Experimental platform for measuring flow heat transfer characteristics of liquid drops on hot particles

Abstract

The utility model relates to the technical field of fluid mechanics experiments, and particularly discloses an experimental platform for measuring flow heat transfer characteristics of liquid drops on hot particles, which comprises a flow heat transfer characteristic experimental platform body, an experimental platform fixing base and a high-speed camera module. The experimental platform body for measuring the flow heat transfer characteristics of liquid drops on hot particles and the high-speed camera module are arranged on the experimental platform fixing base, the micro-injection pump is fixed to the experimental platform, the lead screw sliding block is fixed to the lead screw, and the position of the lead screw sliding block is adjusted through the lead screw sliding block fixing knob; the liquid drop generator clamp is mechanically connected with the lead screw sliding block, the liquid drop storage pipe is connected with the liquid drop generator through the liquid conveying pipe, the fixing block buckle is fixed to the liquid drop generator clamp, the transverse position of the fixing block buckle is adjusted through the transverse adjusting knob, and the heat conduction copper plate is fixed to the heating platform. The spherical particles are fixed on a heat-conducting copper plate to explore the problems of flow diffusion and heat transfer of liquid drops on the surfaces of the hot particles.

Description

Technical Field

[0001] This invention belongs to the field of fluid mechanics experimental technology, specifically relating to an experimental platform for measuring the flow and heat transfer characteristics of droplets on hot particles. Background Technology

[0002] The flow and diffusion of droplets on solid surfaces is a frequently observed phenomenon. Many problems in industrial and natural environments involve the flow of liquid films, such as inkjet printing, particulate coating, the crude oil industry, and packaging technology.

[0003] Studies on droplet flow on solid substrates have mostly focused on the interaction between droplets and planar substrates, with a lack of research on the interaction between droplets and spherical substrates.

[0004] Currently, although there is a certain research foundation in droplet evaporation and boiling, there is relatively little comprehensive research on the flow diffusion and heat transfer of droplets on the surface of hot particles. Many physical mechanisms are not yet fully understood, and the theoretical system needs to be further improved. At present, there is little research on the maximum diffusion coefficient, maximum spreading area, and diffusion rate of droplets on the surface of heated particles.

[0005] To investigate the flow, diffusion, and heat transfer of droplets on the surface of hot particles, an experimental platform for measuring the flow and heat transfer characteristics of droplets on hot particles is proposed. Utility Model Content

[0006] The purpose of this invention is to provide an experimental platform for measuring the flow and heat transfer characteristics of droplets on hot particles, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] An experimental platform for measuring the flow and heat transfer characteristics of droplets on hot particles includes a high-speed camera module, an experimental platform mounting base, and a platform body. The platform body and the high-speed camera module are mounted on the mounting base. A micro-injection pump is fixed to the platform. A lead screw is mechanically connected to the platform, and a lead screw slider is fixed to the lead screw. The position of the lead screw slider is adjusted by a slider fixing knob. A droplet generator clamp is mechanically connected to the lead screw slider. A droplet storage tube is fixed to the micro-injection pump and connected to the droplet generator via an infusion tube. A fixing block is fixed to the droplet generator clamp, and its lateral position is adjusted by a lateral adjustment knob. The droplet generator fixing block is held in place by the fixing block clamp. The droplet generator is fixed to the fixing block. A height adjuster is fixed to the platform, a heating platform is fixed to the height adjuster, a heat-conducting copper plate is fixed to the heating platform, and spherical particles are fixed to the heat-conducting copper plate.

[0009] Preferably, the spherical particles are fixed at the center of the heat-conducting copper plate, which is fixed at the center of the heating platform to ensure high heat conduction efficiency. The droplet generator and the spherical particles are aligned on the same center line by adjusting the knob on the lead screw slider and the horizontal adjustment knob.

[0010] Preferably, the high-speed camera module and the spherical particle are aligned at the same horizontal level by adjusting the height adjuster.

[0011] Preferably, the lead screw slider is equipped with a lead screw slider fixing knob, which can adjust the height of the drip generator to maintain a certain distance from the spherical particles.

[0012] Preferably, the drop generator fixture is provided with a fixing block buckle, which can stably fix the drop generator fixing block on the experimental table and can switch different fixing blocks to ensure that different sizes of drop generators are used in the experiment. Attached Figure Description

[0013] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0014] Figure 2 This is a schematic diagram of the experimental platform of this utility model;

[0015] Figure 3 This is a schematic diagram of the experimental apparatus of this utility model on the right side;

[0016] Figure 4 This is a schematic diagram of the experimental apparatus of this utility model on the left side;

[0017] In the diagram: Experimental platform fixed base (1); High-speed camera module (2); Experimental table (3); Micro-injection pump (31); Height adjuster (32); Heating platform (33); Backlight panel (34); Lead screw (35); Lead screw slider (36); Droplet generator fixing block (37); Fixing block buckle (38); Droplet generator clamp (39); Infusion tube (310); Horizontal adjustment knob (311); Droplet storage tube (312); Thermally conductive copper plate (313); Spherical particle (314); Droplet generator (315); Lead screw slider fixing adjustment knob (316) Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model. Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by those skilled in the art.

