CN207380959U - Fluid Demonstration Experimental Device - Google Patents

Abstract

The utility model is related to technical field of experiment equipment, more particularly to a kind of fluid demonstrating experiment device, including water tank, demonstration box, projector, ccd image sensor, dyestuff funnel, discharge dyestuff hose and dye nozzles water pipe, the demonstration box is mounted on the top of the projector, the ccd image sensor is arranged on the top of the demonstration box, the bottom surface of the demonstration box is organic transparent glass, the bottom of the demonstration box is equipped with the equidistant dye nozzles water pipe, the dye nozzles water pipe is connected by the discharge dyestuff hose with the dyestuff funnel, the one side of the demonstration box is equipped with scupper hose；The water tank is arranged on the one side of the demonstration box, and the bottom of the water tank is equipped with equidistant flowing water aperture, and the flowing water aperture is connected with the demonstration box, and the one side of water tank is connected by water supply hose with tap.The present apparatus is simple in structure, at low cost.

Description

Fluid Demonstration Experimental Device

technical field

The utility model relates to the technical field of experimental equipment, in particular to a fluid demonstration experimental device.

Background technique

Fluid demonstration equipment can realize direct observation of flow phenomena, obtain intuitive and clear physical images of flow fields and qualitative and quantitative information of flow development and evolution process, and is an important means to establish and improve theoretical models reflecting main flow characteristics. The equipment structure of the fluid demonstration experimental device is complicated and the cost is high, and the demonstrated data cannot be recorded accurately.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the above-mentioned technologies, and provide a fluid demonstration experiment device.

In order to achieve the above object, the utility model adopts the following technical solutions:

A fluid demonstration experimental device is characterized in that it includes a water tank, a demonstration box, a projector, a CCD image sensor, a dye funnel, a dye discharge hose and a dye nozzle water pipe, the demonstration box is installed on the top of the projector, and the The CCD image sensor is arranged on the top of the demonstration box, the bottom surface of the demonstration box is organic transparent glass, the bottom of the demonstration box is provided with equidistant dye nozzle water pipes, and the dye nozzle water pipes are discharged through the The dye hose is connected with the dye funnel, an adjustment knob is arranged on the discharge dye hose, and a drain hose is arranged on one side of the demonstration box; the water tank is arranged on one side of the demonstration box, and the The bottom of the water tank is provided with equidistant water flow holes, the water flow holes communicate with the demonstration box, one side of the water tank is connected with the faucet through a water supply hose, and a water adjustment knob is installed on the water supply hose.

Preferably, an overflow hole is provided on the water tank.

Preferably, the dye funnel is mounted on a bracket.

Preferably, the projector includes a light source, a side reflector, and a bottom reflector. The light emitted by the light source and reflected by the side reflector is further reflected by the bottom reflector, and finally irradiates vertically on the plexiglass to form a background with uniform brightness. .

The beneficial effect of the utility model is: through this experiment device, can simulate the influence of the obstacle in the air flow and liquid flow and fluid on fluid movement, this device demonstrates the laminar flow and the turbulence state of various shape objects through the flow of dye water . The instrument is equipped with a special background light source projection, which projects the fluid state of the object onto the CCD image sensor. The data is transmitted to the computer through the CCD, and with the help of computer software processing means, the image and data can be displayed in real time, and the corresponding data analysis and simulation image reconstruction can be performed. The structure is simple and the cost is low.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the structural representation of the water tank bottom water hole of the utility model;

FIG. 3 is a schematic diagram of the projection structure inside the projector of the present invention.

Detailed ways

The specific implementation of the utility model will be described in detail below in conjunction with the accompanying drawings and preferred embodiments. As shown in Figure 1, a fluid demonstration experimental device includes: the device includes a water tank 1, a demonstration box 5, a support 9, a projector 7 with adjustable background brightness, a dye funnel 14, a dye discharge hose 12, and a water supply hose 3 , Drain hose 8, etc.

The bottom of the demonstration box 5 is organic transparent glass 17, and the end of the demonstration box 5 is provided with a water tank 1, and the bottom of the water tank 1 is provided with equidistant colored nozzle water pipes 2, which are connected with the dye funnel 14 through the discharge dye hose 12, and the dye is discharged after the discharge of the dye. The hose 12 is provided with an adjustment knob 11, through which the flow rate of the dye water 13 flowing out of the color nozzle water pipe 2 can be controlled. The dye water 13 is finally discharged from the demonstration box 5 through the drain hose 8 .

