Wave-shaped heat dissipation structure with turbulent flow ribs and wall surface coupled design
By designing a wavy heat dissipation structure with spoiler ribs and wall coupling on the cooling channel of the radiator, the problem of limited heat exchange capacity of the existing radiator is solved, and more efficient heat exchange performance and more uniform heat exchange effect are achieved.
Patent Information
- Application Number
- CN202411534003.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2025-02-11
AI Technical Summary
The existing radiator has a single structure and insufficient wall design, resulting in limited heat exchange capacity.
A wavy heat dissipation structure with spoiler ribs coupled to the wall is designed. By setting a bionic wavy spoiler rib on the top and bottom walls of the cooling channel, and designing the side walls into wavy to enhance the heat exchange effect.
Through the coupling design of spoiler ribs and wall surfaces, the heat exchange performance of the radiator is significantly improved, the disturbance and mass exchange of air conditioners are improved, and the heat exchange uniformity is improved.
Smart Images
Figure CN119412998A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of motor radiator cooling, and in particular to a wave-shaped heat dissipation structure with a spoiler rib and a wall surface coupled design. Background Art
[0002] The motor is the core of energy conversion and is now used in electric vehicles, drones and other tools. The most common brushless motors are brushless gearless hub motors, brushless geared hub motors, etc. When the motor converts electrical energy into mechanical energy, it will inevitably generate a lot of heat. If this part of the heat cannot be taken away in time, the performance and service life of the motor will be affected to a certain extent.
[0003] At present, most radiators have a relatively simple fin structure, few wall designs, and limited heat exchange capacity. Therefore, it is necessary to design a cooling channel that can greatly enhance the wall heat exchange by coupling ribs and walls. Summary of the invention
[0004] 1. Technical problems to be solved: Most existing radiators have a relatively simple fin structure, few wall designs, and limited heat exchange capacity.
[0005] In view of the above technical problems, the present invention provides a wave-shaped heat dissipation structure with spoiler ribs and wall surface coupling design.
[0006] 2. Technical solution: A wave-shaped heat dissipation structure with a spoiler rib and a wall surface coupling design comprises a cooling channel, wherein the cooling channel consists of a top wall, a bottom wall and two left and right side walls, the surfaces opposite to the top wall and the bottom wall are parallel horizontal surfaces, the surfaces opposite to the two side walls are symmetrically arranged vertical bionic wavy surfaces, two spoiler ribs with bionic wavy lines are symmetrically arranged on the top wall and the bottom wall, the sinusoidal wave X-axis of the spoiler rib coincides with the symmetry center lines of the two side walls, and the wave crest (valley) of the spoiler rib coincides with the wave crest (valley) of one of the side wall surfaces at the X-axis position, two rib blocks are arranged in each period of the sinusoidal wave of the spoiler rib, and a gap is arranged between two adjacent rib blocks.
[0007] Furthermore, the number of sinusoidal wave periods of the spoiler rib is the same as that of the side wall surface, and is not less than 6, preferably 10.
[0008] Furthermore, the front ends of the two rib blocks in a single period of the spoiler rib are respectively arranged at 35%-45% and 80%-90% of the period length.
[0009] Furthermore, the interval between two ribs in a single period of the spoiler ribs is 5% to 50% of the period length, preferably 20%.
[0010] Furthermore, the height of the rib is 10% to 40% of the maximum channel width.
[0011] Furthermore, the fluctuation amplitude of the spoiler rib is 10% to 50% of the maximum channel width.
[0012] Furthermore, the height of the cooling channel is the same as the maximum channel width, ranging from 12.7 mm to 25.4 mm.
[0013] Furthermore, the amplitude of the bionic wavy sidewall is adjusted according to the heat exchange requirements in each cycle, wherein the ratio of the amplitude to the channel height is 0.05-0.4.
