A test device for flame acceleration and deflagration-to-detonation transition under column group disturbance

Abstract

The present invention discloses a test device for flame acceleration and deflagration-to-detonation conversion under column group disturbance, comprising a deflagration chamber and a column group assembly arranged in the deflagration chamber, wherein the column group assembly is detachably arranged in the deflagration chamber, the column group assembly comprises a base and a column module, a plurality of column modules are arranged on the base, the column module comprises a first mounting portion and a test portion, the base comprises a second mounting portion, and the first mounting portion is detachably connected to the second mounting portion. Thus, the present invention can realize flexible arrangement of the column modules in the longitudinal and transverse spacing of the base through a detachable combination method, which is conducive to improving the test efficiency of flame acceleration and deflagration-to-detonation tests. At the same time, when conducting flame acceleration and deflagration-to-detonation tests under conditions of different column shapes or column sizes, column modules of different cross-sectional shapes and sizes can be conveniently replaced, thereby avoiding the processing of a large number of fixed obstacles, so as to greatly reduce the test cost.

Description

Technical Field

[0001] The present invention relates to the field of fire safety technology, and in particular to a testing device based on flame acceleration and deflagration-to-detonation conversion under column group disturbance. Background Art

[0002] Combustible gas explosions are a common safety hazard in industrial production and daily life. Real-world scenarios involving combustible gas often involve clusters of columnar structures (i.e., column clusters), such as cooling pipes, storage tank clusters, and building support columns. Combustible gas leaks and mixes with air, igniting upon encountering an open flame or a high-temperature wall. Flame propagation gradually accelerates due to flame instability. In particular, the presence of column clusters in the flame propagation path significantly accelerates flame acceleration, causing a slow deflagration to develop into a rapid deflagration or even a highly destructive detonation. Therefore, for engineering applications such as gas explosion prevention and the development of detonation propulsion technology, in-depth research on flame acceleration and the deflagration-to-detonation transition phenomenon under column cluster disturbance is necessary.

[0003] As the premixed flame propagates downstream along the length of the test section, the flame front, gas flow, and pressure waves are all disturbed by the columns. The structural arrangement of the columns involves factors such as longitudinal and transverse column spacing, column shape, and column size, where longitudinal and transverse refer to directions parallel and perpendicular to the length of the test section, respectively. Research has shown that these longitudinal and transverse column spacing, column shape, and column size significantly influence gas flame acceleration and deflagration-to-detonation transitions. Therefore, it is necessary to comprehensively consider these factors in flame acceleration and deflagration-to-detonation transition tests.

[0004] A lot of research has been conducted in the existing technology on the flame acceleration and deflagration-to-detonation phenomenon under the action of traditional obstacles. However, the traditional obstacle form adopted by the research institute is mainly to arrange multiple orifice plates or fence-type obstacles along the longitudinal direction of the pipeline. Compared with this traditional unidirectional obstacle arrangement, the structure of the column group is more complex, the processing is more difficult, and the cost is higher. Therefore, there is a lack of test data based on flame acceleration and deflagration-to-detonation phenomenon under column group disturbance, which is not conducive to studying the development of combustible gas deflagration under various column group scenarios. Summary of the Invention

[0005] The present invention aims to address at least one of the technical problems existing in the prior art. To this end, the present invention proposes a testing device for flame acceleration and deflagration-to-detonation transitions under column group disturbance. This device utilizes a modular column group structure, allowing for flexible and variable longitudinal and transverse column spacing, as well as easily altering column shape and size distribution. This facilitates studying the effects of column group structures with varying spacing, shapes, and sizes on gas flame acceleration and deflagration-to-detonation transitions.

[0006] A testing device for flame acceleration and deflagration-to-detonation transition under column group disturbance according to an embodiment of the present invention includes:

[0007] A deflagration chamber, wherein one end of the deflagration chamber is provided with an air inlet and an igniter, and the other end is provided with an air outlet, and a transparent observation window is provided on the side wall of the deflagration chamber between the air inlet and the air outlet;

[0008] A column group assembly, the column group assembly can be detachably arranged in the explosion chamber, the column group assembly includes a base and a column module, multiple column modules are arranged on the base, wherein the column module includes a first mounting part and a testing part, the base includes a second mounting part, and the first mounting part is detachably connected to the second mounting part.

[0009] According to some embodiments of the present invention, the explosion chamber includes a explosion pipe, a first end plate and a second end plate, the first end plate is detachably provided at one end of the explosion pipe, and / or the second end plate is detachably provided at the other end of the explosion pipe.

