A method for evaluating burst pressure of a cylindrical helical inclined crack of a heat transfer tube

Abstract

This invention specifically relates to a method, computer equipment, and storage medium for assessing the burst pressure of a cylindrical helical oblique crack in a heat transfer tube, belonging to the technical field of crack burst pressure assessment. The method includes: establishing an empirical formula for assessing the burst pressure of an axial crack; establishing a formula for the burst pressure enhancement coefficient of a cylindrical helical oblique crack relative to an axial crack; obtaining the size of the cylindrical helical oblique crack to be assessed for burst pressure; calculating the axial crack burst pressure of the same size as the cylindrical helical oblique crack to be assessed; calculating the burst pressure enhancement coefficient of the cylindrical helical oblique crack to be assessed relative to an axial crack; and multiplying the axial crack burst pressure by the burst pressure enhancement coefficient to obtain the burst pressure of the cylindrical helical oblique crack to be assessed. The computer equipment and storage medium are used to implement the steps of the above method. This invention achieves the assessment of the burst pressure of a cylindrical helical oblique crack.

Description

Technical Field

[0001] This invention relates to the field of steam generator heat transfer tube crack burst pressure assessment technology, and in particular to a method, computer equipment and storage medium for assessing the burst pressure of cylindrical spiral oblique cracks in heat transfer tubes. Background Technology

[0002] As one of the core pieces of equipment in a nuclear power plant, the steam generator is primarily used for heat transfer between the primary and secondary loops, and its integrity is crucial for the safe and reliable operation of the plant. Heat transfer tubes, as a major component of the steam generator, constitute over 50% of the primary loop pressure boundary and are also the weakest link in the entire steam generator. If a heat transfer tube ruptures, radioactive coolant can bypass the containment vessel, leading to nuclear radiation leakage. Therefore, preventing heat transfer tube rupture during nuclear power plant operation is of paramount importance. To prevent heat transfer tube rupture, a safety assessment of defective heat transfer tubes must be conducted, and calculating the burst pressure under different defects and sizes is the first step in this assessment.

[0003] Based on degradation morphology, heat transfer tube degradation can be classified into cracking, wear, and pitting. According to the crack direction, cracks can be further classified as axial, circumferential, and oblique. Current research on crack burst pressure only focuses on axial and circumferential cracks. However, in actual engineering, cracks may be neither axial nor circumferential, but rather oblique cracks at a certain angle to the tube's axis. Cylindrical helical oblique cracks are a special type of oblique crack. Currently, there is no method for assessing the burst pressure of cylindrical helical oblique cracks, thus failing to provide support for safety assessments of these cracks. Summary of the Invention

[0004] The purpose of this invention is to provide a method, computer equipment, and storage medium for assessing the burst pressure of oblique cracks in a cylindrical helix of a heat transfer tube, thereby enabling the assessment of the burst pressure of oblique cracks in a cylindrical helix and providing support for the safety assessment of oblique cracks in a cylindrical helix.

[0005] To achieve the above objectives, the present invention provides a method for assessing the burst pressure of a spiral oblique crack in a heat transfer tube, comprising the following steps:

[0006] Step 1: Establish empirical formulas for assessing axial crack burst pressure;

[0007] Step 2: Establish the relationship between the burst pressure enhancement coefficient of the cylindrical helical oblique crack and the axial crack;

[0008] Step 3: Obtain the size of the cylindrical spiral oblique crack with the burst pressure to be evaluated;

[0009] Step 4: Calculate the axial crack burst pressure of the cylindrical spiral oblique crack of the same size according to the formula in Step 1.

[0010] Step 5: Calculate the burst pressure enhancement coefficient of the cylindrical spiral oblique crack relative to the axial crack according to the formula in Step 2.

[0011] Step 6: Multiply the axial crack burst pressure from Step 4 by the burst pressure enhancement factor from Step 5 to obtain the burst pressure of the cylindrical helical oblique crack to be evaluated.

[0012] As one feasible approach, in step one, the empirical formula for assessing axial crack burst pressure is:

[0013]

[0014] Among them, P Axi S is the axial crack burst pressure, in MPa; A is a constant, dimensionless; C is a constant, in MPa; S f α is the flow pressure of the heat transfer tube, in MPa; L is the axial crack length, in mm; t is the heat transfer tube wall thickness, in mm; h is the relative depth of the axial crack, dimensionless; h = H / t; H is the actual depth of the axial crack perpendicular to the wall surface, in mm; α = t / d; d is the outer diameter of the heat transfer tube, in mm.

