable the high-pressure gas to impact a bird bomb, and the controller is further configured to control the transmitting time of the opening signal according to the actual angle position of a preset target blade on a fan test piece to enable the bird bomb to hit the preset target blade.
In some embodiments, the controller is configured to calculate a target angular position of the preset target blade when the controller transmits the start signal according to an initial angular position of the preset target blade and an angle by which the fan test piece rotates during the period from the transmission of the start signal from the controller to the striking of the bird strike to the fan test piece, and transmit the start signal when an actual angular position of the preset target blade is the target angular position.
In some embodiments, the angle through which the fan test piece rotates from the time the controller transmits the start signal to the time the bird shell strikes the fan test piece is calculated from the time it takes the controller to transmit the start signal to the time the bird shell strikes the fan test piece and the rotational speed of the fan test piece.
In some embodiments, the time taken from the firing of the opening signal from the controller to the process of the bird shell striking to the fan test piece includes a first time required from the firing of the opening signal to the opening of a valve of the air passage cut-off valve, a second time required for the bird shell to fly through the barrel, and a third time required for the bird shell to strike from the second end of the barrel to the fan test piece.
In some embodiments, the error in the angle at which the bird strike the predetermined target blade is less than the value of the angle covered by each of the plurality of blades.
In some embodiments, the number of the plurality of blades is equal to or less than 18.
In some embodiments, the controller is configured to calculate an initial angular position of the preset target blade according to the number of the preset target blade.
The invention provides a bird impact test method based on the bird impact test device, which comprises the following steps:
determining one of the plurality of blades as a preset target blade and calculating an initial angle position of the preset target blade on the fan test piece;
acquiring the rotating angle of the fan test piece in the process from the transmission of a starting signal from a controller to the striking of a bird bomb to the fan test piece;
calculating a target angle position of a preset target blade when a signal is transmitted according to the initial angle position and the rotating angle of the fan test piece; and
and detecting the actual angle position of the preset target blade in real time, and when the actual angle position of the preset target blade is the target angle position, transmitting an opening signal by the controller.
Based on the aspects provided by the invention, the bird strike test device comprises a vacuum bin, a fan test piece, a bird projectile launching device, a gas path on-off valve and a controller. The fan test piece sets up in the vacuum chamber and includes the pivot and a plurality of blades that set up along the circumference of pivot, and the pivot is rotationally set up around its axis in order to drive a plurality of blades and rotate. The bird bullet launching device comprises a high-pressure gas bottle, a gun barrel and bird bullets arranged in the gun barrel, wherein the first end of the gun barrel is connected with the high-pressure gas bottle, the second end of the gun barrel is connected with the vacuum bin, and the bird bullets are arranged in the gun barrel to leave the gun barrel under the impact of the high-pressure gas and strike preset target blades in the blades. The air path on-off valve is arranged between the high-pressure gas bottle and the first end of the gun barrel to control the on-off of an air path between the high-pressure gas bottle and the gun barrel, and the controller is configured to control the opening time of the air path on-off valve according to the actual angle position of the preset target blade on the fan test piece so that the bird strikes the preset target blade. The testing device of the invention prejudges the target angle position of the preset target blade, and transmits the starting signal when the actual angle position of the preset target blade on the fan testing piece is the target angle position, thereby realizing the accurate hitting of the preset target blade.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a schematic structural diagram of a bird bomb testing device according to an embodiment of the invention.
Fig. 2 is a schematic structural view of the fan test piece in fig. 1.
FIG. 3 is a schematic diagram of a fan test piece when a controller transmits an on signal.
Fig. 4 is a control flow diagram of the bird bullet testing method according to the embodiment of the present invention.
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. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. 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 relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
For ease of description, spatially relative terms such as "over 8230 \ 8230;,"' over 8230;, \8230; upper surface "," above ", etc. may be used herein to describe the spatial relationship of one device or feature to another device or feature as shown in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary terms "at 8230; \8230; above" may include both orientations "at 8230; \8230; above" and "at 8230; \8230; below". The device may be otherwise variously positioned and the spatially relative descriptors used herein interpreted accordingly.
