CN116046855A - Device for measuring inertial separation of tiny liquid water drops in atmosphere - Google Patents
Device for measuring inertial separation of tiny liquid water drops in atmosphere Download PDFInfo
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- CN116046855A CN116046855A CN202211702050.5A CN202211702050A CN116046855A CN 116046855 A CN116046855 A CN 116046855A CN 202211702050 A CN202211702050 A CN 202211702050A CN 116046855 A CN116046855 A CN 116046855A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/14—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of an electrically-heated body in dependence upon change of temperature
- G01N27/18—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of an electrically-heated body in dependence upon change of temperature caused by changes in the thermal conductivity of a surrounding material to be tested
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The invention belongs to icing condition detection technology, and particularly relates to an inertial separation measuring device for tiny liquid water drops in the atmosphere. The device comprises an upper half air passage, a lower half air passage, a flange plate, a mast, a first platinum resistor and a second platinum resistor; the upper half air passage and the lower half air passage are welded into a whole, an incoming flow air passage is reserved in the middle, the incoming flow air passage is respectively connected with a first air outlet and a second air outlet, a first platinum resistor is arranged in front of the first air outlet and the second air outlet, the second platinum resistor is arranged behind the second air outlet, and the first platinum resistor and the second platinum resistor are fixedly welded on the flange after respectively extending into the positions through reserved holes on the flange; in order to ensure that the device can be used continuously on board an aircraft, the mast section adopts a fusiform profile to reduce wind resistance. Meanwhile, considering the situation that the ice accumulation of the device possibly occurs in the actual flying process to influence the use, the heating wire is buried on the surface of the device and is used for preventing/removing ice of the device.
Description
Technical Field
The invention belongs to icing condition detection technology, and particularly relates to an inertial separation measuring device for tiny liquid water drops in the atmosphere.
Background
In the field of aeronautics, icing flight conditions exist in which an aircraft needs to detect icing and activate an icing-control device to avoid dangerous occurrences. However, there is a time delay from the start of icing of the aircraft to the detection of icing by the detector, and it is difficult to set the icing detector at a partially off position. Therefore, the atmospheric data can be measured, and whether icing conditions exist in the current environment or not can be predicted by integrating various data, so that icing can be predicted in advance to start icing protection.
A Liquid Water Content (LWC) sensor is one of the atmospheric data sensors for measuring the liquid water content in the atmosphere. Conventional hot wire LWC sensors typically require dry air calibration prior to measurement. Normal use conditions on an aircraft cannot be calibrated, so a convenient and reliable LWC measurement mode is needed.
The inertial separation technology is generally applied to gas-liquid separators in industrial production, and the technology utilizes the principle of different gas-liquid inertias to enable liquid drop-containing gas to pass through a separation device at high speed, so that dry gas can be effectively obtained.
Disclosure of Invention
The purpose of the invention is that: the inertial separation measuring device is light in weight, small in size and free from calibration.
In addition, the invention also comprises an inertial separation measurement device manufactured by the structure.
Technical proposal
An inertial separation measuring device for tiny liquid water drops in the atmosphere comprises an upper half air passage 2, a lower half air passage 3, a flange 4, a mast 5, a first platinum resistor and a second platinum resistor; the upper half air passage 2 and the lower half air passage 3 are welded into a whole, an incoming flow air passage is reserved in the middle, the incoming flow air passage is respectively connected with a first air outlet and a second air outlet, a first platinum resistor is arranged in front of the first air outlet and the second air outlet, the second platinum resistor is arranged behind the second air outlet, and the first platinum resistor and the second platinum resistor respectively extend into the positions through reserved holes in the flange 4 and are fixedly welded on the flange 4;
be provided with the dog on the first air flue 2, the dog is used for cooperating the inflow air passageway to guide the inflow air to collect the tiny water droplet of liquid in the inflow air, make the tiny water droplet of liquid assemble in dog edge, finally discharge through first gas outlet, the dry air current after the separation gets into mast 5 one side through the second gas outlet, mast 5 is the cavity that has the streamline appearance, and mast 5 opposite side and ring flange 4 welding are as an organic whole.