[0015] As one feasible approach, step two involves establishing the relationship between the burst pressure enhancement coefficient of the cylindrical helical oblique crack and the axial crack, including the following steps:

[0016] Step 201: Conduct burst pressure tests on the cylindrical spiral oblique crack and the axial crack respectively to obtain the burst pressure test data of the cylindrical spiral oblique crack. The burst pressure test data of the cylindrical spiral oblique crack includes the angle of the cylindrical spiral oblique crack and the burst pressure enhancement coefficient of the cylindrical spiral oblique crack relative to the axial crack. The burst pressure enhancement coefficient of the cylindrical spiral oblique crack relative to the axial crack = burst pressure of the cylindrical spiral oblique crack / burst pressure of the axial crack.

[0017] Step 202: Using the angle of the cylindrical spiral oblique crack as the abscissa and the blast pressure enhancement coefficient of the cylindrical spiral oblique crack relative to the axial crack as the ordinate, fit the relationship of the blast pressure enhancement coefficient of the cylindrical spiral oblique crack relative to the axial crack using the least squares method, minimize the sum of squared residuals between the experimental data of the blast pressure of the cylindrical spiral oblique crack and the relationship of the blast pressure enhancement coefficient of the cylindrical spiral oblique crack relative to the axial crack, and determine the best fitting parameters for the relationship of the blast pressure enhancement coefficient of the cylindrical spiral oblique crack relative to the axial crack.

[0018] Step 203: Substitute the best fitting parameters of the formula for the burst pressure enhancement coefficient of the cylindrical spiral oblique crack relative to the axial crack into the formula for the burst pressure enhancement coefficient of the cylindrical spiral oblique crack relative to the axial crack to obtain the formula for the burst pressure enhancement coefficient of the cylindrical spiral oblique crack relative to the axial crack.

[0019] As one possible approach, the best fitting parameters for the burst pressure enhancement coefficient relationship between the cylindrical spiral oblique crack and the axial crack in steps 202 and 203 are a1, a2 and a3.

[0020] The relationship between the burst pressure enhancement coefficient of a cylindrical helical oblique crack and an axial crack is as follows:

[0021] f C-L (θ)=a1θ 2 +a2θ+a3

[0022] Among them, f C-L (θ) is the burst pressure enhancement coefficient of the cylindrical spiral oblique crack relative to the axial crack; θ is the angle of the cylindrical spiral oblique crack, β<θ≤90°, and β is the initiation angle of the cylindrical spiral oblique crack.

[0023] As one possible approach, in step 201, the angle of the oblique crack of the cylindrical spiral is the angle between the tangent of the oblique crack of the cylindrical spiral and the axial direction of the heat transfer tube.

[0024] Bursting pressure tests were conducted on cylindrical spiral oblique cracks with angles of 10°, 15°, 30°, 45°, 60°, 75° and 90° to obtain the bursting pressure of cylindrical spiral oblique cracks;

[0025] A cylindrical spiral oblique crack with an angle of 0° is an axial crack; an explosion pressure test is conducted on the axial crack to obtain the axial crack explosion pressure.

[0026] As one possible approach, in step 201, during the burst pressure test of the cylindrical spiral oblique crack, the size limitations of the cylindrical spiral oblique crack specimen are as follows: the arc of the cylindrical spiral oblique crack projected axially onto the heat transfer tube does not exceed π / 4, the length of the cylindrical spiral oblique crack is 10 mm, the width of the cylindrical spiral oblique crack is 0.1 mm, and the relative depth of the cylindrical spiral oblique crack is 40%.

[0027] As one possible approach, in step three, the dimensions of the cylindrical spiral oblique crack to be evaluated include the length, angle, and relative depth of the cylindrical spiral oblique crack to be evaluated, as well as the flow pressure, wall thickness, and outer diameter of the heat transfer tube.

[0028] The initiation angle of the cylindrical spiral oblique crack to be evaluated is less than the angle of the cylindrical spiral oblique crack to be evaluated, which is less than or equal to 90°.

[0029] To be evaluated d is the outer diameter of the heat transfer tube in mm; θ is the angle of the oblique crack in the cylindrical spiral to be evaluated.

