CN111692116A - Suction method and device based on porous medium material - Google Patents
Suction method and device based on porous medium material Download PDFInfo
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- CN111692116A CN111692116A CN202010439250.0A CN202010439250A CN111692116A CN 111692116 A CN111692116 A CN 111692116A CN 202010439250 A CN202010439250 A CN 202010439250A CN 111692116 A CN111692116 A CN 111692116A
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- porous medium
- medium material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/02—Selection of particular materials
- F04D29/023—Selection of particular materials especially adapted for elastic fluid pumps
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Abstract
The invention discloses a suction method and a suction device based on a porous medium material, wherein the method comprises the following steps: obtaining the size of a slot of the end wall of the compressor; filling porous medium materials according to sizes; the flow control is carried out on the corner separation in the compressor through the porous medium material, so that the low-energy fluid is sucked into the gas collecting cavity from the flow passage of the compressor. According to the suction method based on the porous medium material, the original common direct grooving or single-hole suction is filled with the porous medium material, the wider-range flow control can be realized, the smaller influence on the flow field can be caused, the defects caused by groove type suction are avoided, and the suction benefit is improved on the premise of low loss.
Description
Technical Field
The invention relates to the technical field of flow control, in particular to a suction method and a suction device based on a porous medium material.
Background
At present, aeroengines and ground gas turbines are developed towards the direction of higher pressure ratio and fewer stages, however, the stage load of a single-stage compressor is obviously increased, the flow direction counter pressure gradient is sharply increased, the separation of the blade surface and the three-dimensional space is further enlarged, the efficiency of the compressor is reduced, and the flow tends to be unstable. Therefore, the bearing limit of the compressor can be further improved by various active and passive flow control means for the internal flow of the compressor.
In the related art, active flow control is generally achieved by a pumping method, wherein pumping is mainly used for separating low-energy fluid in a compressor, such as low-speed fluid of boundary layers or separation areas, from a compressor flow passage through holes or grooves or other forms
However, the orifice has a limited pumping capacity, the range that can be affected and the amount of pumped low energy fluid are relatively small; although the groove type pumping can act in a larger range and remove most of low-energy fluid, for some fluid with higher speed and higher energy content, the fluid can be pumped out of the compressor, so that a lot of unnecessary loss is caused, the overall efficiency of the compressor is indirectly damaged, and the problem needs to be solved.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the first objective of the present invention is to provide a suction method based on porous medium material, which fills the original common direct grooving or single-hole suction with porous medium material, can realize wider flow control and less influence on the flow field, avoids the disadvantages caused by groove suction, and improves the suction benefit on the premise of low loss.
A second object of the invention is to propose a suction device based on porous medium material.
A third object of the invention is to propose an electronic device.
A fourth object of the invention is to propose a computer-readable storage medium.
In order to achieve the above purpose, an embodiment of the first aspect of the present invention provides a suction method based on a porous medium material, including the following steps: obtaining the size of a slot of the end wall of the compressor; filling a porous medium material according to the size; and carrying out flow control on corner separation in the compressor through the porous medium material so as to suck low-energy fluid into a gas collecting cavity from a flow passage of the compressor.
In addition, the suction method based on the porous medium material according to the above embodiment of the present invention may further have the following additional technical features:
according to one embodiment of the invention, the flow control of the corner separation in the compressor by the porous medium material comprises: when the airflow flows through the blades, obtaining the separation dimension of the corner region of the end wall of the compressor and the suction surface of the blades; wherein the blade is in the compressor flowpath; determining the suction flow according to the separation scale and the pressure of the gas collecting cavity; and sucking low-energy fluid from the compressor runner to a gas collecting cavity according to the suction flow.
According to an embodiment of the present invention, the dimension includes a length and a width of the slot, and the filling of the porous medium material according to the dimension includes: determining the length and the width of the porous medium material according to the length and the width of the slot; and filling the slot according to the length and the width of the porous medium material.
According to the suction method based on the porous medium material, the size of the slot of the end wall of the compressor can be obtained, and the porous medium material is filled according to the size; the flow control is carried out on the corner separation in the compressor through the porous medium material, so that the low-energy fluid is sucked into the gas collecting cavity from the flow passage of the compressor. From this, adopt porous medium material to fill original ordinary direct fluting or haplopore suction, combined the advantage of cellular type suction and slot type suction, avoided the drawback that slot type suction brought, under the little prerequisite of loss, promoted the benefit of suction, better control the inside flow separation's of compressor development, and can realize the flow control of wider scope and cause littleer influence to the flow field, can greatly promote the performance of compressor, and reduce the inside flow separation of high load compressor and further promote the through-flow efficiency of compressor.
