Electric arc simulation method based on reabsorption process

Abstract

An electric arc simulation method based on a reabsorption process comprises the following steps: current passes through gas to generate an electric arc; monitoring temperature distribution data of the electric arc in real time; determining an absorption state area of a radiation absorption part and a radiation state area of a radiation emission part in the arc based on the temperature distribution data; and setting absorbed heat in the absorption state area and setting radiated heat in the radiation state area so as to correct an electric arc simulation result.

Description

Technical Field

[0001] The present invention relates to the technical field of arc simulation, and particularly to an arc simulation method based on the reabsorption process. Background Art

[0002] Arc simulation is an important tool for studying arc phenomena and their applications, and is widely used in fields such as electrical engineering, materials science, and plasma physics. An arc is an ionization phenomenon generated by an electric current passing through a gas, usually occurring under conditions of high voltage and low resistance. It appears as bright light and high temperature and is commonly used in applications such as welding, cutting, and lighting. The arc temperature can reach thousands of degrees, causing the surrounding gas to ionize. The gas flow and heat conduction phenomena in the arc are complex, involving multiple physical processes, which also makes arc simulation difficult.

[0003] With the development of computer technology, arc simulation technology has gradually matured. Through numerical simulation, the behavior and characteristics of the arc can be better understood. The computational fluid dynamics (CFD) method is commonly used in research to simulate the gas flow and heat transfer in the arc.

[0004] Although significant progress has been made in arc simulation technology, many challenges still remain. The reabsorption phenomenon of the arc refers to the process in which the radiation energy generated in the arc is reabsorbed by the gas near the arc. When simplifying the arc model and not considering reabsorption for simulation, during the combustion of the arc, the temperature at the arc center is always the highest, and the spatial temperature distribution decreases monotonically with the increase in the distance from the arc center. However, when the maximum arc temperature is greater than 16000K, the reabsorption phenomenon can significantly affect the simulation results and thus cannot be ignored. The existence of the reabsorption phenomenon easily leads to other situations in the spatial temperature distribution, that is, the spatial temperature on a certain cross-section at a certain moment no longer decreases monotonically with the increase in the distance from the arc center, but shows other distributions. Nevertheless, in most cases, the actual temperature decreases monotonically with the increase in the distance from the arc center. In most arc simulations, if the reabsorption process is considered, then during the entire process of arc simulation, once other distribution situations occur at a certain moment, the subsequent simulation is likely to become more and more divergent over time, which does not conform to the actual experiment.

[0005] The above information disclosed in the background art section is only used to enhance the understanding of the background of the present invention, and thus may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Invention

[0006] The present invention provides an arc simulation method based on the reabsorption process. At each moment, the regions in the arc that absorb and emit radiation are determined based on the temperature distribution, and then the heat absorbed and radiated is set in the corresponding regions, thereby assisting in correcting the simulation results for the next moment and preventing the overall simulation from being distorted.

[0007] An arc simulation method based on the reabsorption process includes:

[0008] An electric current passes through a gas to generate an arc;

[0009] The temperature distribution data of the arc is monitored in real time;

[0010] Based on the temperature distribution data, the absorption state region of the part absorbing radiation and the radiation state region of the part emitting radiation in the arc are determined;

[0011] The heat absorbed is set in the absorption state region and the heat radiated is set in the radiation state region to correct the arc simulation result.

[0012] In the described arc simulation method based on the reabsorption process, when the temperature distribution data shows that the spatial temperature decreases monotonically with the increase of the distance from the arc center, the temperature distribution space with a temperature not lower than 83% of the maximum arc temperature Tmax is the radiation state region of the part emitting radiation in the reabsorption process, the temperature distribution space with a temperature higher than 5000K and lower than 83% of the maximum arc temperature Tmax is the absorption state region of the part absorbing radiation in the reabsorption process, and the temperature distribution space with a temperature lower than 5000K is determined not to be part of the arc.

[0013] In the described arc simulation method based on the reabsorption process, when the temperature distribution data has a peak and the peak is not at the arc center, the temperature at the arc center is lower than 5000K, the non-arc center temperature peak is greater than 83% of the maximum arc temperature Tmax, and the temperatures before and after the peak are both monotonically distributed, the temperature distribution space from the arc center to a temperature of 13000K is the absorption state region of the part absorbing radiation in the reabsorption process, the temperature distribution space from the first time the temperature is greater than 13000K to the end when the temperature drops back to 83% of the maximum arc temperature Tmax is the radiation state region of the part emitting radiation in the reabsorption process, and the remaining temperature distribution space is determined not to be part of the arc.