The bird strike test device provided by the embodiment of the invention pre-judges the angle position of the preset target blade when the strike signal is transmitted by accurately calculating the time required from the transmission of the starting signal to the striking of the bird bomb to the preset target blade, and further transmits the strike signal in advance when the preset target blade does not reach the strike point, so that the strike point of the bird bomb strike fan test piece is accurately controlled.
Referring to fig. 1-3, in some embodiments, a bird strike test apparatus includes a vacuum chamber 5, a fan test piece 4, a bird projectile launching device, a gas circuit on-off valve 7, and a controller 6.
The fan test piece 4 is arranged in the vacuum chamber 5 and includes a rotating shaft and a plurality of blades 41 arranged along the circumference of the rotating shaft, and the rotating shaft is rotatably arranged around the axis thereof to drive the plurality of blades 41 to rotate. The bird bullet launching device comprises a high-pressure gas bottle 1, a gun barrel 2 and a bird bullet 3 arranged in the gun barrel 2, wherein the first end of the gun barrel 2 is connected with the high-pressure gas bottle 1, the second end of the gun barrel 2 is connected with a vacuum bin 5, and the bird bullet 3 is arranged in the gun barrel 2 to leave the gun barrel 2 under the impact of high-pressure gas and strike a preset target blade in a plurality of blades. The air path on-off valve 7 is arranged between the high-pressure gas bottle 1 and the first end of the gun barrel 2 to control the on-off of an air path between the high-pressure gas bottle 1 and the gun barrel 2, and the controller 6 is configured to control the opening time of the air path on-off valve 7 according to the actual angle position of the preset target blade on the fan test piece 4 so that the bird bomb 3 hits the preset target blade.
The starting signal is transmitted from the controller 6 to start the air path on-off valve 7 to actually hit the preset target blade by the bird bomb 3, the fan test piece 4 can continuously rotate, therefore, if the preset target blade is hit accurately, the target angle position of the preset target blade needs to be pre-judged, and when the actual angle position of the preset target blade on the fan test piece 4 is the target angle position, the starting signal is transmitted, so that the preset target blade is hit accurately.
Specifically, referring to fig. 2, when the fan trial 4 is at rest and not rotating, the bird strike point a is located on the blade at an angle of zero. The fan test piece 4 of this embodiment continuously rotates around its pivot, sets up the nth blade 41 of fan test piece 4 as presetting the target blade, so in order to make the accurate target blade that should predetermine of hitting of bird bomb, need be when the bird bomb reaches fan test piece 4, should predetermine the target blade and just rotate to this position too to make bird bomb strike point a just be located and predetermine the target blade.
In some embodiments, the controller 6 is configured to calculate the angular position of the preset target blade at the time the controller transmits the turn-on signal based on the initial angular position of the preset target blade and the angle the fan trial rotates during the time the controller transmits the turn-on signal from the transmission of the turn-on signal from the controller 6 to the time the bird's bullet strikes the fan trial.
Referring to fig. 2, an initial angular position of a target blade is preset
The rotating angle of the fan test piece is beta in the process from the transmission of the starting signal from the controller 6 to the striking of the bird bomb to the fan test piece, and then the target angle position of the target blade is preset when the controller transmits the starting signal
In some embodiments, the angle β the fan test piece rotates during the period from the transmission of the on signal from the controller 6 to the striking of the bird bomb to the fan test piece is obtained by the time taken for the period from the transmission of the on signal from the controller 6 to the striking of the bird bomb to the fan test piece and the rotation speed of the fan test piece. Specifically, β = T · ω.
Specifically, the time T taken from the transmission of the opening signal from the controller 6 to the process of the bird's bullet striking to the fan test piece includes the first time T required from the transmission of the opening signal to the valve opening of the gas passage on-off valve open A second time T required for the bird projectile to fly through the barrel AB And a third time T from the second end of the gun barrel to the impact of the bird bomb on the fan test piece BC . That is to say T = T open +T AB +T BC . In particular, a first time T required from the emission of an opening signal to the opening of the valve of the gas circuit on-off valve open Refers to the time from when the opening signal is sent to when the battery of the gas circuit breaker is opened.