[0030] To achieve the above objectives, in a second aspect, the present invention provides a computer device including a memory and a processor, wherein the memory stores computer-readable instructions, and the processor executes the computer-readable instructions to implement the steps of the above-described method for assessing the burst pressure of a cylindrical spiral oblique crack in a heat transfer tube.

[0031] To achieve the above objectives, in a third aspect, the present invention provides a computer-readable storage medium storing computer-readable instructions, which, when executed, implement the steps of the above-described method for assessing the burst pressure of a cylindrical spiral oblique crack in a heat transfer tube.

[0032] Beneficial technical effects of the present invention:

[0033] This invention discloses a method, computer equipment, and storage medium for assessing the burst pressure of a cylindrical spiral oblique crack in a heat transfer tube. It establishes an empirical formula for assessing the burst pressure of an axial crack. Through burst pressure tests of cylindrical spiral oblique cracks and axial cracks, it constructs a formula for the burst pressure enhancement coefficient of a cylindrical spiral oblique crack relative to an axial crack. Substituting the size parameters of the cylindrical spiral oblique crack to be assessed into the empirical formula for assessing the burst pressure of an axial crack, it obtains the axial crack burst pressure of the same size as the cylindrical spiral oblique crack to be assessed. Substituting the size parameters of the cylindrical spiral oblique crack to be assessed into the formula for the burst pressure enhancement coefficient of a cylindrical spiral oblique crack relative to an axial crack, it obtains the burst pressure enhancement coefficient of the cylindrical spiral oblique crack to be assessed relative to an axial crack. Multiplying the burst pressure of the axial crack of the same size as the cylindrical spiral oblique crack to be assessed by the burst pressure enhancement coefficient of the cylindrical spiral oblique crack to be assessed relative to an axial crack, it obtains the burst pressure of the cylindrical spiral oblique crack to be assessed, providing data support for subsequent safety assessments of cylindrical spiral oblique cracks. Attached Figure Description

[0034] Figure 1 A flowchart of an embodiment of the method for assessing the burst pressure of a cylindrical spiral oblique crack in a heat transfer tube according to the present invention;

[0035] Figure 2 A schematic diagram of the angle of a cylindrical spiral oblique crack;

[0036] Figure 3 The relationship between the burst pressure enhancement coefficient of a cylindrical spiral oblique crack and an axial crack is obtained by fitting burst pressure tests of cylindrical spiral oblique cracks and axial cracks.

[0037] Figure 4 A schematic diagram of a cylindrical spiral oblique crack;

[0038] Figure 5 for Figure 4 Schematic diagram of the angle of a spiral oblique crack in a medium-sized cylinder. Detailed Implementation

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0040] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0041] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings and specific embodiments.

[0042] refer to Figure 1 The flowchart illustrates an embodiment of a method for assessing the burst pressure of a cylindrical spiral oblique crack in a heat transfer tube. The method includes the following steps:

[0043] Step 1: Establish empirical formulas for assessing axial crack burst pressure;

[0044] Step 2: Establish the relationship between the burst pressure enhancement coefficient of the cylindrical helical oblique crack and the axial crack;

[0045] Step 3: Obtain the size of the cylindrical spiral oblique crack with the burst pressure to be evaluated;

[0046] Step 4: Calculate the axial crack burst pressure of the cylindrical spiral oblique crack of the same size according to the formula in Step 1.

[0047] Step 5: Calculate the burst pressure enhancement coefficient of the cylindrical spiral oblique crack relative to the axial crack according to the formula in Step 2.

[0048] Step 6: Multiply the axial crack burst pressure from Step 4 by the burst pressure enhancement factor from Step 5 to obtain the burst pressure of the cylindrical helical oblique crack to be evaluated.

[0049] In this embodiment, as one possible approach, in step one, the empirical formula for evaluating the axial crack burst pressure is:

[0050]

[0051] Among them, P Axi S is the axial crack burst pressure, in MPa; A is a constant, dimensionless; C is a constant, in MPa; S f α is the flow pressure of the heat transfer tube, in MPa; L is the axial crack length, in mm; t is the heat transfer tube wall thickness, in mm; h is the relative depth of the axial crack, dimensionless; h = H / t; H is the actual depth of the axial crack perpendicular to the wall surface, in mm; α = t / d; d is the outer diameter of the heat transfer tube, in mm.