[0014] In the described arc simulation method based on the reabsorption process, when the temperature distribution data has a peak and the peak is not at the arc center, the temperature at the arc center is lower than 13000K but greater than 5000K, the non-arc center temperature peak is greater than 83% of the maximum arc temperature Tmax, and the temperatures before and after the peak are both monotonically distributed, the temperature distribution space from the arc center to a temperature of 13000K is the absorption state region of the part absorbing radiation in the reabsorption process, the temperature distribution space from the first time the temperature is greater than 13000K to the end when the temperature drops back to 83% of the maximum arc temperature Tmax is the radiation state region of the part emitting radiation in the reabsorption process, and the remaining temperature distribution space is determined not to be part of the arc.

[0015] In the described arc simulation method based on the reabsorption process, the temperature distribution data shows a peak that is not at the arc center. The temperature at the arc center is higher than 13000K but lower than 83% of the maximum arc temperature Tmax. When the non-arc center temperature peak is greater than 83% of the maximum arc temperature Tmax and the temperature is monotonically distributed before and after the peak, the temperature distribution space from the arc center to the point where the temperature starts to decrease and drops to 83% of the maximum arc temperature Tmax is the radiative state region that emits radiation during the reabsorption process. The temperature distribution space from the first time the temperature drops to 83% of the maximum arc temperature Tmax until the temperature drops to 5000K is the absorption state region that absorbs radiation during the reabsorption process. The remaining temperature distribution space is determined not to be part of the arc.

[0016] In the described arc simulation method based on the reabsorption process, the temperature distribution data shows a peak that is not at the arc center. The temperature at the arc center is higher than 83% of the maximum arc temperature Tmax. When the temperature is monotonically distributed before and after the peak, the temperature distribution space from the arc center to the point where the temperature starts to decrease and drops to 83% of the maximum arc temperature Tmax is the radiative state region that emits radiation during the reabsorption process. The temperature distribution space from the first time the temperature drops to 83% of the maximum arc temperature Tmax until the temperature drops to 5000K is the absorption state region that absorbs radiation during the reabsorption process. The remaining temperature distribution space is determined not to be part of the arc.

[0017] In the described arc simulation method based on the reabsorption process, the temperature distribution data shows two peaks, one at the arc center and one valley between the two peaks. The temperature at the arc center is higher than 83% of the maximum arc temperature Tmax. The non-arc center temperature peak is higher than 83% of the maximum arc temperature Tmax. The valley temperature is greater than 13000K and lower than 83% of the maximum arc temperature Tmax. When the temperature is monotonically distributed between the extreme values, the temperature distribution space from the arc center to the first time the temperature rises back to 83% of the maximum arc temperature Tmax is the absorption state region that absorbs radiation during the reabsorption process. The temperature distribution space from the first time the temperature rises back to 83% of the maximum arc temperature Tmax until the temperature drops again to 83% of the maximum arc temperature Tmax is the radiative state region that emits radiation during the reabsorption process. The remaining temperature distribution space is determined not to be part of the arc.

[0018] In the described arc simulation method based on the reabsorption process, the temperature distribution data shows two peaks, one at the arc center and one valley value between the two peaks. The temperature at the arc center is higher than 83% of the maximum arc temperature Tmax, the non-arc center temperature peak is higher than 83% of the maximum arc temperature Tmax, the valley value temperature is greater than 5000K and less than 13000K. When the temperature between each extreme value is monotonically distributed, the temperature distribution space from the arc center to the first time the temperature rises back to 13000K is the absorption state region of the part that absorbs radiation during the reabsorption process, and the temperature distribution space from the first time the temperature rises back to 13000K until the temperature drops again to 83% of the maximum arc temperature Tmax is the radiation state region of the part that emits radiation during the reabsorption process. The remaining temperature distribution space is determined not to be part of the arc.

[0019] In the described arc simulation method based on the reabsorption process, the temperature distribution data shows two peaks, one at the arc center and one valley value between the two peaks. The temperature at the arc center is higher than 83% of the maximum arc temperature Tmax, the non-arc center temperature peak is lower than 83% of the maximum arc temperature Tmax and greater than 13000K, the valley value temperature is greater than 5000K and less than 13000K. When the temperature between each extreme value is monotonically distributed, the temperature distribution space from the arc center to the first time the temperature rises back to 13000K is the absorption state region of the part that absorbs radiation during the reabsorption process, and the temperature distribution space from the first time the temperature rises back to 13000K until the temperature drops again to 13000K is the radiation state region of the part that emits radiation during the reabsorption process. The remaining temperature distribution space is determined not to be part of the arc.