In some embodiments, the error in the angle at which the bird strike the predetermined target blade is less than the value of the angle covered by each of the plurality of blades. The value of the angle covered by each blade here refers to the angle of 360 divided by the number of blades, and not the value covered by a solid portion of each blade.
In some embodiments, the number of the plurality of blades is equal to or less than 18.
In some embodiments, the controller is configured to calculate an initial angular position of the preset target blade according to the number of the preset target blade. That is, when installed, the zero vane is installed at an angle of zero. E.g. initial angular position of the Nth blade
Where N is the number of the blade.
The embodiment of the invention also provides a bird strike test method of the bird strike test device, which comprises the following steps:
determining one of the plurality of blades as a preset target blade and calculating an initial angle position of the preset target blade on the fan test piece;
acquiring the rotating angle of the fan test piece in the process from the transmission of a starting signal from a controller to the striking of a bird bomb to the fan test piece;
calculating a target angle position of a preset target blade when a signal is transmitted according to the initial angle position and the rotating angle of the fan test piece; and
the angle position of the preset target blade is detected in real time, and when the preset target blade reaches the target angle position, the controller transmits an opening signal.
According to the bird strike test method, the target angle position of the fan test piece is calculated and prejudged, the controller transmits the starting signal when the preset target blade reaches the target angle position, and therefore accurate striking on the preset target blade is achieved. Accurate blows to a pre-set target blade may facilitate repeated testing of multiple blades.
Specifically, the angle position of the preset target blade is detected in real time, and the angle position of the preset target blade can be directly detected in real time by directly utilizing the sensor. The angular position of the whole fan test piece can be detected to convert the angular position of the preset target blade, for example, the angular position of the fan test piece can be detected by using the zeroth blade as a reference, and then the angular position of the preset target blade can be obtained.
The structure and operation of the bird strike testing device for an aircraft engine according to one embodiment of the present invention will be described in detail with reference to fig. 1 to 4.
As shown in fig. 1, in this embodiment, the bird strike test device for the aircraft engine includes a high-pressure gas cylinder 1, a barrel 2, a bird bomb 3, a fan test piece 4, a vacuum chamber 5, a controller 6, a gas circuit on-off valve 7, a bird bomb tray 8, a first pressure sensor 9, a first temperature sensor 14, a second pressure sensor 11, a second temperature sensor 10, a third pressure sensor 13, a third temperature sensor 12, and a laser velocimeter 15.
Wherein high-pressure air is stored in the high-pressure gas cylinder 1. The barrel 2 is used for accelerating the bird shells 3 therein. The bird bomb 3 is used to simulate a real bird. The fan test piece 4 includes a plurality of blades. The vacuum chamber 5 is used for simulating an aircraft engine bird strike test environment. The first pressure sensor 9 is used for detecting the air pressure in the high-pressure air bottle 1 and feeding back the air pressure to the controller 6, the first temperature sensor 14 is used for detecting the air temperature in the high-pressure air bottle 1 and feeding back the air temperature to the controller 6, the second pressure sensor 11 is used for detecting the air pressure in the gun barrel 2 and feeding back the air pressure to the controller 6, the second temperature sensor 10 is used for detecting the temperature in the gun barrel 2 and feeding back the air temperature to the controller 6, the third pressure sensor 13 is used for detecting the pressure in the vacuum chamber 5 and feeding back the air pressure to the controller 6, the third temperature sensor 12 is used for detecting the temperature in the vacuum chamber 5 and feeding back the air temperature to the controller 6, the laser velocimeter 5 is used for detecting the speed of the bird bomb and feeding back to the controller 6, and further, the bird strike test device further comprises a rotating speed sensor used for detecting the rotating speed of the fan test piece and an angle sensor used for detecting the rotating angle of the fan test piece, and the controller 6 is used for receiving signals of the pressure sensors, the temperature sensor and the laser velocimeter and signals of the rotating speed sensor and the angle sensor and sending a control instruction according to the signals.