In order to achieve the above object, a second embodiment of the present invention provides a suction device based on porous medium material, including: the acquisition module is used for acquiring the size of a slot of the end wall of the compressor; the filling module is used for filling the porous medium material according to the size; and the control module is used for controlling the flow of the corner separation in the compressor through the porous medium material so as to suck low-energy fluid into the gas collecting cavity from the compressor flow passage.
According to an embodiment of the present invention, the control module is specifically configured to: when the airflow flows through the blades, obtaining the separation dimension of the corner region of the end wall of the compressor and the suction surface of the blades; wherein the blade is in the compressor flowpath; determining the suction flow according to the separation scale and the pressure of the gas collecting cavity; and sucking low-energy fluid from the compressor runner to a gas collecting cavity according to the suction flow.
According to an embodiment of the present invention, the dimensions include a length and a width of the slot, and the filling module is specifically configured to: determining the length and the width of the porous medium material according to the length and the width of the slot; and filling the slot according to the length and the width of the porous medium material.
According to the suction device based on the porous medium material, the size of the slot of the end wall of the compressor can be obtained, and the porous medium material is filled according to the size; the flow control is carried out on the corner separation in the compressor through the porous medium material, so that the low-energy fluid is sucked into the gas collecting cavity from the flow passage of the compressor. From this, adopt porous medium material to fill original ordinary direct fluting or haplopore suction, combined the advantage of cellular type suction and slot type suction, avoided the drawback that slot type suction brought, under the little prerequisite of loss, promoted the benefit of suction, better control the inside flow separation's of compressor development, and can realize the flow control of wider scope and cause littleer influence to the flow field, can greatly promote the performance of compressor, and reduce the inside flow separation of high load compressor and further promote the through-flow efficiency of compressor.
To achieve the above object, a third aspect of the present invention provides an electronic device, including: the device comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the program to realize the suction method based on the porous medium material.
To achieve the above object, a fourth aspect of the present invention provides a computer-readable storage medium, on which a computer program is stored, the program being executed by a processor to implement the above-mentioned porous medium material-based pumping method.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a schematic view of a related art slot pump;
FIG. 2 is a schematic diagram of a related art orifice suction configuration;
FIG. 3 is a flow chart of a method of porous media material based pumping according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a porous media material based pumping arrangement according to one embodiment of the present invention;
FIG. 5 is a schematic diagram of the pre-suction airflow according to one embodiment of the invention;
FIG. 6 is a schematic diagram of a post-suction airflow based on a porous media material according to one embodiment of the present invention;
fig. 7 is a block schematic diagram of a porous media material based pumping device according to an embodiment of the invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The following describes a suction method and device based on porous medium material according to an embodiment of the present invention with reference to the accompanying drawings.
The gas left in the compressor has better capability of resisting the adverse pressure gradient and separating, so that the compressor has higher pressure ratio and higher efficiency.
Before describing the porous medium material-based pumping method according to an embodiment of the present invention, a simple description will be given of a pumping method according to the related art.
In one example, as shown in fig. 1, fig. 1 is a schematic view of a related art slot type suction structure. Through the grooves 5 with certain length and width formed in the end wall 1, when airflow passes through the blades 2, basically no separation exists on the pressure surfaces 4 of the blades, and flow separation with a larger scale exists on the suction surfaces 3 of the blades, the separation is mainly realized by the fact that the boundary layer of the end wall 1 interacts with the boundary layer of the suction surfaces 3 of the blades to generate a low-speed area or even a backflow area, partial airflow is blocked from passing through, in the related art, suction can be performed through the grooves of the grooves 5 to suck low-energy fluid, but the process can often suck partial main flow fluid out of a flow channel, and unnecessary loss is caused.
In another example, as shown in fig. 2, fig. 2 is a schematic view of a related art orifice type suction. The hole type suction adopts a single hole 5 to suck low-energy fluid, but the single hole has limited action capacity, can only control local flow separation and cannot influence the whole flow passage.
The invention is based on the defects, and provides a suction method based on a porous medium material, which can perform flow control on corner separation in a compressor based on the suction method of the porous medium material, and fully inhibit the flow separation by continuously sucking from a separation starting position to a tail edge part in a larger range, controlling the corner separation of the high-load compressor and sucking low-energy fluid, so that the pressure ratio, the efficiency and other performances of the compressor are improved, the flow capacity, the working pressure ratio and the efficiency of the compressor are improved, and the performance of the compressor and the whole engine is further improved. In addition, the suction method based on the porous medium material can be applied to high-load compressors of commercial or military engines and ground heavy gas turbines.