[0020] In the described arc simulation method based on the reabsorption process, the temperature distribution data shows two peaks, one at the arc center and one valley value between the two peaks. The temperature at the arc center is lower than 83% of the maximum arc temperature Tmax and higher than 13000K, the non-arc center temperature peak is higher than 83% of the maximum arc temperature Tmax, the valley value temperature is greater than 5000K and less than 13000K. When the temperature between each extreme value is monotonically distributed, the temperature distribution space from the arc center to the first time the temperature rises back to 13000K is the absorption state region of the part that absorbs radiation during the reabsorption process, and the temperature distribution space from the first time the temperature rises back to 13000K until the temperature drops again to 83% of the maximum arc temperature Tmax is the radiation state region of the part that emits radiation during the reabsorption process. The remaining temperature distribution space is determined not to be part of the arc.

[0021] Compared with the prior art, the present invention has the following advantages: In arc simulation, many schemes ignore the radiation reabsorption process. Although this processing method simplifies the calculation, it deviates greatly from the actual situation. This scheme is designed for arc simulation that takes into account the radiation reabsorption process, and is advanced and accurate. The scheme uses a total of 10 temperature distributions that will appear in arc simulation. Considering that these 10 distribution diagrams can almost completely cover all the situations that will appear in arc simulation, summarizing them is conducive to quickly solving problems that arise in arc simulation. The 10 temperature distribution situations are analyzed in detail, and the three thresholds of the temperature distribution curve are determined to be 83%Tmax, 13000K, and 5000K, respectively. The radiation state and absorption state of each situation are divided into regions. Finally, a large number of simulation results are used to prove that judging and dividing according to these three thresholds can quickly restore the monotonic distribution when the temperature of the simulation results is not monotonically distributed. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] By reading the detailed description of the preferred specific embodiments below, various other advantages and benefits of the present invention will become clear to those of ordinary skill in the art. The drawings in the specification are only for the purpose of illustrating the preferred embodiments and are not considered to be limitations of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative work. Moreover, the same reference numerals are used to represent the same components throughout the drawings.

[0023] In the attached picture:

[0024] Figure 1 It is a schematic diagram of temperature distribution data and distribution of absorption state area and radiation state area of ​​an arc simulation method based on a reabsorption process provided by an embodiment of the present disclosure;

[0025] Figure 2 It is a schematic diagram of temperature distribution data and distribution of absorption state area and radiation state area of ​​an arc simulation method based on a reabsorption process provided by an embodiment of the present disclosure;

[0026] Figure 3 It is a schematic diagram of temperature distribution data and distribution of absorption state area and radiation state area of ​​an arc simulation method based on a reabsorption process provided by an embodiment of the present disclosure;

[0027] Figure 4 It is a schematic diagram of temperature distribution data and distribution of absorption state area and radiation state area of ​​an arc simulation method based on a reabsorption process provided by an embodiment of the present disclosure;

[0028] Figure 5It is a schematic diagram showing the temperature distribution data of an arc simulation method based on a reabsorption process and the distribution of the absorption state region and the radiation state region provided by an embodiment of the present disclosure;

[0029] Figure 6 It is a schematic diagram showing the temperature distribution data of an arc simulation method based on a reabsorption process and the distribution of the absorption state region and the radiation state region provided by an embodiment of the present disclosure;

[0030] Figure 7 It is a schematic diagram showing the temperature distribution data of an arc simulation method based on a reabsorption process and the distribution of the absorption state region and the radiation state region provided by an embodiment of the present disclosure;

[0031] Figure 8 It is a schematic diagram showing the temperature distribution data of an arc simulation method based on a reabsorption process and the distribution of the absorption state region and the radiation state region provided by an embodiment of the present disclosure;

[0032] Figure 9 It is a schematic diagram showing the temperature distribution data of an arc simulation method based on a reabsorption process and the distribution of the absorption state region and the radiation state region provided by an embodiment of the present disclosure;

[0033] Figure 10 It is a schematic diagram showing the temperature distribution data of an arc simulation method based on a reabsorption process and the distribution of the absorption state region and the radiation state region provided by an embodiment of the present disclosure;

[0034] Figure 11 It is a schematic diagram of an application example of an arc simulation method based on a reabsorption process provided by an embodiment of the present disclosure.

[0035] The present invention will be further explained below with reference to the accompanying drawings and embodiments. Detailed Embodiments

[0036] The specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although specific embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present invention can be more thoroughly understood and the scope of the present invention can be fully conveyed to those skilled in the art.

[0037] It should be noted that in the description and claims, certain terms are used to refer to specific components. Those skilled in the art should understand that technicians may use different terms to refer to the same component. The description and claims of this specification do not distinguish components by the difference in terms, but by the difference in the functions of the components. As used throughout the description and claims, "comprising" or "including" is an open-ended term and should be interpreted as "including but not limited to". The subsequent description of the specification is the preferred embodiment for implementing the present invention, but the description is for the purpose of the general principles of the specification and is not used to limit the scope of the present invention. The protection scope of the present invention shall be subject to what is defined by the appended claims.