As shown in Figure 1 and Figure 2, the faucet is directly connected to the water supply hose 3, and is connected to the water tank 1 through the water supply hose 3. The bottom of the water tank 1 is provided with equidistant water flow holes 16, and the water in the water tank 1 passes through the water flow holes. 13 flows evenly into the demonstration box 5. The water adjustment knob 4 can control the water level in the water tank 1, and an overflow hole 10 is arranged on the top of the water tank to avoid the phenomenon of water overflowing. The water flowing out in the water tank 1 is finally discharged from the demonstration box 5 through the drain hose 8 .

The selected dye water 13 should make the dyeing line diffuse slowly and have good stability. The alcohol solution of ink, potassium permanganate and aniline pigment can be selected. The color of the dye water and the background of the flow field form a strong contrast, which is convenient for observation.

After putting the experimental modules of different shapes used for detection into the demonstration box 5, and adjusting the different flow velocities by adjusting the knob 11, the development process of the dyeing line flow from laminar flow to transitional flow to turbulent flow can be observed intuitively and clearly. The flow regime can be quantified using the Reynolds number. It can be seen from fluid mechanics that when the flow velocity of the dyeing line formed by the color nozzle water pipe 2 flowing out of the dye water 13 is small by adjusting the knob 11, the Reynolds number is small, the influence of the viscous force on the flow field is greater than that of the inertial force, and the disturbance of the flow velocity in the flow field will Attenuation due to viscous force, the flow is stable, the dye water 13 flows in layers from the dye nozzle water pipe 2, and does not mix with each other, which is a laminar flow; the flow velocity is gradually increased by adjusting the knob 11, and the Reynolds number also increases accordingly, and the dyeing line of the fluid A wavy swing begins to appear, and the frequency and amplitude of the swing increase with the increase of the flow velocity, which is a crossing flow; when the flow velocity increases to a large value, the Reynolds coefficient is large, and the inertial force has a greater influence on the flow field than the viscous force, and the dyed line The flow is relatively unstable, small changes in the flow rate of dye water 13 are easy to develop and strengthen, the dyeing line is no longer clear and variable, and there are many small eddies in the flow field, forming a disordered and irregular turbulent flow field.

As shown in Figure 1, the experiment module of the different shape that detects is placed in demonstration box 5 inside, and demonstration box 5 is on projector 7 tops, and demonstration box 5 bottoms are plexiglass 17, and projector 7 is the plexiglass of demonstration box 5 17 provides background light, adjustable brightness, and the streamline that the dye water 13 that the dye nozzle water pipe 2 of demonstration box 5 inside flows out produces on demonstration box 5 inside is projected on the CCD sensor 13. The data is transmitted to the computer through the CCD, and with the help of computer processing means, the required data can be displayed in real time, and the image and data can be displayed in real time with the help of computer software processing means, and corresponding data analysis and image simulation can be carried out refactor.

As shown in Figure 3, projector 7 comprises light source 6, plexiglass 17, side reflector 18, bottom reflector 19, and its principle is that the light that light source 6 sends and is reflected by side reflector 18, further by bottom reflector 19 reflection, and finally vertically irradiate on the plexiglass 17 to form a background with uniform brightness, and the background brightness can be adjusted.

The above is only a preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made, these improvements and Retouching should also be regarded as the scope of protection of the present utility model.

Claims (4)

1. A kind of fluid demonstration experiment device, it is characterized in that: comprise water tank, demonstration case, projector, CCD image sensor, dye funnel, discharge dye hose and dye nozzle water pipe, described demonstration case is installed on the top of described projector , the CCD image sensor is arranged on the top of the demonstration box, the bottom surface of the demonstration box is organic transparent glass, the bottom of the demonstration box is provided with equidistant dye nozzle water pipes, and the dye nozzle water pipes pass through the The dye discharge hose is connected with the dye funnel, an adjustment knob is arranged on the dye discharge hose, and a drain hose is provided on one side of the demonstration box; the water tank is arranged on one side of the demonstration box, The bottom of the water tank is provided with equidistant small water holes, the water flow holes communicate with the demonstration box, one side of the water tank is connected to the faucet through a water supply hose, and a water adjustment knob is installed on the water supply hose. 2. The fluid demonstration experiment device according to claim 1, characterized in that: the water tank is provided with an overflow hole. 3. The fluid demonstration experimental device according to claim 1, characterized in that: the dye funnel is installed on a bracket. 4. The fluid demonstration experimental device according to claim 1, characterized in that: the projector comprises a light source, a side reflector, and a bottom reflector, and the light emitted by the light source and reflected by the side reflector is further captured by the bottom reflector Reflected, and finally illuminated vertically on the plexiglass to form a background with uniform brightness.