[0052] See Figure 3 In this embodiment, as one possible approach, step two, establishing the relationship between the burst pressure enhancement coefficient of the cylindrical helical oblique crack and the axial crack, includes the following steps:

[0053] Step 201: Conduct burst pressure tests on the cylindrical spiral oblique crack and the axial crack respectively to obtain the burst pressure test data of the cylindrical spiral oblique crack. The burst pressure test data of the cylindrical spiral oblique crack includes the angle of the cylindrical spiral oblique crack and the burst pressure enhancement coefficient of the cylindrical spiral oblique crack relative to the axial crack. The burst pressure enhancement coefficient of the cylindrical spiral oblique crack relative to the axial crack = burst pressure of the cylindrical spiral oblique crack / burst pressure of the axial crack.

[0054] Step 202: Using the angle of the cylindrical spiral oblique crack as the abscissa and the blast pressure enhancement coefficient of the cylindrical spiral oblique crack relative to the axial crack as the ordinate, fit the relationship of the blast pressure enhancement coefficient of the cylindrical spiral oblique crack relative to the axial crack using the least squares method, minimize the sum of squared residuals between the experimental data of the blast pressure of the cylindrical spiral oblique crack and the relationship of the blast pressure enhancement coefficient of the cylindrical spiral oblique crack relative to the axial crack, and determine the best fitting parameters for the relationship of the blast pressure enhancement coefficient of the cylindrical spiral oblique crack relative to the axial crack.

[0055] Step 203: Substitute the best fitting parameters of the formula for the burst pressure enhancement coefficient of the cylindrical spiral oblique crack relative to the axial crack into the formula for the burst pressure enhancement coefficient of the cylindrical spiral oblique crack relative to the axial crack to obtain the formula for the burst pressure enhancement coefficient of the cylindrical spiral oblique crack relative to the axial crack.

[0056] In this embodiment, as one possible approach, the best fitting parameters for the relationship between the bursting pressure enhancement coefficient of the cylindrical helical oblique crack and the axial crack in steps 202 and 203 are a1, a2 and a3.

[0057] The relationship between the burst pressure enhancement coefficient of a cylindrical helical oblique crack and an axial crack is as follows:

[0058] fC-L (θ)=a1θ 2 +a2θ+a3

[0059] Among them, f C-L (θ) is the burst pressure enhancement coefficient of the cylindrical spiral oblique crack relative to the axial crack; θ is the angle of the cylindrical spiral oblique crack, β<θ≤90°, and β is the initiation angle of the cylindrical spiral oblique crack.

[0060] See Figure 2 In this embodiment, as one possible approach, in step 201, the angle of the oblique crack of the cylindrical spiral is the angle between the tangent of the oblique crack of the cylindrical spiral and the axial direction of the heat transfer tube.

[0061] Bursting pressure tests were conducted on cylindrical spiral oblique cracks with angles of 10°, 15°, 30°, 45°, 60°, 75° and 90° to obtain the bursting pressure of cylindrical spiral oblique cracks;

[0062] A cylindrical spiral oblique crack with an angle of 0° is an axial crack; an explosion pressure test is conducted on the axial crack to obtain the axial crack explosion pressure.

[0063] In this embodiment, as one possible approach, in step 201, during the burst pressure test of the cylindrical spiral oblique crack, the size limitations of the cylindrical spiral oblique crack sample are as follows: the arc of the cylindrical spiral oblique crack projected axially onto the heat transfer tube does not exceed π / 4, the length of the cylindrical spiral oblique crack is 10 mm, the width of the cylindrical spiral oblique crack is 0.1 mm, and the relative depth of the cylindrical spiral oblique crack is 40%.

[0064] In this embodiment, as one possible approach, in step three, the dimensions of the cylindrical spiral oblique crack to be evaluated include the length, angle, and relative depth of the cylindrical spiral oblique crack to be evaluated, as well as the flow pressure, wall thickness, and outer diameter of the heat transfer tube.

[0065] The initiation angle of the cylindrical spiral oblique crack to be evaluated is less than the angle of the cylindrical spiral oblique crack to be evaluated, which is less than or equal to 90°.

[0066] To be evaluated d is the outer diameter of the heat transfer tube in mm; θ is the angle of the oblique crack in the cylindrical spiral to be evaluated.

[0067] As an implementation of the above method, the present invention provides an embodiment of a computer device, which corresponds to the embodiment of the above-described method for assessing the burst pressure of a cylindrical spiral oblique crack in a heat transfer tube.