The air passage on-off valve 7 is a quick-opening and closing electromagnetic valve, and when the valve is opened, the bird bomb flies through the gun barrel under the action of high-pressure air to strike the fan test piece.
The bird bullet support 8 is used for loading the bird bullets 3 and accelerating the bird bullets in the gun barrel 2, the accelerated bird bullets leave the gun barrel and then move forward at an approximately constant speed, and finally strike the rotating fan test piece 4.
As shown in fig. 2, the fan test piece 4 includes 18 fan blades, and the target blade is the nth blade, so that the blade corresponds to the initial angular position
Fig. 3 shows the state of the fan test piece when the controller transmits an on signal, as shown in fig. 1, a is located at the beginning of the barrel, B is located at the end of the barrel, and C is located at the striking point of the fan test piece. Since the fan test piece is in a high-speed rotation state, it is necessary to consider the time T from the emission of the opening signal to the opening of the battery valve open Time T of bird projectile flying through barrel AB And the time T from the bird projectile to the impact test piece BC . And the angle that the test piece rotates during this time is omega. Thus, for precise strike of a bird shot at a predetermined Nth fan blade, i.e. phase
The corresponding test piece angle information when the opening signal is sent out is theta =2 pi N/18- & omega.
Fig. 4 is a flowchart of the bird strike test method of the present embodiment, and the specific use method is as follows: according to the test requirements, the test temperature, the test pressure and the bird bomb mass are adjusted to be specified accurate values. The hitting point of the preset bird bomb is located on the Nth blade of the fan, and the angle information of the preset target blade when the bird bomb is launched is calculated to be theta =2 pi N/18- & omega. And (4) after the fan test piece is started, confirming that the test temperature, the test pressure and the bird bomb quality are all specified accurate numerical values again. And after the confirmation of no error, operating the bird and cannon to launch by an operator. And after receiving a bird gun transmitting signal of an operator, the controller judges the angle of a preset target blade of the fan test piece, and when the phase position is theta =2 pi N/18- & omega, a bird gun transmitting instruction is sent out, and the gas path on-off valve 7 is opened. The bird bomb is ejected to accurately strike the impact point corresponding to the preset Nth blade.
In order to ensure the repeatability of the test, the time error delta T of the battery switch of the air circuit on-off valve of the bird bomb test device open 0.1ms is ≦ 0.1ms. The testing device controls the speed of the bird gun flying out of the gun barrel opening to be v =130m/s (+ -1%), and L BC Is 1m, so that the time error delta T generated in the uniform speed flight segment BC <1/(130·(1-1％))-1/(130. (1 + 1%)) =0.15ms. The length L of the test device barrel AB 7m, the time error Delta T of the bird bomb staying in the gun barrel can be ensured by accurately controlling the test temperature, the air pressure and the bird bomb quality AB <0.45ms, so the total error in bird strike time of the test apparatus Δ T = Δ T open +ΔT AB +ΔT BC <0.6ms。
Meanwhile, the rotation speed measurement error delta omega of the test device is not less than +/-2 rpm not more than 4/60rps, the flight time T of the bird and cannon launched by the test device is less than 0.2s, and the rotation speed omega of the fan test piece is less than 4000rpm.
