CN109737455B - Unstability-resistant heater combustion chamber barrel - Google Patents
Unstability-resistant heater combustion chamber barrel Download PDFInfo
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- CN109737455B CN109737455B CN201811588539.8A CN201811588539A CN109737455B CN 109737455 B CN109737455 B CN 109737455B CN 201811588539 A CN201811588539 A CN 201811588539A CN 109737455 B CN109737455 B CN 109737455B
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- cooling
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- reinforcing ribs
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- grooves
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Abstract
The invention provides an anti-instability heater combustion chamber cylinder, which adopts a water cooling technology of increasing the height of a cooling channel reinforcing rib and installing a flow baffle plate to ensure that a combustion chamber can work safely and stably for a long time. The combustion chamber barrel comprises an inner barrel and an outer barrel: the cooling device is characterized in that more than two axial strip-shaped grooves are distributed on the outer circumferential surface of the inner cylinder body along the circumferential direction to serve as cooling grooves, and the wall surfaces on two sides of each cooling groove serve as cooling channel reinforcing ribs; the height of the cooling channel reinforcing ribs at the two axial end positions of the cooling groove is greater than that of the cooling channel reinforcing ribs at the middle section; and a flow blocking strip is embedded on the surface of each cooling groove in the middle section, and a water inlet channel and a water outlet channel which are communicated with the cooling grooves are arranged on the flanges at the two ends of the outer cylinder body.
Description
Technical Field
The invention relates to a combustion chamber structure, in particular to an anti-instability combustion chamber cylinder, and belongs to the technical field of engine ground test devices.
Background
The heater for the hypersonic large-scale free jet test bed has the advantages that the size of the inner profile of the structure is large, the working temperature and the working pressure are high, the heater needs to work in a wide Mach number range, the heater needs to simulate incoming flow conditions in a corresponding range, the incoming flow enthalpy value is high under the high Mach number condition, and high requirements are provided for the thermal protection of a heater combustion chamber cylinder; on the other hand, because the flow rate of the heater is required to be higher overall, the size of the heater is doubled compared with the previous heater, and the thermal protection of the test piece with the correspondingly increased size is more severe.
The maximum diameter of a combustion chamber of a heater of the prior equipment is only 460mm, and for a large-size combustion chamber of the heater with the maximum diameter of 700mm, instability and heat exchange strength of a cooling structure are key points of the design of the combustion chamber. The traditional water cooling mode of the combustion chamber cylinder adopts a straight groove or spiral water groove structure, the straight groove has the best cooling effect, but the strength is poorer than that of a spiral shape; the spiral water tank has good structural strength, but the cooling effect is poorer than that of a straight tank. However, no matter which form of water cooling is adopted, heat exchange and instability are very severe spears.
Therefore, to meet the needs of experimental research, it is necessary to design a heater combustor can that can operate reliably under high enthalpy conditions, and meet the needs of operating time.
Disclosure of Invention
In view of the above, the invention provides an anti-instability heater combustion chamber cylinder, which has good cooling effect and high structural strength, and fully solves the contradiction between instability and heat exchange.
The unstability-resistant heater combustion chamber cylinder comprises an inner cylinder and an outer cylinder which are coaxially sleeved, wherein more than two axial strip-shaped grooves are circumferentially distributed on the outer circumferential surface of the inner cylinder to serve as cooling grooves, and water inlet channels and water outlet channels communicated with the cooling grooves are arranged on flanges at two ends of the outer cylinder;
the wall surfaces at two sides of the cooling tank are used as cooling channel reinforcing ribs, wherein the height of the cooling channel reinforcing ribs at two axial end positions of the cooling tank is greater than that of the cooling channel reinforcing ribs at the middle section; and inlay at every cooling bath interlude way surface and adorn the fender stream strip, the fender stream strip is sealed with the cooling bath interlude upper surface that corresponds, the both ends of fender stream strip are contradicted with the cooling channel strengthening rib at both ends respectively, realize the axial spacing.
The water inlet channel is arranged in an inward inclined mode, and a corner is formed at the communication position of the water inlet channel and the cooling groove.
Has the advantages that:
aiming at the problem of thermal protection of a high enthalpy heater combustion chamber cylinder, the water cooling technology of increasing the height of a cooling channel reinforcing rib and installing a flow blocking strip is adopted for the combustion chamber cylinder, so that the combustion chamber can work safely and stably for a long time. The structure is easy to process, good in cooling effect and high in structural strength, and the problem of contradiction between instability and heat exchange is fully solved.
Drawings
FIG. 1 is a schematic view of a combustion chamber barrel structure;
FIG. 2 is a main schematic view of the inner cylinder after the flow blocking strip is installed;
FIG. 3 is a cross-sectional view of the inner barrel after the flow-blocking strip is installed;
FIG. 4 is a schematic sectional view of the water inlet and outlet structure of the front and rear flanges of the combustion chamber.
Wherein: 1-inner cylinder, 2-outer cylinder, 3-flange, 6-flow blocking strip and 7-water inlet channel
Detailed Description
The invention is described in detail below by way of example with reference to the accompanying drawings.
