Ice crystal field uniformity measuring device and measuring method

Abstract

A device and method for measuring the uniformity of an ice crystal field are disclosed, belonging to the field of ice crystal testing technology. This invention solves the problem of poor uniformity and stability of ice crystal fields in existing technologies. Key technical points include: calibrating the ice crystal field uniformity measuring device; placing the frame of the device against one side of the test area; using an external weighing sensor to measure the mass of the collection bags on both sides of the ice crystal nozzle being tested; and graphically calculating the effective coverage diameter of a single ice crystal nozzle. Based on the axial spacing of the nozzles, the width (X) of the ice crystal field test area, and the height (Y) of the test area, the nozzles are arranged to ensure proper ice crystal distribution in the test area. This invention is used to measure the effective coverage diameter and uniformity of ice crystals ejected from a single nozzle in the test area. The arrangement and spacing of the ice crystal nozzles can be adjusted according to their effective coverage diameter to improve the ice crystal field coverage area of ​​the test area.

Description

Technical Field

[0001] This invention relates to the field of ice crystal testing technology, specifically to an ice crystal field uniformity measuring device and method. Background Technology

[0002] Icing has always been a major issue affecting the flight safety of aircraft. The need to establish a uniform and stable ice crystal field to study the impact of icing on aircraft is becoming increasingly strong. However, how to measure whether the uniformity and other indicators of the established ice crystal field meet the experimental requirements has become a difficult problem.

[0003] Currently, commonly used equipment for measuring and testing ice crystal fields includes CCP, WCM, PIV, and PDI. These devices can simultaneously acquire multiple data points, measure particle sizes from 2 to 1550 μm, provide two-dimensional images of particles from 25 to 1550 μm, and measure liquid water content, temperature, and relative humidity from 0 to 3 g / m³, providing abundant data. Non-contact measurement avoids interference with the ice crystal field, allowing for the measurement of transient full-field two-dimensional or three-dimensional velocity distributions, facilitating the analysis of complex flow field structures. They possess high spatial resolution, and when paired with a high-resolution camera and adaptive optical system, can capture minute ice crystals or fine flow field structures. They can simultaneously measure particle size and velocity non-contactly, with a wide measurement range suitable for ice crystals or water droplets of different sizes. They offer high measurement accuracy, excel at handling broad particle size distributions, and are suitable for ice crystal research requiring accurate particle size spectra. Phase verification logic can filter out non-spherical particle signals, making them applicable to near-spherical ice crystal or droplet scenarios.

[0004] Because the measurement mechanisms of commonly used equipment for ice crystal field measurement and testing are mostly based on lasers or high-speed cameras, they have many limitations: each component relies on complex optical or thermal sensing technology, making them prone to inaccuracy when affected by contamination or icing; the optical path involves lasers, multiple optical elements, and high-speed cameras, making debugging and on-site maintenance cumbersome and susceptible to interference from environmental factors such as vibration and light; the measurable range is generally small, mostly measuring the concentration and uniformity of the ice crystal field in the lens area, with different probes having upper limits for concentration measurement, which can easily lead to overlap errors when exceeding the limits; the default measurement is for spherical particles, which can easily cause large errors when the ice crystals are irregularly shaped; and the effect on measuring the uniformity and stability of the entire ice crystal field is poor.

[0005] Therefore, there is an urgent need to propose a device and method for measuring the uniformity of ice crystal fields in order to solve the problem of poor uniformity and stability of ice crystal fields in the existing technology. Summary of the Invention

[0006] In view of the above facts, in order to solve the problem of poor uniformity and stability of ice crystal fields in the prior art, the present invention designs an ice crystal field uniformity measuring device and measuring method.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] Option 1: A device for measuring the uniformity of ice crystal field, comprising a frame, a steel wire rope, a collector, a collection bag, and clamps;

[0009] The collectors are arranged in an array grid along the vertical direction. The collectors are fixed inside the frame by steel wire ropes, and the collection bags are fitted on the outside of the collectors. The collection bags and collectors are fixed by clamps.

[0010] Furthermore: the frame, collector, and wire rope form a non-removable structure, while the collection bag and clamps are detachable structures.