[0038] For ease of understanding the embodiments of the present invention, the following will further explain with specific embodiments in conjunction with the drawings, and each drawing does not constitute a limitation to the embodiments of the present invention.

[0039] As Figures 1 to 11 shown, the arc simulation method based on the reabsorption process includes the following steps:

[0040] An electric current passes through a gas to generate an arc;

[0041] Real-time monitor the temperature distribution data of the arc;

[0042] Based on the temperature distribution data, determine the absorption state region of the part absorbing radiation and the radiation state region of the part emitting radiation in the arc;

[0043] Set the absorbed heat in the absorption state region and the radiated heat in the radiation state region to correct the arc simulation result.

[0044] In the preferred embodiment of the arc simulation method based on the reabsorption process, when the temperature distribution data shows that the spatial temperature decreases monotonically with the increase of the distance from the arc center, the temperature distribution space with a temperature not lower than 83% of the maximum arc temperature Tmax is the radiation state region of the part emitting radiation in the reabsorption process, the temperature distribution space with a temperature higher than 5000K and lower than 83% of the maximum arc temperature Tmax is the absorption state region of the part absorbing radiation in the reabsorption process, and the temperature distribution space with a temperature lower than 5000K is determined not to be part of the arc.

[0045] In a preferred embodiment of the arc simulation method based on the reabsorption process described above, when the temperature distribution data shows a peak that is not at the arc center, the temperature at the arc center is lower than 5000K, the non-arc center temperature peak is greater than 83% of the maximum arc temperature Tmax, and the temperature is monotonically distributed before and after the peak, the temperature distribution space from the arc center to a temperature of 13000K is the absorption state region of the absorption radiation part during the reabsorption process, the temperature distribution space from the first time the temperature is greater than 13000K until the temperature drops back to 83% of the maximum arc temperature Tmax is the radiation state region of the radiation emission part during the reabsorption process, and the remaining temperature distribution space is determined not to be part of the arc.

[0046] In a preferred embodiment of the arc simulation method based on the reabsorption process described above, when the temperature distribution data shows a peak that is not at the arc center, the temperature at the arc center is lower than 13000K but higher than 5000K, the non-arc center temperature peak is greater than 83% of the maximum arc temperature Tmax, and the temperature is monotonically distributed before and after the peak, the temperature distribution space from the arc center to a temperature of 13000K is the absorption state region of the absorption radiation part during the reabsorption process, the temperature distribution space from the first time the temperature is greater than 13000K until the temperature drops back to 83% of the maximum arc temperature Tmax is the radiation state region of the radiation emission part during the reabsorption process, and the remaining temperature distribution space is determined not to be part of the arc.

[0047] In a preferred embodiment of the arc simulation method based on the reabsorption process described above, when the temperature distribution data shows a peak that is not at the arc center, the temperature at the arc center is higher than 13000K but lower than 83% of the maximum arc temperature Tmax, the non-arc center temperature peak is greater than 83% of the maximum arc temperature Tmax, and the temperature is monotonically distributed before and after the peak, the temperature distribution space from the arc center to the temperature at which the temperature starts to drop and drops to 83% of the maximum arc temperature Tmax is the radiation state region of the radiation emission part during the reabsorption process, the temperature distribution space from the first time the temperature drops to 83% of the maximum arc temperature Tmax until the temperature drops to 5000K is the absorption state region of the absorption radiation part during the reabsorption process, and the remaining temperature distribution space is determined not to be part of the arc.

[0048] In a preferred embodiment of the arc simulation method based on the reabsorption process described above, when the temperature distribution data shows a single peak that is not at the arc center, the temperature at the arc center is higher than 83% of the maximum arc temperature Tmax, and the temperature is monotonically distributed before and after the peak, the temperature distribution space from the arc center to the point where the temperature starts to decrease and drops to 83% of the maximum arc temperature Tmax is the radiative state region that emits radiation during the reabsorption process. The temperature distribution space from the first time the temperature drops to 83% of the maximum arc temperature Tmax until the temperature drops to 5000K is the absorption state region that absorbs radiation during the reabsorption process. The remaining temperature distribution space is determined not to be part of the arc.