[0010] According to some embodiments of the present invention, the explosion pipe includes a top plate and a bottom plate arranged opposite to each other, and a first side plate and a second side plate arranged opposite to each other. The top plate, the bottom plate, the first side plate and the second side plate together enclose the explosion pipe in a square tube shape. The two ends of the first side plate are respectively detachably connected to the top plate and the bottom plate, and / or the second side plate is respectively detachably connected to the top plate and the bottom plate.

[0011] According to some embodiments of the present invention, the base includes a slider unit, a plurality of second mounting portions are provided on the slider unit, and slide grooves are respectively provided on the relative inner walls of the explosion chamber. The two ends of the slider unit are respectively limited in the slide grooves, and a plurality of the slider units are arranged adjacent to each other.

[0012] According to some embodiments of the present invention, the first mounting portion is a stepped column, the second mounting portion is a stepped hole, and the column is inserted into the stepped hole.

[0013] According to some embodiments of the present invention, the first mounting portion is a stud, and the second mounting portion is a threaded hole.

[0014] According to some embodiments of the present invention, the column group assembly further includes a plug, which is detachably mounted on a portion of the second mounting portion.

[0015] According to some embodiments of the present invention, a pressure sensor is further included, and at least one of the pressure sensors is disposed on a side wall of the explosion chamber.

[0016] Beneficial effects:

[0017] The present invention, through its detachable assembly, enables flexible arrangement of column modules in both the longitudinal and transverse spacing of the base, facilitating improved testing efficiency for flame acceleration and deflagration-to-detonation tests. Furthermore, the shape and size of the test sections of different column modules affect both gas flame acceleration and deflagration-to-detonation tests. When conducting flame acceleration and deflagration-to-detonation tests under conditions of varying column shapes or sizes, column modules with varying cross-sectional shapes and sizes can be easily replaced, thereby avoiding the need to manufacture a large number of fixed obstacles and significantly reducing testing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0019] Figure 1 2. It is a schematic diagram of a testing device for flame acceleration and deflagration-to-detonation conversion according to an embodiment of the present invention;

[0020] Figure 2 Schematic diagram of a cross section of a test device for flame acceleration and deflagration-to-detonation conversion according to an embodiment of the present invention Figure 1 ;

[0021] Figure 3 is a schematic diagram of the internal structure of a deflagration chamber according to an embodiment of the present invention;

[0022] Figure 4 Schematic diagram of a cross section of a test device for flame acceleration and deflagration-to-detonation conversion according to an embodiment of the present invention Figure 2 ;

[0023] Figure 5 is a structural schematic diagram of a slider unit according to an embodiment of the present invention;

[0024] Figure 6 Schematic diagram of the structure of a column module according to an embodiment of the present invention.

[0025] Reference numerals:

[0026] 100. Test device for flame acceleration and deflagration-to-detonation transition under column group disturbance;

[0027] 1. Deflagration chamber; 11. First end plate; 12. Second end plate; 13. Deflagration duct; 131. Top plate; 132. Bottom plate; 133. First side plate; 134. Second side plate; 21. Base; 211. Second mounting portion; 22. Column module; 221. First mounting portion; 222. Test portion; 31. Air inlet; 32. Air outlet; 33. Ignitor; 34. Transparent observation window; 4. Slider unit; 5. Slide groove; 6. Plug; 7. Pressure sensor. DETAILED DESCRIPTION

[0028] The following is a clear and complete description of the technical solutions in the embodiments of the present disclosure, in conjunction with the drawings in the embodiments disclosed in this application. The description of the embodiments is actually only illustrative and exemplary and does not limit the present disclosure and its application or use. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without carrying out creative work should fall within the scope of protection of the present disclosure. In addition, the technologies, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the technologies, methods and equipment should be considered as part of the specification.

[0029] Reference below Figures 1 to 6 A testing device 100 based on flame acceleration and deflagration-to-detonation transition under column group disturbance according to an embodiment of the present invention is described.