[0011] Option 2: The ice crystal field uniformity measurement method described in Option 1 is implemented using the ice crystal field uniformity measurement device, specifically as follows:

[0012] Step 1: Arrange the collectors in rows a and columns b according to the width x of the bottom surface of the frame and the height y of the side surface of the frame in the ice crystal field uniformity measuring device.

[0013] Step 2: Calibrate the ice crystal field uniformity measuring device, with the nozzle being measured located on the central axis of the nth column of collectors;

[0014] Step 3: Place the frame side of the ice crystal field uniformity measuring device close to one side of the test section area, and use an external weighing sensor to measure the mass of the collection bags on both sides of the ice crystal nozzle being tested. The measured masses are m3 and m4, respectively. Record m3:m4=M, where M is the collection mass ratio of the collector.

[0015] Step 4: The ratio of the effective collection area of ​​the two collection bags on both sides of the ice crystal nozzle being tested and the ratio of the collection overlap area of ​​the two collection bags on both sides of the ice crystal nozzle being tested are equal to M. Draw a graph to solve for the effective coverage diameter of a single ice crystal nozzle being tested.

[0016] Step 5: Arrange the ice crystal nozzles to be tested according to the axial spacing of the nozzles to be tested, the width X of the test section area, and the height Y of the test section area to ensure the distribution of ice crystals in the test section area.

[0017] Furthermore: In step one, x = X - 10, y = Y - 10;

[0018] Where: x is the width of the bottom surface of the frame;

[0019] y represents the height of the side of the frame;

[0020] X represents the width of the test section area;

[0021] Y represents the height of the test section area.

[0022] Further: In step two, the ice crystal field uniformity measuring device is fixed in the test section area, and the mass m1 and m2 of the collection bags on both sides of the ice crystal nozzle under test are measured using an external weighing sensor. If the value of m1:m2 is between 0.85 and 1.15, then there is no problem with the structure and installation of the ice crystal field uniformity measuring device.

[0023] Further: In step four, the ratio of the overlapping areas of the collection bags on both sides of the ice crystal nozzle being tested is the ratio of the axial spacing of the ice crystal nozzle being tested.

[0024] Furthermore, the test section area is a cold environment, i.e., the temperature is below 0℃.

[0025] Furthermore: the two sides of the collection bag on both sides of the ice crystal nozzle being tested are the north and south sides.

[0026] The beneficial effects of this invention are as follows:

[0027] 1. This invention is used to measure the effective coverage diameter and uniformity of the ice crystal field of a single ice crystal nozzle in a test area. The arrangement and spacing of the ice crystal nozzles can be adjusted according to the effective coverage diameter of a single ice crystal nozzle to increase the coverage area of ​​the ice crystal field in the test area.

[0028] 2. This invention effectively improves the uniformity and stability of the ice crystal field, accurately reproduces extreme icing environments, ensures the effectiveness of the aircraft's anti-icing / de-icing system under real working conditions, and avoids safety hazards caused by discrepancies between the test scenario and reality.

[0029] 3. This invention can reduce data dispersion, making test results more repeatable and comparable, and providing a reliable basis for aircraft design optimization. Attached Figure Description

[0030] Figure 1 This is a front view of the present invention;

[0031] Figure 2 This is a side view of the present invention;

[0032] Figure 3 This is a top view of the present invention;

[0033] Figure 4 The left view shows the positional relationship between the nozzle being tested and the ice crystal field uniformity measuring device.

[0034] Figure 5 The front view shows the positional relationship between the ice crystal nozzle being tested and the ice crystal field uniformity measuring device.

[0035] Figure 6 This is a diagram showing the positional relationship between the ice crystal nozzle being tested and the ice crystal field uniformity measuring device in Example 4.

