CN115452440A - Method and system for evaluating speed uniformity of radiator - Google Patents
Method and system for evaluating speed uniformity of radiator Download PDFInfo
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- CN115452440A CN115452440A CN202211129929.5A CN202211129929A CN115452440A CN 115452440 A CN115452440 A CN 115452440A CN 202211129929 A CN202211129929 A CN 202211129929A CN 115452440 A CN115452440 A CN 115452440A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/002—Thermal testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/005—Testing of complete machines, e.g. washing-machines or mobile phones
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
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Abstract
The invention discloses a method for evaluating the speed uniformity of a radiator, which comprises the following steps of 1: calculating the total outlet area A of the radiator; step 2: arranging a plurality of detection points on the surface of the radiator, and calculating the wind speed at each detection point; and 3, step 3: calculating the area A' covered by the detection point in the set speed range; and 4, step 4: and calculating a parameter U I for evaluating the speed uniformity based on A' and A, and judging whether the uniformity meets the requirement based on the value of U I. The invention has the advantages that: the method for calculating the uniformity is simple and rapid, can rapidly evaluate whether the radiator meets the requirements, is more visual than the traditional method, and can directly check the distribution condition of the surface speed uniformity in post-processing.
Description
Technical Field
The invention relates to the field of automobile detection, in particular to a method and a system for evaluating speed uniformity of a radiator.
Background
Along with pure electric vehicles development, preceding grid open area reduces, and the position is downward, and is higher to the cooling module requirement. Speed uniformity may characterize the uniformity of speed across the heat sink and thus affect heat dissipation. If the uniformity of the cooling module is calculated by the formula
Where Ai is the unit area, A is the total area, ui is the unit speed, average speed.
Although the calculation method in the prior art can quantify the uniformity index, the uniformity distribution of the surface speed cannot be directly displayed, the optimization and the comparison are not facilitated, the speed distribution cannot be intuitively represented, the uniformity distribution cannot be checked in the post-processing, and the optimization and the improvement of the radiator cannot be directly and intuitively optimized by the uniformity.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a method and a system for evaluating the speed uniformity of a radiator.
In order to achieve the purpose, the invention adopts the technical scheme that: a method for evaluating the speed uniformity of heat radiator includes such steps as,
step 1: calculating the total outlet area A of the radiator;
and 2, step: arranging a plurality of detection points on the surface of the radiator, and calculating the wind speed at each detection point;
and step 3: calculating the area A' covered by the detection point in the set speed range;
and 4, step 4: and calculating a parameter UI for evaluating the speed uniformity based on A' and A, and judging whether the uniformity meets the requirement based on the UI value.
The set speed range in step 3 is set based on the average speed V.
The calculation of the average velocity includes: and calculating the average speed V of the surface of the radiator based on the wind speeds corresponding to the plurality of detection points.
The set speed range V1 is set to V2< V1< V3, and V2 and V3 are preset wind speed values.
V2, V3 are V0.6 and V1.4, respectively.
In step 4, the calculation mode of the parameter UI for evaluating the speed uniformity is as follows:
UI＝A`/A。
and when the UI value is larger than a set threshold value UI1, judging that the uniformity meets the requirement, otherwise, judging that the uniformity does not meet the requirement.
And when the UI value meets the uniformity requirement, displaying a uniformity distribution diagram of the radiator, wherein the distribution diagram is a schematic diagram of the total area occupied by the areas corresponding to the sampling points with the speed within a set speed range.
A radiator speed uniformity evaluation system comprises an acquisition unit, a calculation unit and a result output unit, wherein:
the acquisition unit acquires the total area A of the radiator and the wind speed of each sampling point through a plurality of sampling points arranged on the surface of the radiator, and the output end of the acquisition unit is connected with the calculation unit;
the calculating unit calculates the average speed V of the wind speeds of all sampling points and calculates the area A' occupied by the sampling points between V0.6 and V1.4, and further calculates a uniformity evaluation parameter UI; the output end of the computing unit is connected with the result output unit;
and the result output unit is used for outputting the uniformity evaluation result according to the calculated parameter UI.
The invention has the advantages that: the method for calculating the uniformity is simple and rapid, can rapidly evaluate whether the radiator meets the requirements, is more visual than the traditional method, and can directly check the distribution condition of the surface speed uniformity in post-processing.