[0049] In a preferred embodiment of the arc simulation method based on the reabsorption process described above, when the temperature distribution data shows two peaks with one at the arc center and a trough between the two peaks, the temperature at the arc center is higher than 83% of the maximum arc temperature Tmax, the non-arc center temperature peak is higher than 83% of the maximum arc temperature Tmax, the trough temperature is greater than 13000K and less than 83% of the maximum arc temperature Tmax, and the temperature is monotonically distributed between the extreme values, the temperature distribution space from the arc center to the first time the temperature rises back to 83% of the maximum arc temperature Tmax is the absorption state region that absorbs radiation during the reabsorption process. The temperature distribution space from the first time the temperature rises back to 83% of the maximum arc temperature Tmax until the temperature drops back to 83% of the maximum arc temperature Tmax is the radiative state region that emits radiation during the reabsorption process. The remaining temperature distribution space is determined not to be part of the arc.

[0050] In a preferred embodiment of the arc simulation method based on the reabsorption process described above, when the temperature distribution data shows two peaks with one at the arc center and a trough between the two peaks, the temperature at the arc center is higher than 83% of the maximum arc temperature Tmax, the non-arc center temperature peak is higher than 83% of the maximum arc temperature Tmax, the trough temperature is greater than 5000K and less than 13000K, and the temperature is monotonically distributed between the extreme values, the temperature distribution space from the arc center to the first time the temperature rises to 13000K is the absorption state region that absorbs radiation during the reabsorption process. The temperature distribution space from the first time the temperature rises to 13000K until the temperature drops back to 83% of the maximum arc temperature Tmax is the radiative state region that emits radiation during the reabsorption process. The remaining temperature distribution space is determined not to be part of the arc.

[0051] In a preferred embodiment of the arc simulation method based on the reabsorption process described above, the temperature distribution data shows two peaks, one at the arc center and one valley value between the two peaks. The temperature at the arc center is higher than 83% of the maximum arc temperature Tmax. The non-arc center temperature peak is lower than 83% of the maximum arc temperature Tmax and greater than 13000K. The valley value temperature is greater than 5000K and less than 13000K. When the temperature between each extreme value is monotonically distributed, the temperature distribution space from the arc center to the first temperature rise to 13000K is the absorption state region of the part that absorbs radiation during the reabsorption process. The temperature distribution space from the first temperature rise to 13000K to the temperature drop to 13000K again is the radiation state region of the part that emits radiation during the reabsorption process. The remaining temperature distribution space is determined not to be part of the arc.

[0052] In a preferred embodiment of the arc simulation method based on the reabsorption process described above, the temperature distribution data shows two peaks, one at the arc center and one valley value between the two peaks. The temperature at the arc center is lower than 83% of the maximum arc temperature Tmax and higher than 13000K. The non-arc center temperature peak is greater than 83% of the maximum arc temperature Tmax. The valley value temperature is greater than 5000K and less than 13000K. When the temperature between each extreme value is monotonically distributed, the temperature distribution space from the arc center to the first temperature rise to 13000K is the absorption state region of the part that absorbs radiation during the reabsorption process. The temperature distribution space from the first temperature rise to 13000K to the temperature drop to 83% of the maximum arc temperature Tmax is the radiation state region of the part that emits radiation during the reabsorption process. The remaining temperature distribution space is determined not to be part of the arc.

[0053] In a preferred embodiment of the arc simulation method based on the reabsorption process described above, the temperature distribution data shows three peaks, one at the arc center and two valley values between the three peaks. The temperature at the arc center is 83% higher than the maximum arc temperature Tmax. The inner non-arc center temperature peak is less than 83% of the maximum arc temperature Tmax and greater than 13000K. The outer non-arc center temperature peak is greater than 5000K and less than 13000K. The inner valley value temperature is greater than 13000K and less than 83% of the maximum arc temperature Tmax. The outer valley value temperature is greater than 5000K and less than 13000K. When the temperature between each extreme value is monotonically distributed, the temperature distribution space from the arc center to the second temperature peak is the absorption state region of the part that absorbs radiation during the reabsorption process. The temperature distribution space outside the second temperature peak is the radiation state region of the part that emits radiation during the reabsorption process.

[0054] In one embodiment, from Figure 1As can be seen, this is the most common situation in arc simulation, that is, the spatial temperature decreases monotonically with the increase of the distance from the arc center. If the temperature distribution map at the previous moment is this situation, the simulation usually will not be distorted. According to a large amount of practical experience, we determine that the part where the temperature is higher than 83% of the maximum arc temperature Tmax is the part that emits radiation during the reabsorption process (hereinafter referred to as the radiation state), and the part where the temperature is higher than 5000K and lower than 83% of the maximum arc temperature Tmax is the part that absorbs radiation during the reabsorption process (hereinafter referred to as the absorption state). The part where the temperature is lower than 5000K is determined not to be part of the arc.