Based on the above data, the impact point phase error corresponding thereto is Δ β = Δ T · ω + T · Δ ω < 0.0006s · 4000/60rps · 360+0.2s · 4/60rps · 360=19.2 ° < 360/18=20 °. Namely, the angle error of the hitting point of the testing device is smaller than the angle value covered by one fan blade, so that the testing device can realize accurate bird strike test of fan testing pieces below 18 blades and 4000 revolutions, and further realize repeatable bird strike test. The test device of the embodiment of the invention ensures accurate strike of a bird strike test, so that the number of blades of a test piece can be greatly reduced in an actual test, and the test cost is greatly reduced.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (8)
1. A bird strike test device, comprising:
a vacuum chamber (5);
the fan test piece (4) is arranged in the vacuum bin (5) and comprises a rotating shaft and a plurality of blades (41) arranged along the circumferential direction of the rotating shaft, and the rotating shaft is rotatably arranged around the axis of the rotating shaft so as to drive the blades to rotate (41);
the bird bullet launching device comprises a high-pressure gas bottle (1), a barrel (2) and bird bullets (3) arranged in the barrel (2), wherein the first end of the barrel (2) is connected with the high-pressure gas bottle (1), the second end of the barrel (2) is connected with the vacuum bin (5), and the bird bullets (3) are arranged in the barrel (2) to leave the barrel (2) under the impact of high-pressure gas and strike preset target blades in the blades (41);
the device comprises a gas path on-off valve (7) and a controller (6), wherein the gas path on-off valve (7) is arranged between the high-pressure gas bottle (1) and the first end of the gun barrel (2) to control the on-off of a gas path between the high-pressure gas bottle (1) and the gun barrel (2), the controller (6) is configured to transmit an opening signal to the gas path on-off valve (7) to enable the high-pressure gas to impact the bird bomb (3), and the controller (6) is further configured to control the transmitting time of the opening signal according to the actual angle position of a preset target blade on the fan test piece (4) to enable the bird bomb (3) to hit the preset target blade.
2. The bird strike test device according to claim 1, wherein the controller (6) is configured to calculate a target angular position of the preset target blade when the controller transmits the turn-on signal, based on an initial angular position of the preset target blade and an angle through which the fan test piece (4) is rotated during a period from the transmission of the turn-on signal by the controller (6) to the striking of the bird strike to the fan test piece, the controller transmitting the turn-on signal when an actual angular position of the preset target blade is the target angular position.
3. The bird strike test device according to claim 2, characterized in that the angle through which the fan test piece (4) rotates from the time when the controller (6) transmits the turn-on signal to the time when the bird bomb strikes the fan test piece (4) is calculated from the time taken from the time when the controller (6) transmits the turn-on signal to the time when the bird bomb strikes the fan test piece (4) and the rotation speed of the fan test piece (4).
4. The bird strike test device according to claim 3, characterized in that the time taken from the transmission of an opening signal by the controller (6) to the process of the bird's bullet striking the fan test piece (4) includes a first time required from the transmission of an opening signal to the valve opening of the gas passage on-off valve (7), a second time required for the bird's bullet (3) to fly through the barrel (2), and a third time required for the bird's bullet (3) to strike the fan test piece (4) from the second end of the barrel (2).
5. The bird strike test device according to any one of claims 1 to 4, characterized in that the angular error at which the bird shot (3) strikes the predetermined target blade is smaller than the angular value covered by each of the plurality of blades (41).
6. The bird strike test device of claim 5, wherein the number of the plurality of blades is 18 or less.
7. The bird strike test device of claim 2, wherein the controller is configured to calculate an initial angular position of a preset target blade from a number of the preset target blade.
8. A bird strike test method based on the bird strike test apparatus of any one of claims 1 to 7, comprising the steps of:
determining one of a plurality of blades as a preset target blade and calculating an initial angle position of the preset target blade on the fan test piece;
acquiring the rotating angle of the fan test piece in the process from the transmission of a starting signal from the controller to the striking of the bird bomb to the fan test piece;
calculating a target angle position of the preset target blade when a signal is transmitted according to the initial angle position and the rotating angle of the fan test piece; and
and detecting the actual angle position of the preset target blade in real time, and when the actual angle position of the preset target blade is the target angle position, transmitting an opening signal by a controller.
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| CN202110835361.8A CN115683519A (en) | 2021-07-23 | 2021-07-23 | Bird bomb testing device and bird bomb testing method |
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| CN202110835361.8A CN115683519A (en) | 2021-07-23 | 2021-07-23 | Bird bomb testing device and bird bomb testing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117969001A (en) * | 2024-01-31 | 2024-05-03 | 重庆大学 | Bird strike test device and method for aero-engine part in rotating state |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117969001A (en) * | 2024-01-31 | 2024-05-03 | 重庆大学 | Bird strike test device and method for aero-engine part in rotating state |
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