Further, the incoming air channel is specifically divided into an air inlet section and a separation section;
the first platinum resistor and the second platinum resistor are specifically armoured platinum resistors with hard shells; the two platinum resistors are arranged in front and back, the model and the specification are identical, and the most sensitive measuring effect is achieved when the model is preferably BAE46 according to the test result;
the first platinum resistor is preferably arranged near the inlet of the incoming air channel; in detail, the first platinum resistor is positioned on the air inlet section and on the axis of the inertial separation measuring device;
the lower half air passage 3 is provided with air holes, the air holes are tangential planes perpendicular to the curved surface position where the round small holes are positioned, the number of the air holes is a plurality of the air holes and are arranged in a square matrix, the width of the array is the width of a channel where the array is positioned, and the coverage range of the length direction is from the middle part of the air inlet section to the whole separating section;
the vent holes can blow away liquid tiny water drops attached to the lower half air passage 3;
the aperture of the vent hole is not less than 0.5mm and not more than 1/8 of the width of the channel so as to ensure that the vent hole can be uniformly distributed in the corresponding area on the lower half air channel 3;
the air inlet section is in a slant square cone structure, and gradually reduces from outside to inside, so that air inflow in a larger range can be collected conveniently;
on the separation section, a stop block is arranged on the upper half air passage 2, the lower half air passage 3 is of an arc structure, and a channel formed by combination is used for guiding airflow to flow;
the streamline appearance is in particular a shuttle shape, so that the streamline has a good aerodynamic appearance, and is beneficial to reducing air resistance and preventing vortex generation;
the air inlet opening position is slightly ahead of the front edge line position of the mast, and the function of the air inlet opening position is to prevent air flow entering the incoming air channel from being disturbed by the appearance of the device;
a winding heating wire groove is arranged on the mast, wherein the winding heating wire groove is used for installing heating wires;
the heating wire groove is communicated with the upper half air passage 2, the lower half air passage 3 and the mast 5, is buried in the groove after being bent by one heating wire, and is finally welded and sealed;
the heating wire is made of a flexible resistance wire, a middle insulating layer and a metal shell, and can heat the upper half air passage 2, the lower half air passage 3 and the mast 5 to achieve the anti-icing/deicing effect;
the inertial separation measuring device is preferably made of red copper, and passivation treatment is carried out on the surface of the inertial separation measuring device, so that corrosion of environments such as acid rain, salt fog and the like can be prevented.
Technical effects
The inertial separation measuring device utilizes the characteristics of small gas inertia and large liquid micro water drop inertia in incoming air, and designs a bent air path and a stop block in an incoming air channel to force the air flow direction to change rapidly in the channel, so as to achieve the aim of separating dry and wet air. Meanwhile, two identical platinum resistors are respectively arranged near the air inlet and behind the second air outlet of the incoming air channel. The air flows of the positions where the two platinum resistors are positioned are respectively air before separation and dry air after separation, and the difference of the dry air flow and the wet air flow is represented by the difference of the measured values of the two platinum resistors, namely the liquid water content in the incoming air. In order to ensure that the device can be used continuously on board an aircraft, the mast section adopts a fusiform profile to reduce wind resistance. Meanwhile, considering the situation that the ice accumulation of the device possibly occurs in the actual flying process to influence the use, the heating wire is buried on the surface of the device and is used for preventing/removing ice of the device.
The inertial separation measuring device can continuously detect the liquid water content in the air in real time, has the advantages of exquisite structure, small volume and light weight, and can effectively save space cost and weight cost when being arranged on an aircraft.
Drawings
FIG. 1 is a cross-sectional view of an inertial separation measurement unit of the present invention;
FIG. 2 is a side view of an inertial separation measurement unit according to the present invention;
FIG. 3 is a perspective view of an inertial separation measurement unit of the present invention;
fig. 4 is a front view of the inertial separation measurement unit of the present invention.
Detailed Description
The invention is further described below with reference to examples. The following description is of some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention is described in further detail below with reference to the attached drawing figures:
as shown in fig. 1, the inertial separation measuring unit 1 has an upper half air passage 2, a lower half air passage 3, a flange 4, a mast 5, four main parts, and platinum resistors provided at positions 6 and 7, respectively.
The upper half air passage 2 and the lower half air passage 3 are welded to form an air inlet passage assembly.
The mast 5 is welded to the flange 4 vertically.
The air inlet assembly and the mast 5 are positioned and welded and fixed through the clamping grooves.
The platinum resistances with the same specifications can be measured by installing two types at the position 6 and the position 7.