[0055] In one embodiment, as Figure 2 shown, this is a minority situation. This distribution has a peak and it is not at the arc center. The temperature at the arc center is lower than 5000K, the non-arc center temperature peak is greater than 83%Tmax, and the temperatures before and after the peak are both monotonically distributed. At this time, we determine that the arc part from the arc center to the temperature of 13000K is in the absorption state, and the part from the moment the temperature first exceeds 13000K to the end when the temperature drops back to 83%Tmax is in the radiation state. The remaining part is determined not to be part of the arc.

[0056] In one embodiment, as Figure 3 shown, this distribution has a peak and it is not at the arc center. The temperature at the arc center is lower than 13000K but higher than 5000K, the non-arc center temperature peak is greater than 83%Tmax, and the temperatures before and after the peak are both monotonically distributed. At this time, we determine that the arc part from the arc center to the temperature of 13000K is in the absorption state, and the part from the moment the temperature first exceeds 13000K to the end when the temperature drops back to 83%Tmax is in the radiation state. The remaining part is determined not to be part of the arc.

[0057] In one embodiment, as Figure 4 shown, this distribution has a peak and it is not at the arc center. The temperature at the arc center is higher than 13000K but lower than 83%Tmax, the non-arc center temperature peak is greater than 83%Tmax, and the temperatures before and after the peak are both monotonically distributed. At this time, we determine that the arc part from the arc center to the moment when the temperature starts to drop and drops to 83%Tmax is in the radiation state, and the part from the moment the temperature first drops to 83%Tmax to the end when the temperature drops to 5000K is in the absorption state. The remaining part is determined not to be part of the arc.

[0058] In one embodiment, as Figure 5As shown, this distribution has a peak and it is not at the arc center. The temperature at the arc center is higher than 83%Tmax, and the temperatures before and after the peak are both monotonically distributed. At this time, we determine that the arc part from the arc center to where the temperature starts to decrease and drops to 83%Tmax is in the radiation state, and the part from when the temperature first drops to 83%Tmax until the temperature drops to 5000K is in the absorption state. The remaining part is determined not to be part of the arc.

[0059] In one embodiment, as Figure 6 shown, this distribution has two peaks and one of them is at the arc center, and there is a trough position between the two peaks. The temperature at the arc center is higher than 83%Tmax, the non-arc-center temperature peak is higher than 83%Tmax, the trough temperature is greater than 13000K and less than 84%Tmax, and the temperatures between the extreme values are all monotonically distributed. At this time, we determine that the arc part from the arc center to when the temperature first rises back to 83%Tmax is in the absorption state, and the part from when the temperature first rises back to 83%Tmax until the temperature drops back to 83%Tmax is in the radiation state. The remaining part is determined not to be part of the arc.

[0060] In one embodiment, as Figure 7 shown, this distribution has two peaks and one of them is at the arc center, and there is a trough position between the two peaks. The temperature at the arc center is higher than 83%Tmax, the non-arc-center temperature peak is greater than 83%Tmax, the trough temperature is greater than 5000K and less than 13000K, and the temperatures between the extreme values are all monotonically distributed. At this time, we determine that the arc part from the arc center to when the temperature first rises back to 13000K is in the absorption state, and the part from when the temperature first rises back to 13000K until the temperature drops back to 83%Tmax is in the radiation state. The remaining part is determined not to be part of the arc.

[0061] In one embodiment, as Figure 8 shown, this distribution has two peaks and one of them is at the arc center, and there is a trough position between the two peaks. The temperature at the arc center is higher than 83%Tmax, the non-arc-center temperature peak is less than 83%Tmax and greater than 13000K, the trough temperature is greater than 5000K and less than 13000K, and the temperatures between the extreme values are all monotonically distributed. At this time, we determine that the arc part from the arc center to when the temperature first rises back to 13000K is in the absorption state, and the part from when the temperature first rises back to 13000K until the temperature drops back to 13000K is in the radiation state. The remaining part is determined not to be part of the arc.

[0062] In one embodiment, as Figure 9As shown, this distribution has two peaks, one at the arc center and one valley value between the two peaks. The temperature at the arc center is lower than 83%Tmax and higher than 13000K. The non-arc-center temperature peak is greater than 83%Tmax, and the valley value temperature is greater than 5000K and less than 13000K. The temperature between each extreme value is monotonically distributed. At this time, we determine that the part of the electric arc from the arc center to the first time the temperature rises back to 13000K is in the absorption state, and the part from the first time the temperature rises back to 13000K to the time when the temperature drops again to 83%Tmax is in the radiation state. The remaining part is determined not to be part of the electric arc.