[0014] 3. Beneficial effects: Compared with the prior art, the wavy heat dissipation structure with spoiler ribs and wall coupling design proposed in the present invention further enhances the heat exchange effect by arranging a cooling structure with discontinuous bionic wavy spoiler ribs on the upper and lower surfaces of the cooling channel inside the radiator, and designing the side wall surface to be wavy. Compared with the continuous wavy ribs, the double discontinuity has an increased disturbance effect on the cold air due to the increase of the notch, which significantly promotes the mass exchange between the cold air and the mainstream in the discontinuous area of the ribbed wall, significantly improves the heat exchange performance of the ribbed wall, and at the same time, the intense mass transfer slightly increases the flow loss. However, the existence of the discontinuity weakens the strength of the recirculation vortex behind the ribs, and the overall heat exchange performance is significantly improved. The design of the wavy side wall can further concentrate the cold air, strengthen the disturbance of the cold air, and enhance the heat exchange uniformity of the channel by adjusting the degree of fluctuation in different periods. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 A schematic diagram of a wave-shaped heat dissipation structure of the present invention; Figure 2 It is a schematic diagram of the plan view of the uniformly waving side wall structure of the present invention; Figure 3 It is a schematic diagram of the top view of the planar structure of the non-uniform wave of the side wall of the present invention; Figure 4 It is a side cross-sectional view of the uniformly waving side wall in the present invention; Figure 5 Comparison of the overall dimensionless Nusselt number of the ribbed wall in different sidewall uniform wave schemes; Figure 6 Comparison of the dimensionless Nusselt number along the ribbed wall in different side wall non-uniform wave schemes. DETAILED DESCRIPTION
[0016] The present invention will be described in detail below with reference to the accompanying drawings.
[0017] As attached Figure 1 To Attachment Figure 6 , Specific embodiment: like Figure 1 and Figure 2 A wave-shaped heat dissipation structure with a spoiler rib and a wall coupling design comprises a cooling channel, wherein the cooling channel consists of a top wall, a bottom wall and two left and right side walls, the surfaces opposite to the top wall and the bottom wall are parallel horizontal surfaces, the surfaces opposite to the two side walls are symmetrically arranged vertical bionic wavy surfaces, two bionic wavy line spoiler ribs are symmetrically arranged on the top wall and the bottom wall, the sinusoidal wave X-axis of the spoiler rib coincides with the symmetry center lines of the two side walls, and the X-axis position of the wave crest (valley) of the spoiler rib coincides with the wave crest (valley) of one of the side wall surfaces, two rib blocks are arranged in each period of the sinusoidal wave of the spoiler rib, and a gap is arranged between two adjacent rib blocks.
[0018] The side wall of the cooling channel is a sine wave with 10 cycles, and the number of sine wave cycles of the spoiler rib is the same as that of the side wall. The front ends of the two rib blocks in a single cycle of the spoiler rib are set at 35%~45% and 80%~90% of the cycle length respectively. The interval between the two rib blocks in a single cycle of the spoiler rib is 5%~50% of the cycle length. The height of the rib block is 10%~40% of the maximum channel width. The fluctuation amplitude of the spoiler rib is 10%~50% of the maximum channel width. The height of the cooling channel is the same as the maximum channel width, ranging from 12.7mm to 25.4mm.
[0019] The amplitude of the bionic wavy sidewall is adjusted according to the heat transfer requirements in each cycle. The wavy heat dissipation structure with sidewall amplitudes of 0.4, 0.3, 0.2 and 0.1 times the prototype amplitude is taken, where the prototype amplitude is 27% of the maximum channel width. The interval between two adjacent ribs of the intermittent spoiler rib is 20% of the cycle length. A three-dimensional model is established for simulation calculation.
[0020] like Figure 5 As shown in the figure, with the increase of the side wall amplitude, the dimensionless Nusselt number of the ribbed end wall increases accordingly, indicating that under the coupling effect of the wavy side wall, the bionic wavy spoiler ribs can obtain better heat transfer performance, but the corresponding pressure loss also increases significantly.