The device for measuring inertial separation of tiny liquid water drops in the atmosphere comprises an upper half air passage 2, a lower half air passage 3, a flange 4, a mast 5, a first platinum resistor and a second platinum resistor; the upper half air passage 2 and the lower half air passage 3 are welded into a whole, an incoming flow air passage is reserved in the middle, the incoming flow air passage is respectively connected with a first air outlet and a second air outlet, a first platinum resistor is arranged in front of the first air outlet and the second air outlet, the second platinum resistor is arranged behind the second air outlet, and the first platinum resistor and the second platinum resistor respectively extend into the positions through reserved holes in the flange 4 and are fixedly welded on the flange 4;
be provided with the dog on the first air flue 2, the dog is used for cooperating the inflow air passageway to guide the inflow air to collect the tiny water droplet of liquid in the inflow air, make the tiny water droplet of liquid assemble in dog edge, finally discharge through first gas outlet, the dry air current after the separation gets into mast 5 one side through the second gas outlet, mast 5 is the cavity that has the streamline appearance, and mast 5 opposite side and ring flange 4 welding are as an organic whole. The incoming flow air channel is specifically divided into an air inlet section and a separation section; the first platinum resistor and the second platinum resistor are specifically armoured platinum resistors with hard shells; the two platinum resistors are arranged in front and back, the model and the specification are identical, and the most sensitive measuring effect is achieved when the model is preferably BAE46 according to the test result; the first platinum resistor is preferably arranged near the inlet of the incoming air channel; in detail, the first platinum resistor is positioned on the air inlet section and on the axis of the inertial separation measuring device; the lower half air passage 3 is provided with air holes, the air holes are tangential planes perpendicular to the curved surface position where the round small holes are positioned, the number of the air holes is a plurality of the air holes and are arranged in a square matrix, the width of the array is the width of a channel where the array is positioned, and the coverage range of the length direction is from the middle part of the air inlet section to the whole separating section; the vent holes can blow away liquid tiny water drops attached to the lower half air passage 3; the aperture of the vent hole is not less than 0.5mm and not more than 1/8 of the width of the channel so as to ensure that the vent hole can be uniformly distributed in the corresponding area on the lower half air channel 3; the air inlet section is in a slant square cone structure, and gradually reduces from outside to inside, so that air inflow in a larger range can be collected conveniently; on the separation section, a stop block is arranged on the upper half air passage 2, the lower half air passage 3 is of an arc structure, and a channel formed by combination is used for guiding airflow to flow; the streamline appearance is in particular a shuttle shape, so that the streamline has a good aerodynamic appearance, and is beneficial to reducing air resistance and preventing vortex generation; the air inlet opening position is slightly ahead of the front edge line position of the mast, and the function of the air inlet opening position is to prevent air flow entering the incoming air channel from being disturbed by the appearance of the device; a winding heating wire groove is arranged on the mast, wherein the winding heating wire groove is used for installing heating wires; the heating wire groove is communicated with the upper half air passage 2, the lower half air passage 3 and the mast 5, is buried in the groove after being bent by one heating wire, and is finally welded and sealed; the heating wire is made of a flexible resistance wire, a middle insulating layer and a metal shell, and can heat the upper half air passage 2, the lower half air passage 3 and the mast 5 to achieve the anti-icing/deicing effect; the inertial separation measuring device is preferably made of red copper, and passivation treatment is carried out on the surface of the inertial separation measuring device, so that corrosion of environments such as acid rain, salt fog and the like can be prevented.
Working process
The inertial separation measuring unit 1 is assembled in the above manner and mounted on the aircraft surface for measuring the liquid water content in the air, and the working process is as follows:
incoming air enters the device through the air inlet;
incoming air is first sensed by platinum resistance at location 6;
the air flow flows along the incoming air channel and reaches the separation section after passing through the air inlet section;
because the direction of the separation section channel changes, the airflow is forced to rapidly turn, and liquid tiny water drops in the incoming air cannot rapidly turn along with the airflow due to larger inertia in the turning process, so that the air can strike the upper half air channel 2;
the tiny water drops attached to the wall of the incoming air channel are collected to the stop block under the action of the air flow, and finally are discharged out of the device through the first air outlet;
air losing the liquid micro water drops, namely dry air, enters the mast 5 through the second air outlet and is further sensed by the platinum resistor at the position 7;
because the air flow water content at the two platinum resistors is different, the cooling capacity is also different (the liquid water evaporates to absorb heat additionally), the temperature of the two platinum resistors is reduced to different degrees, the voltage adjustment is carried out by a circuit by utilizing the temperature-resistance change characteristic of the platinum resistors, the transition from different liquid water contents to different platinum resistance temperatures to different platinum resistance values to different circuit voltages is finally realized, and the measurement can be completed by calibrating the voltage difference.
In summary, according to the device for measuring inertial separation of tiny liquid water drops, LWC can be measured in real time in the flight process by separating dry and wet air and measuring the difference of temperature reduction caused by the dry and wet air.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein. While the foregoing is directed to embodiments of the present invention, other and further details of the invention may be had by the present invention, it should be understood that the foregoing description is merely illustrative of the present invention and that no limitations are intended to the scope of the invention, except insofar as modifications, equivalents, improvements or modifications are within the spirit and principles of the invention.