[0063] In one embodiment, as Figure 10 shown, this distribution has three peaks, one at the arc center and two valley values between the three peaks. The temperature at the arc center is higher than 83%Tmax. The non-arc-center temperature peak closer to the inside is less than 83%Tmax and greater than 13000K, and the non-arc-center temperature peak closer to the outside is greater than 5000K and less than 13000K; the valley value temperature closer to the inside is greater than 13000K and less than 83%Tmax, and the valley value temperature closer to the outside is greater than 5000K and less than 13000K; the temperature between each extreme value is monotonically distributed. At this time, we determine that from the arc center to the second temperature peak is in the absorption state, and the part outside the second temperature peak is in the radiation state. Such a determination can assist in processing unreasonable peaks in the periphery of the electric arc in the electric arc simulation.

[0064] In one embodiment, 0.83Tmax is determined according to the optical thickness of the electric arc, 5000K is determined according to the conductive boundary of the electric arc, and 13000K is determined according to experience.

[0065] In one embodiment, from Figure 11 it can be clearly observed that: at the moment shown in the upper half of Figure 11 , the radial temperature distribution of the electric arc is not monotonic. As Figure 5 shown, this distribution has one peak and it is not at the arc center. The temperature at the arc center is higher than 83%Tmax, and the temperature before and after the peak is monotonically distributed. At this time, we determine that the part of the electric arc from the arc center to the time when the temperature starts to drop and drops to 83%Tmax is in the radiation state, and the part from the first time the temperature drops to 83%Tmax to the end when the temperature drops to 5000K is in the absorption state. The remaining part is determined not to be part of the electric arc.

[0066] This method can be combined with various electric arc simulation software / programs that consider the radiation reabsorption process. After the judgment area is completed, set the radiation and absorption heat in the corresponding area, and correct the temperature distribution to be monotonic, so as to avoid the result divergence caused by abnormal values at a certain moment.

[0067] Although the embodiments of the present invention have been described above in conjunction with the accompanying drawings, the present invention is not limited to the above specific embodiments and application fields. The above specific embodiments are merely illustrative and guiding, rather than restrictive. Those of ordinary skill in the art can also make many forms under the inspiration of this specification and without departing from the scope protected by the claims of the present invention, and all of these fall within the scope of protection of the present invention.

Claims

1. An arc simulation method based on a reabsorption process, characterized in that: The steps include: The electric current passes through the gas to produce an arc; Real-time monitoring of arc temperature distribution data; Determine the absorption state region of the radiation absorbing part and the radiation state region of the radiation emitting part in the arc based on the temperature distribution data; The absorbed heat is set in the absorbing state area and the radiated heat is set in the radiating state area to correct the arc simulation results.

2. The arc simulation method based on the reabsorption process according to claim 1, characterized in that: Preferably, when the temperature distribution data shows that the spatial temperature decreases monotonically with increasing distance from the arc center, the temperature distribution space with a temperature not lower than 83% of the maximum arc temperature Tmax is the radiation state region of the radiation part during the reabsorption process, the temperature distribution space with a temperature higher than 5000K and lower than 83% of the maximum arc temperature Tmax is the absorption state region of the radiation part during the reabsorption process, and the temperature distribution space with a temperature lower than 5000K is determined not to be part of the arc.

3. The arc simulation method based on the reabsorption process according to claim 1, characterized in that: The temperature distribution data shows a peak value which is not at the arc center. The temperature at the arc center is lower than 5000K. The non-arc center temperature peak value is greater than 83% of the arc maximum temperature Tmax. When the temperatures before and after the peak value are monotonically distributed, the temperature distribution space from the arc center to the temperature of 13000K is the absorption state area of ​​the radiation part absorbed during the reabsorption process. The temperature distribution space from the first time the temperature is greater than 13000K to the end when the temperature drops to 83% of the arc maximum temperature Tmax is the radiation state area of ​​the radiation part emitted during the reabsorption process. The remaining temperature distribution space is determined not to be part of the arc.

4. The arc simulation method based on the reabsorption process according to claim 1, characterized in that: The temperature distribution data shows a peak value which is not at the arc center. The temperature at the arc center is lower than 13000K but greater than 5000K. The non-arc center temperature peak value is greater than 83% of the arc maximum temperature Tmax. When the temperatures before and after the peak value are monotonically distributed, the temperature distribution space from the arc center to the temperature of 13000K is the absorption state area of ​​the radiation part absorbed during the reabsorption process. The temperature distribution space from the first time the temperature is greater than 13000K to the end when the temperature drops to 83% of the arc maximum temperature Tmax is the radiation state area of ​​the radiation part emitted during the reabsorption process. The remaining temperature distribution space is determined not to be part of the arc.