[0068] The computer device described in this embodiment includes a memory, a processor, and a network interface that are communicatively connected to each other via a system bus. It should be noted that this embodiment only shows a computer device with a memory, processor, and network interface; however, it should be understood that it is not required to implement all the shown components, and more or fewer components can be implemented alternatively. Those skilled in the art will understand that the computer device described here is a device capable of automatically performing numerical calculations and / or information processing according to pre-set or stored instructions, and its hardware includes, but is not limited to, microprocessors, application-specific integrated circuits, programmable gate arrays, digital processors, embedded devices, etc.

[0069] The computer device can be a desktop computer, laptop, handheld computer, or cloud server, etc. The computer device can interact with the user via a keyboard, mouse, remote control, touchpad, or voice control.

[0070] The memory includes at least one type of readable storage medium, including flash memory, hard disk, multimedia card, card-type memory, random access memory, static random access memory, read-only memory, electrically erasable programmable read-only memory, programmable read-only memory, magnetic memory, disk, optical disk, etc. In some embodiments, the memory may be an internal storage unit of the computer device, such as the hard disk or memory of the computer device. In other embodiments, the memory may also be an external storage device of the computer device, such as a plug-in hard disk, smart memory card, secure digital card, flash memory card, etc., equipped on the computer device. Of course, the memory may include both the internal storage unit and the external storage device of the computer device. In this embodiment, the memory is typically used to store the operating system and various application software installed on the computer device, such as the computer-readable instructions of the above-mentioned heat transfer tube cylindrical spiral oblique crack burst pressure assessment method. In addition, the memory may also be used to temporarily store various types of data that have been output or will be output.

[0071] In some embodiments, the processor may be a central processing unit, a controller, a microcontroller, a microprocessor, or other data processing chip. The processor is typically used to control the overall operation of the computer device. In this embodiment, the processor is used to execute computer-readable instructions stored in the memory or to process data, such as executing the computer-readable instructions for the aforementioned method for assessing the burst pressure of a cylindrical helical oblique crack in a heat transfer tube.

[0072] The network interface may include a wireless network interface or a wired network interface, which is typically used to establish communication connections between the computer device and other electronic devices.

[0073] As an implementation of the above method, the present invention provides an embodiment of a computer-readable storage medium, which corresponds to the embodiment of the above-described method for assessing the burst pressure of a cylindrical spiral oblique crack in a heat transfer tube.

[0074] The computer-readable storage medium described in this embodiment stores computer-readable instructions that can be executed by at least one processor to cause the at least one processor to perform the steps of the above-described method for assessing the burst pressure of a spiral oblique crack in a heat transfer tube cylinder.

[0075] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A method for assessing the burst pressure of a cylindrical helical oblique crack in a heat transfer tube, characterized in that, Includes the following steps: Step 1: Establish empirical formulas for assessing axial crack burst pressure; Step 2: Establish the relationship between the burst pressure enhancement coefficient of the cylindrical helical oblique crack and the axial crack, including the following steps: Step 201: Conduct burst pressure tests on the cylindrical spiral oblique crack and the axial crack respectively to obtain the burst pressure test data of the cylindrical spiral oblique crack. The burst pressure test data of the cylindrical spiral oblique crack includes the angle of the cylindrical spiral oblique crack and the burst pressure enhancement coefficient of the cylindrical spiral oblique crack relative to the axial crack. The burst pressure enhancement coefficient of the cylindrical spiral oblique crack relative to the axial crack = burst pressure of the cylindrical spiral oblique crack / burst pressure of the axial crack. Step 202: Using the angle of the cylindrical spiral oblique crack as the abscissa and the blast pressure enhancement coefficient of the cylindrical spiral oblique crack relative to the axial crack as the ordinate, fit the relationship of the blast pressure enhancement coefficient of the cylindrical spiral oblique crack relative to the axial crack using the least squares method, minimize the sum of squared residuals between the experimental data of the blast pressure of the cylindrical spiral crack and the relationship of the blast pressure enhancement coefficient of the cylindrical spiral oblique crack relative to the axial crack, and determine the best fitting parameters for the relationship of the blast pressure enhancement coefficient of the cylindrical spiral oblique crack relative to the axial crack. Step 203: Substitute the best fitting parameters of the formula for the burst pressure enhancement coefficient of the cylindrical spiral oblique crack relative to the axial crack into the formula for the burst pressure enhancement coefficient of the cylindrical spiral oblique crack relative to the axial crack to obtain the formula for the burst pressure enhancement coefficient of the cylindrical spiral oblique crack relative to the axial crack. Step 3: Obtain the size of the cylindrical spiral oblique crack with the burst pressure to be evaluated; Step 4: Calculate the axial crack burst pressure of the same size cylindrical spiral oblique crack under the same conditions as the one being evaluated, according to the formula in Step 1. Step 5: Calculate the burst pressure enhancement coefficient of the cylindrical spiral oblique crack relative to the axial crack according to the formula in Step 2. Step 6: Multiply the axial crack burst pressure from Step 4 by the burst pressure enhancement coefficient from Step 5 to obtain the burst pressure of the cylindrical helical oblique crack to be evaluated.

