Visualized big container experimental method of boiling heat transfer

A technology of boiling heat transfer and experimental methods, applied in instruments, scientific instruments, thermal analysis of materials, etc., can solve the problems of no air bubbles, difficulty in observing jet flow, and inability to effectively control the temperature difference in the heating process, so as to achieve easy adjustment, Easy to adjust the experiment and observe the effect

Active Publication Date: 2016-12-07
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The above application focuses on the study of the mechanism of narrow channel boiling heat transfer, but does not give information on how to control the heating method to observe the ge

Method used

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  • Visualized big container experimental method of boiling heat transfer
  • Visualized big container experimental method of boiling heat transfer
  • Visualized big container experimental method of boiling heat transfer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Combine figure 1 , The experimental device for a visualized large container of this embodiment is mainly composed of a bracket, a heating wire fixing and adjusting mechanism, a water bath heating mechanism, a high-speed camera 10 and a scanning electron microscope 11, etc. The heating wire fixing and adjusting mechanism includes a heating wire adjusting mechanism and a heating wire The fixing mechanism, the heating wire adjusting mechanism is connected with the bracket, and is used for horizontally or vertically adjusting the heating wire fixing adjusting mechanism. The water bath heating mechanism is located below the heating wire fixing and adjusting mechanism, and the boiling heating wire 17 on the heating wire fixing mechanism is heated in the water bath heating mechanism.

[0048] The support in this embodiment is mainly composed of an experimental platform base 1 and an experimental platform pillar 3. The three experimental platform pillars 3 are evenly spaced in the ...

Embodiment 2

[0056] The basic structure of a visualized large container experimental device of this embodiment is the same as that of embodiment 1, and the difference is that: the heating wire adjustment mechanism in this embodiment is mainly composed of the top ring 5 of the test bench, the lifting support rod fixing frame 6 and Composed of lifting struts 7. Among them, the top ring 5 of the test bench is fixed on the top of the column 3 of the test bench, and is horizontally fixed. The inner wall of the top ring 5 of the test bench is provided with an annular groove. The two ends of the support rod fixing frame 6 are located in the annular groove, the lifting support rod fixing frame 6 can rotate around the central axis of the top ring 5 of the test bench, and the lifting support rod fixing frame 6 can also be arranged radially above the top ring 5 of the test bench. The main purpose is to achieve rotation, and the specific structure is not particularly limited.

[0057] In addition, a T-s...

Embodiment 3

[0060] set image 3 The basic structure of a visualized large container experimental device of this embodiment is the same as that of embodiment 2, except that the heating wire fixing mechanism in the heating wire fixing and adjusting mechanism is mainly composed of a heating wire fixing frame 8 and a brace 15 Composition, the upper end of the heating wire fixing frame 8 is fixedly connected with the lifting support rod 7, two support rods 15 are arranged at the lower end of the heating wire fixing frame 8, the heating wire fixing frame 8 and the two support rods 15 form a Y-shaped structure, a Y-shaped structure The upper opening is used to fix the boiling pool heating wire 17, and the opening angle of the Y-shaped structure can be adjusted, which is suitable for fixing boiling pool heating wires of different diameters and lengths, and it is convenient to adjust the boiling pool heating wire to a horizontal state.

[0061] The other end of the support rod 15 is provided with a fi...

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PUM

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Abstract

The invention discloses a visualized big container experimental method of boiling heat transfer, belonging to the field of energy heat transfer. The visualized big container experimental method of boiling heat transfer is characterized in that an experimental device is mainly formed by a support, a heating wire fixing and regulating mechanism, a water bath heating mechanism, a high-speed camera, a scanning electron microscope, and the like. The experimental method comprises the following specific steps: carrying out device regulation preparation before experiments; then heating working media; beginning experiments after the temperature reaches the set value; carrying out information collection by utilizing the scanning electron microscope and the high-speed camera; then regulating the working conditions and acquiring data information under different working conditions. The experimental method is applicable to experiments of various working media and can be used for directly observing the growth process of bubbles on a heating wire and various jet flow phenomena and obtaining the relation between the diameter of the bubbles on the heating wire and heat flux, thus providing a theoretical study basis for studying the problem of boiling heat transfer.

Description

Technical field [0001] The invention relates to the technical field of energy heat exchange, and more specifically, to an experimental method for visualizing the boiling heat exchange of a large container. Background technique [0002] Boiling heat transfer heat is transferred from the wall to the liquid to make the liquid boil and vaporize in the convection heat transfer process. Boiling heat transfer is closely related to the generation and separation of bubbles. The conditions for bubble formation are: ①The liquid must be overheated; ②There must be a vaporization core. These conditions are determined by the force balance and thermal balance between the bubble and the surrounding liquid. Boiling, as an efficient heat exchange method with phase change, is widely used in various heat exchange equipment, such as the water wall of the boiler furnace, the cooler of microelectronics, etc. Due to the complex characteristics of bubble behavior, its research is still insufficient. , T...

Claims

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Application Information

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IPC IPC(8): G01N25/08
CPCG01N25/085
Inventor 楚化强丁先汪冬冬魏瑶方瑞雪顾明言朱帅
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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