[0021] According to Figure 6It can be seen that with the increase of the termination fluctuation amplitude of the side wall, the overall dimensionless Nusselt number of the ribbed end wall also increases. The heat transfer along the bionic wavy intermittent ribs shows a trend of being high in the middle period and poor at the front and rear ends, while the increase in the side wall fluctuation amplitude along the way can improve the heat transfer in the tail period, and to a certain extent can weaken the non-uniformity of heat transfer along the channel. However, only the wavy design of the side wall has limited improvement in the heat transfer performance of the wall, and cannot completely eliminate the difference in heat transfer performance between cycles. The following table is a comprehensive comparison of several wavy heat dissipation structures with different spoiler ribs and wall coupling designs. Among them, when the amplitude is 0.4, the overall dimensionless Nusselt number of the ribbed end wall is the largest, the heat transfer performance of the channel is the highest, but the pressure loss is also the highest, and the comprehensive heat transfer performance index TP Therefore, when high heat exchange is required, the use of a large amplitude structure has obvious advantages.
[0022] The dimensionless Nusselt number is defined as follows: In the formula, h is the heat transfer coefficient, D is the characteristic length, is the thermal conductivity, is the inlet Reynolds number, is the Prandtl number.
[0023] The indicators of comprehensive heat transfer performance are defined as follows: in , .
[0024] Although the present invention has been disclosed as above in terms of preferred embodiments, they are not intended to limit the present invention. Anyone skilled in the art can make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection defined by the claims of this application.
Claims
1. A wave-shaped heat dissipation structure with spoiler ribs and wall coupling design, characterized in that: The invention comprises a cooling channel, wherein the cooling channel is composed of a top wall, a bottom wall and two left and right side walls, the opposite surfaces of the top wall and the bottom wall are parallel horizontal surfaces, the opposite surfaces of the two side walls are symmetrically arranged vertical bionic wavy surfaces, two bionic wavy line spoiler ribs are symmetrically arranged on the top wall and the bottom wall, the sinusoidal wave X-axis of the spoiler rib coincides with the symmetry center line of the two side walls, and the wave crest (valley) of the spoiler rib coincides with the wave crest (valley) of one of the side wall surfaces in the X-axis position, two rib blocks are arranged in each period of the sinusoidal wave of the spoiler rib, and a gap is arranged between two adjacent rib blocks.
2. The wave-shaped heat dissipation structure with spoiler ribs and wall surface coupled design according to claim 1, characterized in that: The number of sinusoidal wave periods of the spoiler rib is the same as that of the side wall surface, and the number of periods is not less than 6.
3. A wave-shaped heat dissipation structure with spoiler ribs and wall surface coupling design according to claim 1 or 2, characterized in that: The front ends of the two rib blocks in a single period of the spoiler rib are respectively arranged at 35%-45% and 80%-90% of the period length.
4. The wave-shaped heat dissipation structure with spoiler ribs and wall surface coupled design according to claim 3, characterized in that: The interval between two rib blocks in a single period of the spoiler rib is 5% to 50% of the period length.
5. The wave-shaped heat dissipation structure with spoiler ribs and wall surface coupled design according to claim 4, characterized in that: The height of the ribs is 10% to 40% of the maximum channel width.
6. The wave-shaped heat dissipation structure with spoiler ribs and wall surface coupled design according to claim 5, characterized in that: The fluctuation amplitude of the spoiler rib is 10% to 50% of the maximum channel width.
7. The wave-shaped heat dissipation structure with spoiler ribs and wall surface coupled design according to claim 6, characterized in that: The height of the cooling channel is the same as the maximum channel width, ranging from 12.7 mm to 25.4 mm.
8. The wave-shaped heat dissipation structure with spoiler ribs and wall surface coupled design according to claim 7, characterized in that: The amplitude of the bionic wavy side wall is adjusted according to the heat exchange requirements in each cycle, wherein the ratio of the amplitude to the channel height is 0.05-0.4.