[0030] Specifically, such as Figures 1 to 4 As shown, a test device 100 for flame acceleration and deflagration-to-detonation transition under column group disturbance according to an embodiment of the present invention comprises at least: a deflagration chamber 1 and a column group assembly disposed in the deflagration chamber 1, wherein an air inlet 31 and an igniter 33 are provided at one end of the deflagration chamber 1, and an air outlet 32 ​​is provided at the other end. A transparent observation window 34 is provided on the side wall of the deflagration chamber 1 between the air inlet 31 and the air outlet 32 ​​for performing optical schlieren high-speed photography to capture the flame propagation process and the spatiotemporal evolution of shock waves and turbulence. The column group assembly is detachably disposed in the deflagration chamber 1, and comprises a base 21 and a column module 22. A plurality of column modules 22 are disposed on the base 21, wherein the column module 22 comprises a first mounting portion 221 and a testing portion 222. The base 21 comprises a second mounting portion 211, and the first mounting portion 221 is detachably connected to the second mounting portion 211.

[0031] During use, the number, shape, and installation position of the column modules 22 are determined based on the longitudinal and lateral spacing of the column group, as well as the shape and size distribution requirements of the column modules 22. The first mounting portions 221 of the column modules 22 are then connected to the second mounting portions 211 of the base 21 to achieve installation and fixation of the column modules 22. This detachable assembly allows for flexible placement of the column modules 22 in the longitudinal and lateral spacing of the base 21, facilitating improved testing efficiency in flame acceleration and deflagration-to-detonation tests.

[0032] At the same time, the shape and size of the test portion 222 of different column modules 22 have an impact on gas flame acceleration and deflagration to detonation conversion. When conducting flame acceleration and deflagration to detonation conversion tests under conditions of different column shapes or column sizes, column modules 22 with different cross-sectional shapes and sizes can be easily replaced, thereby avoiding the processing of a large number of fixed obstacles, thereby greatly reducing the test cost.

[0033] Furthermore, based on the above embodiment, Figure 1 and Figure 2 As shown, the explosion chamber 1 includes a explosion pipe 13, a first end plate 11 and a second end plate 12, wherein the first end plate 11 is detachably provided at one end of the explosion pipe 13, and / or the second end plate 12 is detachably provided at the other end of the explosion pipe 13. When in use, the column module 22 can be moved or replaced in the explosion chamber 1 by disassembling the first end plate 11 or the second end plate 12.

[0034] Preferably, the deflagration pipe 13 includes a top plate 131 and a bottom plate 132 disposed oppositely, as well as a first side plate 133 and a second side plate 134 disposed oppositely. During assembly, the top plate 131, the bottom plate 132, the first side plate 133, and the second side plate 134 are collectively enclosed to form the square tube-shaped deflagration pipe 13, and the two ends of the first side plate 133 are detachably connected to the top plate 131 and the bottom plate 132, respectively, and / or the second side plate 134 is detachably connected to the top plate 131 and the bottom plate 132, respectively. This allows the deflagration pipe 13 to be disassembled into smaller unit structures, making it easier to place and transport and reducing floor space. Furthermore, the column module 22 can be more conveniently replaced or moved by removing the side plates, thereby improving testing efficiency.

[0035] Specifically, when the first side panel 133 or the second side panel 134 can only be removed individually, the column module 22 can be replaced or moved by removing one side panel. When the first side panel 133 and the second side panel 134 can be removed simultaneously, the deflagration duct 13 is equivalent to being composed of four panels spliced ​​together, so the column module 22 can be replaced or moved by removing the top panel 131.

[0036] Therefore, various combination modes can be realized through the different combination structures of the above-mentioned explosion chamber 1, thereby facilitating the operation of moving and replacing the column module 22 and effectively improving the test efficiency.

[0037] In some embodiments of the present invention, Figure 3 and Figure 5 As shown, the base 21 includes a slider unit 4, each slider unit 4 is provided with a plurality of second mounting portions 211, and a slide groove 5 is respectively provided on the relative inner side walls of the explosion chamber 1, and the two ends of the slider unit 4 are respectively limited in the slide groove 5, and multiple slider units 4 are arranged adjacent to each other.

[0038] During use, the plate on one side of the explosion chamber 1 can be removed and the slider unit 4 can be slid in. In this way, when a part of the column module 22 needs to be replaced, the slider unit 4 of the corresponding part can be pulled out separately to avoid pulling out the entire base 21, which is conducive to improving the convenience of replacing the column module 22.

[0039] In addition, since there may be relatively violent shock waves in the deflagration chamber 1 when conducting flame acceleration and deflagration to detonation tests, the shock waves will produce a large impact force on the column module 22, and the various forms produced by the assembled column module 22 after being impacted may seriously affect the accuracy of the test results. Therefore, adopting a sliding structure for the slider unit 4 can not only facilitate movement and replacement of the column module 22, but also utilize the structure of the slide groove 5 to limit the slider unit 4, effectively improving the stability of the base 21, thereby avoiding deformation of the base 21 after being subjected to the force of the column module 22, affecting the final test results.