5. The arc simulation method based on the reabsorption process according to claim 1, characterized in that: The temperature distribution data shows a peak value which is not at the arc center. The temperature at the arc center is higher than 13000K but lower than 83% of the maximum arc temperature Tmax. The non-arc center temperature peak value is greater than 83% of the maximum arc temperature Tmax. When the temperatures before and after the peak value are monotonically distributed, the temperature distribution space from the arc center to where the temperature starts to drop and drops to 83% of the maximum arc temperature Tmax is the radiation state region of the radiation part emitted during the reabsorption process. The temperature distribution space from the first drop in temperature to 83% of the maximum arc temperature Tmax to the end of the temperature drop to 5000K is the absorption state region of the radiation part absorbed during the reabsorption process. The remaining temperature distribution space is determined not to be part of the arc.

6. The arc simulation method based on the reabsorption process according to claim 1, characterized in that: The temperature distribution data shows a peak value which is not at the arc center. The temperature at the arc center is higher than 83% of the maximum arc temperature Tmax. When the temperatures before and after the peak value are monotonically distributed, the temperature distribution space from the arc center to where the temperature starts to drop and drops to 83% of the maximum arc temperature Tmax is the radiation state region of the radiation part emitted during the reabsorption process. The temperature distribution space from the first drop in temperature to 83% of the maximum arc temperature Tmax to the end of the temperature drop to 5000K is the absorption state region of the radiation part absorbed during the reabsorption process. The remaining temperature distribution space is determined not to be part of the arc.

7. The arc simulation method based on the reabsorption process according to claim 1, characterized in that: The temperature distribution data shows that there are two peaks, one at the center of the arc, and a valley position between the two peaks. The temperature at the center of the arc is higher than 83% of the maximum arc temperature Tmax, the non-arc center temperature peak is higher than 83% of the maximum arc temperature Tmax, the valley temperature is greater than 13000K and lower than 83% of the maximum arc temperature Tmax. When the temperatures between the extreme values ​​are monotonically distributed, the temperature distribution space from the arc center to the first time the temperature rises to 83% of the maximum arc temperature Tmax is the absorption state area of ​​the radiation part absorbed during the reabsorption process, and the temperature distribution space from the first time the temperature rises to 83% of the maximum arc temperature Tmax to the temperature drops to 83% of the maximum arc temperature Tmax again is the radiation state area of ​​the radiation part emitted during the reabsorption process, and the remaining temperature distribution space is determined not to be part of the arc.

8. The arc simulation method based on the reabsorption process according to claim 1, characterized in that: The temperature distribution data shows that there are two peaks, one at the center of the arc, and a valley position between the two peaks. The temperature at the center of the arc is higher than 83% of the maximum arc temperature Tmax, the non-arc center temperature peak is higher than 83% of the maximum arc temperature Tmax, the valley temperature is greater than 5000K and less than 13000K. When the temperatures between the extreme values ​​are monotonically distributed, the temperature distribution space from the arc center to the first time the temperature rises to 13000K is the absorption state area of ​​the radiation part absorbed during the reabsorption process, and the temperature distribution space from the first time the temperature rises to 13000K to the temperature drops to 83% of the maximum arc temperature Tmax again is the radiation state area of ​​the radiation part emitted during the reabsorption process, and the remaining temperature distribution space is determined not to be part of the arc.

9. The arc simulation method based on the reabsorption process according to claim 1, characterized in that: The temperature distribution data shows that there are two peaks, one at the center of the arc, and a valley position between the two peaks. The temperature at the center of the arc is higher than 83% of the maximum arc temperature Tmax, the non-arc center temperature peak is lower than 83% of the maximum arc temperature Tmax and greater than 13000K, the valley temperature is greater than 5000K and less than 13000K. When the temperatures between the extreme values ​​are monotonically distributed, the temperature distribution space from the arc center to the first time the temperature rises to 13000K is the absorption state area of ​​the radiation part absorbed during the reabsorption process, and the temperature distribution space from the first time the temperature rises to 13000K to the temperature drops to 13000K again is the radiation state area of ​​the radiation part emitted during the reabsorption process, and the remaining temperature distribution space is determined not to be part of the arc.

10. The arc simulation method based on the reabsorption process according to claim 1, characterized in that: The temperature distribution data shows that there are two peaks, one at the center of the arc, and a valley position between the two peaks. The temperature at the center of the arc is lower than 83% of the maximum arc temperature Tmax and higher than 13000K. The non-arc center temperature peak is greater than 83% of the maximum arc temperature Tmax, and the valley temperature is greater than 5000K and less than 13000K. When the temperatures between the extreme values ​​are monotonically distributed, the temperature distribution space from the arc center to the first time the temperature rises to 13000K is the absorption state area of ​​the radiation part absorbed during the reabsorption process, and the temperature distribution space from the first time the temperature rises to 13000K to the temperature drops to 83% of the maximum arc temperature Tmax again is the radiation state area of ​​the radiation part emitted during the reabsorption process, and the remaining temperature distribution space is determined not to be part of the arc.

Images