Drawings
The contents of the expressions in the various figures of the present specification and the labels in the figures are briefly described as follows:
FIG. 1 is a flow chart of the uniformity evaluation method of the present invention;
FIG. 2 is a schematic diagram of a distribution diagram according to the present invention.
Detailed Description
The following description of preferred embodiments of the invention will be made in further detail with reference to the accompanying drawings.
The uniformity evaluation index of the radiator refers to the wind speed on the surface of the radiator in the application, the relation between the heat dissipation performance of the radiator and the wind speed blown to the surface of the radiator by a fan, whether the wind speed on the surface of the radiator meets the requirement or not is comprehensively considered during automobile design, the uniformity of the radiator meets the performance requirement only when the requirement is met, otherwise, the heat dissipation problem is caused when the radiator cannot meet the uniformity, therefore, the uniformity evaluation is needed, whether the setting position, the direction, the angle and the like of a radiator system meet the requirement or not is judged according to the uniformity result, if the requirement cannot be met, the radiator system can be finely adjusted until the requirement is met, and the radiator system has good application to experimental vehicles and tests in the early stage of development.
As shown in fig. 1, which is a flow chart of a method for evaluating speed uniformity of a heat sink according to the present application, the method for evaluating speed uniformity includes,
step 1: calculating the total outlet area A of the radiator; the total area A can be calculated in a mode of inputting the total area A in advance or can be directly obtained;
and 2, step: arranging a plurality of detection points on the surface of the radiator, and calculating the wind speed at each detection point; the corresponding wind speed sensors are arranged on the detection points, so that wind speed data of each detection point can be detected;
and step 3: calculating the average speed V of the surface of the radiator based on the wind speeds corresponding to the plurality of detection points, adding the wind speeds of each detection point, and dividing the sum by the total number of the detection points to obtain the average wind speed of each point;
and 4, step 4: calculating the area A' covered by the detection points in the set speed range; the speed range is set based on the average speed V, and typically the speed range V1 is set such that V2< V1< V3, and V2 and V3 are both preset wind speed values, and in this application are set such that an area of ± 40% of the average speed V, that is, V + 0.6 restricted V1 restricted V1.4.
And 5: and calculating a parameter UI for evaluating the speed uniformity based on A' and A, and judging whether the uniformity meets the requirement based on the UI value. The parameter UI is the ratio of the area of the set speed range to the total area. Namely, the calculation mode of the parameter UI for evaluating the speed uniformity is as follows:
UI＝A`/A。
step 6: and judging whether the radiator at the moment meets the uniformity requirement or not based on the uniformity parameter UI. And when the UI value is larger than a set threshold value UI1, judging that the uniformity meets the requirement, otherwise, judging that the uniformity does not meet the requirement.
In this application if judge unqualified explanation radiator and be provided with the problem, unsatisfied the requirement, can audio-visually adjust then verify again until the homogeneity can not explain the radiator at this moment and satisfy the requirement when satisfying the requirement.
And 7: since the evaluation uniformity is judged by the proportion of the total area occupied by the area corresponding to the range meeting the requirement, the corresponding proportion data and the corresponding distribution diagram can be intuitively output. And when the UI value meets the uniformity requirement, displaying a uniformity distribution diagram of the radiator, wherein the distribution diagram is a schematic diagram of the total area occupied by the corresponding area of the sampling point with the speed within the set speed range. As shown in fig. 2, the area occupied by the sampling points is colored with a certain color, such as gray or other colors, to represent that the portion is in a range of speed between 0.6V and 1.4V, and the range can be visually displayed on the image, so that a position and a range occupied by the area occupying a' on the total area a can be displayed, and the positions and the ranges can directly represent the performance and the uniformity of the radiator to meet the requirements.