[0036] In the figure: 1-Frame bottom, 2-Frame side, 3-Wire rope, 4-Collector, 5-Collection bag, 6-Clamp, 7-External weighing sensor, 8-Test section area, 9-Tested ice crystal nozzle, 10-Ice crystal coverage area of ​​a single ice crystal nozzle in the test section area, d-Effective coverage diameter of a single tested ice crystal nozzle, h-Axial spacing of the tested ice crystal nozzle. Detailed Implementation

[0037] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0038] The terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0039] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0040] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0041] Example 1: An ice crystal field uniformity measuring device of this example includes a frame, a steel wire rope 3, a collector 4, a collection bag 5, and a clamp 6;

[0042] The collectors 4 are arranged in an array grid along the vertical direction. The collectors 4 are fixed in the frame by steel wire ropes 3. The collection bags 5 are fitted on the outside of the collectors 4. The clamps 6 fix the collection bags 5 and the collectors 4.

[0043] More specifically: the frame, collector 4, and wire rope 3 form a non-removable structure, while the collection bag 5 and clamp 6 are detachable structures.

[0044] Example 2: The ice crystal field uniformity measurement method described above is implemented based on the ice crystal field uniformity measurement device described in Example 1, specifically as follows:

[0045] Step 1: Based on the width x of the bottom surface 1 of the frame and the height y of the side surface 2 of the frame in the ice crystal field uniformity measuring device, arrange the collectors 4 in rows a and columns b.

[0046] Step 2: Calibrate the ice crystal field uniformity measuring device. The ice crystal nozzle 9 being measured is located on the central axis of the nth column collector 4.

[0047] Step 3: Place the frame side 2 of the ice crystal field uniformity measuring device close to one side of the test section area 8, and use the external weighing sensor 7 to measure the mass of the collection bags 5 on the north and south sides of the ice crystal nozzle 9 being tested. The measured masses are m3 and m4, respectively. Record m3:m4=M.

[0048] Step 4: The ratio of the effective collection area of ​​the two collection bags 5 on both sides of the ice crystal nozzle 9 being tested and the ratio of the collection overlap area of ​​the two collection bags 5 on both sides of the ice crystal nozzle 9 being tested are equal to M. Draw a graph to solve for the effective coverage diameter d of a single ice crystal nozzle 9 being tested.

[0049] Step 5: Based on the axial spacing h of the ice crystal nozzle 9 to be tested, the width X of the test section area 8, and the height Y of the test section area 8, arrange the ice crystal nozzle 9 to be tested to ensure the distribution of ice crystals in the test section area 8.

[0050] More specifically: in step one, x = X - 10, y = Y - 10;

[0051] Where: x is the width of the bottom surface 1 of the frame;

[0052] y is the height of the side of the frame (2).

[0053] X is the width of test section region 8;

[0054] Y represents the height of test section area 8.

[0055] More specifically: In step two, the ice crystal field uniformity measuring device is fixed in the test section area 8, and the mass m1 and m2 of the collection bags 5 on both sides of the ice crystal nozzle 9 are measured using an external weighing sensor 7. If the value of m1:m2 is between 0.85 and 1.15, then there is no problem with the structure and installation of the ice crystal field uniformity measuring device.

[0056] More specifically: In step four, the ratio of the overlapping areas of the collection bags 5 on both sides of the ice crystal nozzle 9 being tested is the ratio of the axial spacing h of the ice crystal nozzle 9 being tested.

[0057] More specifically: the test section area 8 is a cold environment, that is, the temperature is below 0℃.

[0058] More specifically: the two sides of the collection bag 5 on both sides of the ice crystal nozzle 9 being tested are the north and south sides.

[0059] More specifically: In step two, during the calibration of the ice crystal field uniformity measuring device, the test data are as follows:

[0060]

[0061] The conclusion is that the ice crystal mass ratio collected by the two collection bags 5 on both sides of the third row is 0.96-1.06, which is between 0.85-1.15. The calibration results are qualified, and there are no problems with the structure and installation of the ice crystal field uniformity measuring device.

[0062] More specifically: In step four, when the ice crystal field uniformity measuring device is located on the north wall of the test section area 8, and the position of the measured ice crystal nozzle 9 is located at the central axis of the third row of collection bags 5, the experimental data are as follows:

[0063]

[0064] Experimental results: The mass ratio of ice crystals collected by the two collection bags 5 on both sides of the third row is 0.38, that is, the effective collection area ratio of the two collection bags 5 is 0.38. Therefore, the effective coverage diameter 11 of a single tested ice crystal nozzle 9 is 330mm.