Fig. 3 is a flow chart of a method for pumping based on porous medium material according to an embodiment of the invention.
As shown in fig. 3, the suction method based on the porous medium material comprises the following steps:
and S1, obtaining the size of the notch of the end wall of the compressor.
It will be appreciated that conventional compressors have a large degree of separation at the corner of the end wall and the suction surface of the compressor blade, which separation directly results in a reduction in compressor efficiency and an increase in flow instability within the compressor.
Furthermore, flow separation often occurs and develops across a larger scale, with portions of the airfoil beginning to separate a short distance behind the leading edge, especially for high load compressors that are more pronounced at extreme operating conditions, and then have developed to a considerable scale separation to the trailing edge of the blade.
Therefore, the above problem is not solved, and the embodiment of the present invention provides a suction method based on a porous medium material.
Specifically, the embodiment of the invention can collect the size of the slot of the end wall of the compressor. The method for acquiring the size of the slot in the end wall of the compressor may be an acquisition method in the related art, and is not described in detail herein in order to avoid redundancy.
And S2, filling the porous medium material according to the size.
Further, according to an embodiment of the present invention, the dimension includes a length and a width of the slot, and the porous medium material is filled according to the dimension, including: determining the length and width of the porous medium material according to the length and width of the slot; and filling the grooves according to the length and the width of the porous medium material.
It will be appreciated that, as shown in fig. 4, the embodiment of the present invention may determine the length and width of the porous medium material according to the length and width of the end wall slot, so as to fill the slot with the porous medium material, and 9 is the filling position in the figure, so as to improve the absorption of the low-energy fluid.
And S3, controlling the flow of the corner separation in the compressor through the porous medium material so as to suck the low-energy fluid into the gas collecting cavity from the flow passage of the compressor.
According to one embodiment of the invention, flow control of corner separation in a compressor by a porous dielectric material comprises: when airflow flows through the blades, the separation dimension of the corner area of the end wall of the compressor and the suction surface of the blades is obtained; wherein, the blade is arranged in a flow passage of the compressor; determining the suction flow according to the separation scale and the pressure of the air collecting cavity; and sucking low-energy fluid from the flow channel of the compressor to the gas collecting cavity according to the suction flow.
It will be appreciated that there is generally a greater separation at the mid-aft portion of the compressor, and that the separation increases in size as it progresses downstream, and that low energy fluid is drawn from the compressor flowpath through the porous material to the plenum by the suction of the channels filled with the porous media material, during which the magnitude of the pressure differential determines the suction flow rate due to the characteristics of the porous media material.
Referring to fig. 5 and 6, 9 in the drawings is a porous medium material, 10 is a gas collecting cavity, the pressure in the gas collecting cavity is detailed, and in the compressor flow passage on the other side of the porous medium region, the pressure near the tail edge is generally higher than that in other regions, so that the porous medium suction can suck more fluid from the tail edge part region, and the separation scale is larger at the position, the required suction flow is also larger, and the actual requirement is more consistent. And the porous medium material avoids forming secondary flow in other directions in the flow passage of the air compressor, and the control effect is more effective compared with the common groove type suction.
That is, in the embodiment of the present invention, at the separation start position, the suction with a small flow rate is performed, and at the separation position such as the trailing edge, the suction with a large flow rate is performed. Therefore, through the novel porous medium suction flow control method, better separation control of the air compressor can be realized, and the performance of the air compressor is greatly improved.
According to the suction method based on the porous medium material provided by the embodiment of the invention, the size of the slot of the end wall of the compressor can be obtained, and the porous medium material is filled according to the size; the flow control is carried out on the corner separation in the compressor through the porous medium material, so that the low-energy fluid is sucked into the gas collecting cavity from the flow passage of the compressor. From this, adopt porous medium material to fill original ordinary direct fluting or haplopore suction, combined the advantage of cellular type suction and slot type suction, avoided the drawback that slot type suction brought, under the little prerequisite of loss, promoted the benefit of suction, better control the inside flow separation's of compressor development, and can realize the flow control of wider scope and cause littleer influence to the flow field, can greatly promote the performance of compressor, and reduce the inside flow separation of high load compressor and further promote the through-flow efficiency of compressor.