[0019] The terms "first," "second," and similar words used in this utility model application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, unless the context clearly indicates otherwise, the singular forms of "an," "a," or "the," etc., do not indicate a quantity limitation, but rather indicate the presence of at least one. Terms such as "comprising" or "including" indicate that the element or object preceding "comprising" encompasses the features, integrals, steps, operations, elements, and / or components listed following "comprising" or "including," and do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or collections thereof. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] Example 1:

[0022] Please see Figures 1 to 4 As shown, an experimental platform for measuring the flow characteristics of droplets on hot particles includes a micro-injection pump 31 placed on an experimental platform 3. The micro-injection pump 31 is connected to a droplet storage tube 312, and the needle of the droplet storage tube 312 is connected to an infusion tube 310 fixed by a droplet generator fixing block 37. The droplet generator fixing block 37 is connected and fixed to a fixing block buckle 38, which is connected to a droplet generator clamp 39. The lateral position of the fixing block buckle 38 can be adjusted by a lateral adjustment knob 311. The droplet generator clamp 39 is mechanically connected to a lead screw slider 36, and the position of the lead screw slider 36 can be adjusted by adjusting the lead screw slider fixing knob 316 via the lead screw 35. The height adjuster 32 is connected to a heating platform 33, and a heat-conducting copper plate 313 and spherical particles 314 are arranged sequentially above the heating platform. A backlight plate 34 is placed at the rear end of the lead screw 35. It should be noted that the specific model of the heating platform 33 is not an improvement of this application and will not be described further here.

[0023] Working principle: Before the first operation, place the high-speed camera module 2 and the experimental platform 3 stably on the experimental platform fixed base 1. Adjust the lead screw slider 36, the fixing block buckle 38 and the droplet generator clamp 39. The fixing block buckle 38 clamps the droplet generator 315 connected through the infusion tube, so that the droplet generator 315 is placed directly above the spherical particle 314 without contact during the entire operation. The position of the droplet generator 315 can also be finely adjusted during the experiment to achieve the centering effect. Adjust the height adjuster 32 so that the spherical particle 314 on the heat-conducting copper plate 313 on the heating platform 33 and the lens of the high-speed camera module 2 are in a straight line to realize the effect of different Weber numbers on droplet diffusion. Then turn on the backlight 34, start the micro-injection pump 31 and the heating platform 33. After the spherical particle 314 is heated to the experimental temperature, the droplet drips onto the surface of the spherical particle 314 through the droplet storage tube 312 and the infusion tube 310. The boundary of the liquid film on the particle surface is recorded and observed by the high-speed camera module 2.

[0024] Preferably, the heating platform 33 has a heating range of 0-800°C, which can create a wide range of hot wall conditions; the droplet generator 315 can release droplets of different diameters.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A kind of experimental platform for measuring the flow heat transfer characteristics of droplet on hot particle, experimental table (3) and high-speed camera module (2) are fixed on experimental platform fixed base (1), it is characterized in that: The backlight plate (34) is fixed on the experiment table (3), the backlight plate (34) is arranged behind the spherical particle (314) and the liquid drop generator (315), the high-speed camera module (2) is on the same horizontal line with the spherical particle (314), the micro-injection pump (31) is fixed on the experiment table (3), the lead screw (35) is mechanically connected with the experiment table (3), the lead screw sliding block (36) is fixed on the lead screw (35), the position of the lead screw sliding block (36) is adjusted by rotating the lead screw sliding block fixing knob (316), the liquid drop generator clamp (39) is mechanically connected with the lead screw sliding block (36), the liquid drop storage tube (312) is fixed on the micro-injection pump (31), the liquid drop storage tube (312) is connected with the liquid drop generator (315) through the infusion tube (310), the fixed block buckle (38) is fixed on the liquid drop generator clamp (39) and the transverse position of the fixed block buckle (38) is adjusted by the transverse adjusting knob (311), the liquid drop generator fixed block (37) is clamped by the fixed block buckle (38), the liquid drop generator (315) is fixed on the liquid drop generator fixed block (37), the height adjuster (32) is fixed on the experiment table (3), the heating platform (33) is fixed on the height adjuster (32), the heat-conducting copper plate (313) is fixed on the heating platform (33), and the spherical particle (314) is fixed on the heat-conducting copper plate (313).

2. The experimental platform for measuring the heat transfer characteristics of liquid droplets flowing on hot particles according to claim 1, characterized in that: The spherical particle (314) is fixed in the center of the heat-conducting copper plate (313), the heat-conducting copper plate (313) is fixed in the center of the heating platform (33), so that the heat conduction efficiency is high, the liquid drop generator (315) and the spherical particle (314) are on the same center line by adjusting the lead screw sliding block fixing knob (316) and the transverse adjusting knob (311).

3. The experimental platform for measuring the heat transfer characteristics of liquid droplets flowing on hot particles according to claim 1, characterized in that: The high-speed camera module (2) and the spherical particle (314) are on the same horizontal line by adjusting the height adjuster (32).

4. The experimental platform for measuring the heat transfer characteristics of liquid droplets flowing on hot particles according to claim 1, characterized in that: The lead screw sliding block (36) is provided with the lead screw sliding block fixing knob (316), the height of the liquid drop generator (315) can be adjusted so that the spherical particle (314) is kept at a certain distance.

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