2. The method for assessing the burst pressure of a cylindrical spiral oblique crack in a heat transfer tube according to claim 1, characterized in that, In step one, the empirical formula for assessing the burst pressure of axial cracks is: in, This represents the burst pressure of the axial crack, expressed in MPa. It is a constant, dimensionless; It is a constant, and the unit is MPa; This represents the flow pressure in the heat transfer tube, in MPa. The length of the axial crack is in mm. The heat transfer tube wall thickness is in mm. The relative depth of the axial crack is dimensionless. H represents the actual depth of the axial crack perpendicular to the wall surface, in mm. d is the outer diameter of the heat transfer tube, in mm.

3. The method for assessing the burst pressure of a cylindrical spiral oblique crack in a heat transfer tube according to claim 1, characterized in that, The best fitting parameters for the relationship between the burst pressure enhancement coefficient of the cylindrical helical oblique crack and the axial crack in steps 202 and 203 are: , and ; The relationship between the burst pressure enhancement coefficient of a cylindrical helical oblique crack and an axial crack is as follows: f C-L (θ)= Among them, f C-L (θ) is the burst pressure enhancement coefficient of the cylindrical helical oblique crack relative to the axial crack; θ is the angle of the cylindrical helical oblique crack. º, The starting angle of the cylindrical spiral oblique crack.

4. The method for assessing the burst pressure of a cylindrical spiral oblique crack in a heat transfer tube according to claim 1, characterized in that, In step 201, the angle of the oblique crack of the cylindrical spiral is the angle between the tangent of the oblique crack of the cylindrical spiral and the axial direction of the heat transfer tube. Bursting pressure tests were conducted on cylindrical spiral oblique cracks with angles of 10°, 15°, 30°, 45°, 60°, 75° and 90° to obtain the bursting pressure of cylindrical spiral oblique cracks; A cylindrical spiral oblique crack with an angle of 0° is an axial crack; an explosion pressure test is conducted on the axial crack to obtain the axial crack explosion pressure.

5. The method for assessing the burst pressure of a cylindrical spiral oblique crack in a heat transfer tube according to claim 1, characterized in that, In step 201, during the burst pressure test of the cylindrical spiral oblique crack, the size limitations of the cylindrical spiral oblique crack specimen are as follows: the arc of the cylindrical spiral oblique crack projected axially onto the heat transfer tube shall not exceed... The length of the cylindrical spiral oblique crack is 10 mm, the width of the cylindrical spiral oblique crack is 0.1 mm, and the relative depth of the cylindrical spiral oblique crack is 40%.

6. The method for assessing the burst pressure of a cylindrical spiral oblique crack in a heat transfer tube according to claim 1, characterized in that, In step three, the dimensions of the cylindrical spiral oblique crack to be evaluated include the length, angle, and relative depth of the cylindrical spiral oblique crack to be evaluated, as well as the flow pressure, wall thickness, and outer diameter of the heat transfer tube. The initiation angle of the cylindrical spiral oblique crack to be evaluated is less than the angle of the cylindrical spiral oblique crack to be evaluated. 90°; Length of cylindrical spiral oblique crack to be evaluated ; This refers to the outer diameter of the heat transfer tube, in mm. The angle of the oblique spiral crack on the cylinder to be evaluated.

7. A computer device comprising a memory and a processor, wherein the memory stores computer-readable instructions, characterized in that, When the processor executes the computer-readable instructions, it implements the steps of the method for assessing the burst pressure of a cylindrical helical oblique crack in a heat transfer tube as described in any one of claims 1-6.

8. A computer-readable storage medium storing computer-readable instructions thereon, characterized in that, When the computer-readable instructions are executed, they implement the steps of the method for assessing the burst pressure of a cylindrical spiral oblique crack in a heat transfer tube as described in any one of claims 1-6.

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