[0040] In some embodiments of the present invention, Figure 6 As shown, the first mounting portion 221 is a column, and the second mounting portion 211 is a stepped hole. During assembly, the column is inserted into the stepped hole. Specifically, the stepped hole is composed of two vertical large square holes and a small square hole with coaxial axes, and the small square hole is above the large square hole. The square hole design is beneficial to prevent the components in the hole from rotating, and at the same time, it can also obtain more space for designing the shape and size of the column.

[0041] During use, the column module 22 is inserted upward along the large square hole of the stepped hole. When the column module 22 is fully embedded in the stepped hole, the testing portion 222 of the column module 22 extends out of the small square hole, while the first mounting portion 221 is embedded in the stepped hole. This ensures the installation stability of the column module 22 and prevents the test shock wave from significantly affecting the shape of the column module 22.

[0042] Preferably, in some embodiments of the present invention, the first mounting portion 221 may also be a stud, and the second mounting portion 211 is a threaded hole, so that the stud can be directly screwed into the threaded hole during assembly, thereby improving assembly efficiency.

[0043] In some embodiments of the present invention, the column group assembly also includes a plug 6, which is detachably provided on a portion of the second mounting portion 211. When in use, a portion of the second mounting portion 211 on the base 21 will be occupied by the column module 22, and the unoccupied second mounting portion 211 can be assembled with the plug 6, thereby reducing the impact of the exposed second mounting portion 211 on the test, thereby improving the test accuracy.

[0044] In some embodiments of the present invention, a pressure sensor 7 is further included, and at least one pressure sensor 7 is arranged on the side wall of the deflagration chamber 1. In this way, the pressure sensor 7 can measure the pressure changes during the flame acceleration and the deflagration-to-detonation process, thereby realizing the synchronous measurement of optical measurement and pressure measurement, and the changing laws during the flame acceleration and the deflagration-to-detonation process can be more clearly understood.

[0045] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0046] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0047] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A test device for flame acceleration and deflagration-to-detonation transition based on column group disturbance, characterized in that: include: A deflagration chamber, wherein one end of the deflagration chamber is provided with an air inlet and an igniter, and the other end is provided with an air outlet, and a transparent observation window is provided on the side wall of the deflagration chamber between the air inlet and the air outlet; A column group assembly, the column group assembly is detachably arranged in the deflagration chamber, the column group assembly includes a base, a column module and a plug, the column module includes a first mounting portion and a testing portion, the base includes a second mounting portion, the first mounting portion is detachably connected to the second mounting portion, the base includes a slider unit, a plurality of second mounting portions are provided on the slider unit, and slide grooves are respectively provided on the opposite inner side walls of the deflagration chamber, the two ends of the slider unit are respectively limited in the slide grooves, and a plurality of the slider units are arranged adjacent to each other; When the testing device is used, the plug can be detachably mounted on the second mounting portion not occupied by the column module, so that the second mounting portion is not exposed.

2. The test device for flame acceleration and deflagration-to-detonation transition based on column group disturbance according to claim 1, characterized in that: The deflagration chamber includes a deflagration pipe, a first end plate and a second end plate. The first end plate is detachably provided at one end of the deflagration pipe, and / or the second end plate is detachably provided at the other end of the deflagration pipe.

3. The test device for flame acceleration and deflagration-to-detonation transition based on column group disturbance according to claim 2, characterized in that: The explosion duct includes a top plate and a bottom plate arranged opposite to each other, and a first side plate and a second side plate arranged opposite to each other. The top plate, the bottom plate, the first side plate and the second side plate jointly enclose the explosion duct in a square tube shape. The two ends of the first side plate are respectively detachably connected to the top plate and the bottom plate, and / or the second side plate is respectively detachably connected to the top plate and the bottom plate.

4. The flame acceleration and deflagration-to-detonation test device based on column group disturbance according to claim 1, characterized in that: The first mounting portion is a stepped column, the second mounting portion is a stepped hole, and the stepped column is inserted into the stepped hole.

5. The test device for flame acceleration and deflagration-to-detonation transition based on column group disturbance according to claim 1, characterized in that: The first mounting portion is a stud, and the second mounting portion is a threaded hole.

6. The flame acceleration and deflagration-to-detonation test device based on column group disturbance according to claim 1, characterized in that: It also includes a pressure sensor, at least one of which is arranged on the side wall of the explosion chamber.

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