The application also provides a system for evaluating the speed uniformity of the radiator, which comprises an acquisition unit, a calculation unit and a result output unit, wherein:
the acquisition unit acquires the total area A of the radiator and the wind speed of each sampling point through a plurality of sampling points arranged on the surface of the radiator, and the output end of the acquisition unit is connected with the calculation unit;
the calculation unit calculates the average speed V of the wind speeds of all sampling points and calculates the area A' occupied by the sampling points between V0.6 and V1.4, and further calculates a uniformity evaluation parameter UI; the output end of the computing unit is connected with the result output unit;
and the result output unit is used for outputting the uniformity evaluation result according to the calculated parameter UI. The evaluation result is that whether the uniformity requirement is met or not is judged based on the UI, the positions occupied by the sampling points with the speed of 0.6V-1.4V on the total surface area of the radiator according to the requirement can be made into a circle with a certain radius according to each sampling point as the center, when the speed of the point is within a threshold value, the area where the circle is located is colored, so that after all the detection points are colored according to the mode, a corresponding distribution diagram can be obtained, and the angle, the position and the like can be adjusted based on the distribution diagram until the uniformity requirement is met.
In the present application
A is the total area, A' is the area of + -40% of the average velocity V, the area of acceptable velocity is the ratio of the total area. The uniformity evaluation parameter is simple and rapid to calculate, is more visual than the traditional method, and can directly check the surface speed uniformity distribution condition in post-processing.
It is clear that the specific implementation of the invention is not restricted to the above-described embodiments, but that various insubstantial modifications of the inventive process concept and technical solutions are within the scope of protection of the invention.
Claims (9)
1. A method for evaluating the speed uniformity of a radiator is characterized by comprising the following steps: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
step 1: calculating the total outlet area A of the radiator;
and 2, step: arranging a plurality of detection points on the surface of the radiator, and calculating the wind speed of each detection point;
and step 3: calculating the area A' covered by the detection point in the set speed range;
and 4, step 4: and calculating a parameter UI for evaluating the speed uniformity based on A' and A, and judging whether the uniformity meets the requirement based on the UI value.
2. The method for evaluating the speed uniformity of the heat sink according to claim 1, wherein: the set speed range in step 3 is set based on the average speed V.
3. The method for evaluating the speed uniformity of the heat radiator as recited in claim 2, wherein: the calculation of the average velocity includes: and calculating the average speed V of the surface of the radiator based on the wind speeds corresponding to the plurality of detection points.
4. A method for evaluating the speed uniformity of a heat sink according to claim 2 or 3, wherein: the set speed range V1 is set to V2< V1< V3, and V2 and V3 are preset wind speed values.
5. The method for evaluating the speed uniformity of the heat sink according to claim 4, wherein: v2, V3 are V0.6 and V1.4, respectively.
6. The method for evaluating the speed uniformity of the heat sink according to claim 1 or 2, wherein: in step 4, the calculation mode of the parameter UI for evaluating the speed uniformity is as follows:
UI＝A`/A。
7. the method for evaluating the speed uniformity of the heat sink according to claim 6, wherein: and when the UI value is larger than a set threshold UI1, judging that the uniformity meets the requirement, otherwise, judging that the uniformity does not meet the requirement.
8. The method for evaluating the speed uniformity of the heat sink according to claim 7, wherein: and when the UI value meets the uniformity requirement, displaying a uniformity distribution diagram of the radiator, wherein the distribution diagram is a schematic diagram of the total area occupied by the corresponding area of the sampling point with the speed within the set speed range.
9. A radiator speed uniformity evaluation system is characterized in that: including acquisition unit, computational element, result output unit, wherein:
the acquisition unit acquires the total area A of the radiator and the wind speed of each sampling point through a plurality of sampling points arranged on the surface of the radiator, and the output end of the acquisition unit is connected with the calculation unit;
the calculating unit calculates the average speed V of the wind speeds of all sampling points and calculates the area A' occupied by the sampling points between V0.6 and V1.4, and further calculates a uniformity evaluation parameter UI; the output end of the computing unit is connected with the result output unit;
and the result output unit is used for outputting the uniformity evaluation result according to the calculated parameter UI.
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| CN202211129929.5A CN115452440A (en) | 2022-09-16 | 2022-09-16 | Method and system for evaluating speed uniformity of radiator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114236162A (en) * | 2021-11-22 | 2022-03-25 | 徐工集团工程机械股份有限公司 | Radiator wind speed measuring device and measuring method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114236162A (en) * | 2021-11-22 | 2022-03-25 | 徐工集团工程机械股份有限公司 | Radiator wind speed measuring device and measuring method thereof |
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