Claims (10)
1. The device for measuring the inertial separation of tiny liquid water drops in the atmosphere is characterized by comprising an upper half air passage (2), a lower half air passage (3), a flange plate (4), a mast (5), a first platinum resistor and a second platinum resistor; the upper half air passage (2) and the lower half air passage (3) are welded into a whole, an incoming flow air passage is reserved in the middle, the incoming flow air passage is respectively connected with a first air outlet and a second air outlet, a first platinum resistor is arranged in front of the first air outlet and the second air outlet, the second platinum resistor is arranged at the second air outlet, and the first platinum resistor and the second platinum resistor are fixedly welded on the flange plate (4) after respectively extending into the positions through reserved holes on the flange plate (4);
be provided with the dog on the first air flue (2), the dog is used for cooperating the incoming flow air passageway to guide incoming flow air to collect the tiny water droplet of liquid in the incoming flow air, make the tiny water droplet of liquid assemble in dog edge, finally discharge through first gas outlet, the dry air current after the separation gets into mast (5) one side through the second gas outlet, mast (5) are the cavity that has the streamline appearance, and mast (5) opposite side and ring flange (4) welding are as an organic whole.
2. The inertial separation measurement unit for tiny liquid water drops in the atmosphere according to claim 1, wherein the incoming air channel is specifically divided into an air inlet section and a separation section;
the first platinum resistor and the second platinum resistor are specifically armoured platinum resistors with hard shells; the two platinum resistors are arranged in front and back, the model specifications are identical, and the model is preferably BAE 46.
3. An apparatus for inertial separation measurement of minute liquid droplets in the atmosphere according to claim 1, wherein said first platinum resistor is preferably disposed in the vicinity of the inlet of the incoming air channel; the first platinum resistor is positioned at the air inlet section and on the axis of the inertial separation measurement unit.
4. The device for inertial separation measurement of tiny liquid water drops in the atmosphere according to claim 1, wherein the lower half air passage (3) is provided with vent holes, the vent holes are tangential planes perpendicular to the curved surface position where the round small holes are positioned, the number of the vent holes is a plurality of the vent holes are arranged in a square array, the array width is the width of the passage where the array is positioned, and the coverage range of the length direction is from the middle part of the air inlet section to the whole separation section; the aperture of the vent hole is not less than 0.5mm and not more than 1/8 of the width of the channel, so as to ensure that the vent hole can be uniformly distributed in the corresponding area on the lower half air channel (3).
5. The device for inertial separation measurement of tiny liquid water drops in the atmosphere according to claim 2, wherein the air inlet section has a structure of a square inclined cone, and gradually reduces from outside to inside.
6. The inertial separation measuring device for tiny liquid water drops in the atmosphere according to claim 1, wherein a stop block is arranged on the upper half air passage (2) part of the separation section, the lower half air passage (3) part is of an arc structure, and a channel formed by combination is used for guiding airflow to flow.
7. A device for inertial separation of small liquid droplets in the atmosphere according to claim 3, characterized in that the streamline shape is embodied as a shuttle shape, which gives it a good aerodynamic shape, and the air inlet opening is located slightly before the mast front edge line, which acts to prevent the air flow into the incoming air channel from being disturbed by the device shape.
8. The inertial separation measuring device for tiny liquid water drops in the atmosphere according to claim 1, wherein a winding heating wire groove is arranged on the upper half air passage (2), the lower half air passage (3) and the mast (5) for installing heating wires; the heating wire groove is communicated with the upper half air passage (2), the lower half air passage (3) and the mast (5), and is buried in the groove after being bent by one heating wire, and finally is sealed in a welding way.
9. The device for inertial separation measurement of tiny liquid water drops in the atmosphere according to claim 8, wherein the heating wire is made of a flexible resistance wire, a middle insulating layer and a metal shell, and can heat three parts of the upper half air passage (2), the lower half air passage (3) and the mast (5) to achieve the effect of preventing/removing ice.
10. The inertial separation measuring device for tiny liquid water drops in the atmosphere according to claim 1, wherein the inertial separation measuring device is preferably made of red copper, and passivation treatment is carried out on the surface of the inertial separation measuring device, so that corrosion of acid rain and salt fog environments can be prevented.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211702050.5A CN116046855A (en) | 2022-12-29 | 2022-12-29 | Device for measuring inertial separation of tiny liquid water drops in atmosphere |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211702050.5A CN116046855A (en) | 2022-12-29 | 2022-12-29 | Device for measuring inertial separation of tiny liquid water drops in atmosphere |
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| Publication Number | Publication Date |
|---|---|
| CN116046855A true CN116046855A (en) | 2023-05-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211702050.5A Pending CN116046855A (en) | 2022-12-29 | 2022-12-29 | Device for measuring inertial separation of tiny liquid water drops in atmosphere |
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| CN (1) | CN116046855A (en) |
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- 2022-12-29 CN CN202211702050.5A patent/CN116046855A/en active Pending
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