[0065] More specifically: In step five, when the ice crystal field uniformity measuring device is located at the center of the test section area 8, the position of the ice crystal nozzle 9 being measured is located at the central axis position of the third row of collection bags 5.

[0066]

[0067] The conclusion is that the central area of ​​ice crystal distribution in test section 8 is between 3 rows and 3 columns and 4 rows and 3 columns, and the distribution of ice crystal field decreases with the height and width of test section 8.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; as long as there is no structural conflict, the various features in the specific embodiments disclosed in this application can be combined with each other in any way, and will not cause the substance of the corresponding technical solutions to deviate from the scope of the technical solutions of the present invention.

[0069] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for measuring the uniformity of ice crystal fields, characterized in that, Includes frame, wire rope (3), collector (4), collection bag (5), clamp (6); The collector (4) is arranged in an array grid along the vertical direction. The collector (4) is fixed in the frame by steel wire rope (3). The collection bag (5) is fitted on the outside of the collector (4). The clamp (6) fixes the collection bag (5) and the collector (4). A method for measuring the uniformity of ice crystal fields, specifically: Step 1: Arrange a row and b column collectors (4) according to the width x of the bottom surface (1) and the height y of the side surface (2) of the frame in the ice crystal field uniformity measuring device. Step 2: Calibrate the ice crystal field uniformity measuring device. The ice crystal nozzle (9) to be measured is located on the central axis of the nth column collector (4); Step 3: Place the side (2) of the frame of the ice crystal field uniformity measuring device close to one side of the test section area (8), and use the external weighing sensor (7) to measure the mass of the collection bags (5) on both sides of the ice crystal nozzle (9) being tested. The measured masses are m3 and m4 respectively. Record m3:m4=M, where M is the collection mass ratio of the collector (4). Step 4: The ratio of the effective collection area of ​​the two collection bags (5) on both sides of the ice crystal nozzle (9) being tested and the ratio of the collection overlap area of ​​the two collection bags (5) on both sides of the ice crystal nozzle (9) being tested are equal to M. Draw a graph to solve for the effective coverage diameter (d) of a single ice crystal nozzle (9) being tested. Step 5: Arrange the ice crystal nozzle (9) to be tested according to the axial spacing (h) of the ice crystal nozzle (9), the width X of the test section area (8), and the height Y of the test section area (8) to ensure the distribution of ice crystals in the test section area (8).

2. The ice crystal field uniformity measuring device according to claim 1, characterized in that, The frame, collector (4), and wire rope (3) form a non-detachable structure, while the collection bag (5) and clamp (6) are detachable structures.

3. The ice crystal field uniformity measuring device according to claim 1, characterized in that, In step one, x = X - 10, y = Y - 10; Where: x is the width of the bottom surface (1) of the frame; y is the height of the side (2) of the frame; X is the width of the test section region (8); Y is the height of the test section area (8).

4. The ice crystal field uniformity measuring device according to claim 1, characterized in that, In step two, the ice crystal field uniformity measuring device is fixed in the test section area (8), and the mass m1 and m2 of the collection bags (5) on both sides of the ice crystal nozzle (9) are measured using an external weighing sensor (7). If the value of m1:m2 is between 0.85 and 1.15, then there is no problem with the structure and installation of the ice crystal field uniformity measuring device.

5. The ice crystal field uniformity measuring device according to claim 1, characterized in that, In step four, the ratio of the overlapping areas of the collection bags (5) on both sides of the ice crystal nozzle 9 being tested is the ratio of the axial spacing (h) of the ice crystal nozzle (9) being tested.

6. The ice crystal field uniformity measuring device according to claim 1, characterized in that, The test section area (8) is a cold environment, that is, the temperature is below 0℃.

7. The ice crystal field uniformity measuring device according to claim 1, characterized in that, The two sides of the collection bag (5) on both sides of the ice crystal nozzle (9) being tested are the north and south sides.

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