The embodiment provides a heater combustion chamber barrel suitable for large-scale anti-instability workable, improves the design through carrying out combustion chamber barrel cooling structure, makes it can satisfy operating time's needs, and has strengthened the stability of structure greatly.
As shown in fig. 1-3, the combustion chamber cylinder comprises an inner cylinder 1 and an outer cylinder 2 which are coaxially sleeved, axial strip-shaped grooves are uniformly distributed on the outer circumferential surface of the inner cylinder 1 along the circumferential direction to serve as cooling grooves, cooling water is introduced into the cooling grooves, and wall surfaces on two sides of the cooling grooves serve as cooling groove reinforcing ribs. The height of the cooling channel reinforcing ribs at the two axial end positions of the cooling groove is greater than that of the cooling channel reinforcing ribs at the middle section; and inlay at every cooling bath interlude way surface and adorn fender stream strip 6, keep off stream strip 6 and seal the cooling bath interlude upper surface that corresponds, keep off stream strip 6 both ends and contradict with the cooling channel strengthening rib that is located both ends respectively, realize that the axial is spacing. The flow blocking strip 6 is added, so that the instability can be resisted, and the flow area of the cooling channel can meet the flow speed requirement; and guarantee under the condition that structural strength can satisfy the operation requirement, the processing of being convenient for, this kind of structural style's combustion chamber barrel has strengthened the stability of barrel structure greatly.
As shown in fig. 4, the flanges 3 at both ends of the outer cylinder 2 are provided with water inlet channels 7 communicated with the cooling tank, the water inlet channels 7 are arranged in an inward inclined manner, and corners are formed at the communication positions with the cooling tank, so that the flow velocity at the corners can be increased, and the formation of vortexes can be prevented.
In the current debugging test, the heater combustion chamber cylinder adopting the structural form effectively meets the cooling requirement, and the smooth operation of the high Mach number test is ensured. The design method is suitable for the high enthalpy heater combustion chamber cylinder, can provide effective thermal protection for the high enthalpy heater combustion chamber cylinder, ensures the test to be carried out, and supports the research of the scramjet engine.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (2)
1. An anti-buckling heater combustion chamber cylinder comprising coaxially nested inner (1) and outer (2) cylinders: the device is characterized in that more than two axial strip-shaped grooves are circumferentially distributed on the outer circumferential surface of the inner cylinder body (1) to serve as cooling grooves, and water inlet channels (7) and water outlet channels which are communicated with the cooling grooves are arranged on flanges (3) at two ends of the outer cylinder body (2);
the wall surfaces at two sides of the cooling tank are used as cooling channel reinforcing ribs, wherein the height of the cooling channel reinforcing ribs at two axial end positions of the cooling tank is greater than that of the cooling channel reinforcing ribs at the middle section; and inlay dress fender stream strip (6) at every cooling bath interlude way surface, keep off stream strip (6) and seal the cooling bath interlude upper surface that corresponds, the both ends of keeping off stream strip (6) are contradicted with the cooling channel strengthening rib at both ends respectively, realize the axial spacing.
2. A heater burner cylinder resistant to buckling as claimed in claim 1, characterised in that the water inlet channel (7) is inwardly inclined forming a corner where it communicates with the cooling slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811588539.8A CN109737455B (en) | 2018-12-25 | 2018-12-25 | Unstability-resistant heater combustion chamber barrel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811588539.8A CN109737455B (en) | 2018-12-25 | 2018-12-25 | Unstability-resistant heater combustion chamber barrel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109737455A CN109737455A (en) | 2019-05-10 |
| CN109737455B true CN109737455B (en) | 2021-01-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811588539.8A Active CN109737455B (en) | 2018-12-25 | 2018-12-25 | Unstability-resistant heater combustion chamber barrel |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116123565A (en) * | 2023-02-09 | 2023-05-16 | 中国空气动力研究与发展中心空天技术研究所 | Water-cooling ignition section of combustion type air heater |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201312915Y (en) * | 2008-12-09 | 2009-09-23 | 张家港市神农药机有限公司 | Double-layer sterilization cabinet |
| CN104949153B (en) * | 2014-03-31 | 2017-09-26 | 北京航天动力研究所 | A kind of the high compression combustion chamber coolant jacket import and export mix and its processing method |
| CN204251081U (en) * | 2014-11-26 | 2015-04-08 | 台州市双辉机械设备有限公司 | A kind of cutting machine wire winding tube |
| CN105276620B (en) * | 2015-06-26 | 2018-02-13 | 中航空天发动机研究院有限公司 | A kind of aeroengine combustor buring room burner inner liner wall compound cooling structure |
| CN205065799U (en) * | 2015-08-03 | 2016-03-02 | 华中科技大学 | A flame holder for combustion chamber and combustion chamber thereof |
| CN108626751B (en) * | 2017-03-15 | 2020-05-05 | 中国航发商用航空发动机有限责任公司 | Flame tube |
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