Fig. 7 is a block schematic diagram of a porous media material based pumping device according to an embodiment of the present invention. As shown in fig. 7, the suction device based on porous medium material comprises: an acquisition module 100, a fill module 200, and a control module 300.
The obtaining module 100 is used for obtaining the size of the slot of the compressor end wall. The filling module 200 is used for filling porous medium materials according to sizes. The control module 300 is used for flow control of corner separation in the compressor through a porous dielectric material to draw low energy fluid from the compressor flow path to the plenum.
According to an embodiment of the present invention, the control module is specifically configured to: when airflow flows through the blades, the separation dimension of the corner area of the end wall of the compressor and the suction surface of the blades is obtained; wherein, the blade is arranged in a flow passage of the compressor; determining the suction flow according to the separation scale and the pressure of the air collecting cavity; and sucking low-energy fluid from the flow channel of the compressor to the gas collecting cavity according to the suction flow.
According to an embodiment of the present invention, the dimensions include the length and width of the slot, and the filling module 200 is specifically configured to: determining the length and width of the porous medium material according to the length and width of the slot; and filling the grooves according to the length and the width of the porous medium material.
It should be noted that the foregoing explanation of the embodiment of the suction method based on a porous medium material also applies to the suction device based on a porous medium material of this embodiment, and details are not repeated here.
According to the suction device based on the porous medium material provided by the embodiment of the invention, the size of the slot of the end wall of the compressor can be obtained, and the porous medium material is filled according to the size; the flow control is carried out on the corner separation in the compressor through the porous medium material, so that the low-energy fluid is sucked into the gas collecting cavity from the flow passage of the compressor. From this, adopt porous medium material to fill original ordinary direct fluting or haplopore suction, combined the advantage of cellular type suction and slot type suction, avoided the drawback that slot type suction brought, under the little prerequisite of loss, promoted the benefit of suction, better control the inside flow separation's of compressor development, and can realize the flow control of wider scope and cause littleer influence to the flow field, can greatly promote the performance of compressor, and reduce the inside flow separation of high load compressor and further promote the through-flow efficiency of compressor.
An embodiment of the present invention provides an electronic device, including: the device comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein when the processor executes the program, the method for pumping based on the porous medium material is realized.
Embodiments of the present invention provide a computer-readable storage medium, on which a computer program is stored, which when executed by a processor implements the above-described porous medium material-based pumping method.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (8)
1. A method of pumping based on porous media material, comprising the steps of:
obtaining the size of a slot of the end wall of the compressor;
filling a porous medium material according to the size; and
and flow control is carried out on the corner separation in the compressor through the porous medium material so as to suck low-energy fluid into a gas collecting cavity from the compressor flow passage.
2. The porous media material-based pumping method of claim 1, wherein the flow control of corner separation within a compressor by the porous media material comprises:
when the airflow flows through the blades, obtaining the separation dimension of the corner region of the end wall of the compressor and the suction surface of the blades; wherein the blade is in the compressor flowpath;
determining the suction flow according to the separation scale and the pressure of the gas collecting cavity;
and sucking low-energy fluid from the compressor runner to a gas collecting cavity according to the suction flow.
3. The porous media material-based pumping method of claim 1, wherein the dimensions include a length and a width of the slot, and the filling of the porous media material according to the dimensions includes:
determining the length and the width of the porous medium material according to the length and the width of the slot;
and filling the slot according to the length and the width of the porous medium material.
4. A porous media material-based suction device, comprising:
the acquisition module is used for acquiring the size of a slot of the end wall of the compressor;
the filling module is used for filling the porous medium material according to the size; and
and the control module is used for carrying out flow control on the corner separation in the compressor through the porous medium material so as to suck low-energy fluid into a gas collecting cavity from the compressor flow passage.
5. The porous media material-based suction device of claim 4, wherein the control module is specifically configured to:
when the airflow flows through the blades, obtaining the separation dimension of the corner region of the end wall of the compressor and the suction surface of the blades; wherein the blade is in the compressor flowpath;
determining the suction flow according to the separation scale and the pressure of the gas collecting cavity;
and sucking low-energy fluid from the compressor runner to a gas collecting cavity according to the suction flow.
6. The porous media material-based suction device of claim 4, wherein the dimensions include a length and a width of the slot, and the filling module is specifically configured to:
determining the length and the width of the porous medium material according to the length and the width of the slot;
and filling the slot according to the length and the width of the porous medium material.
7. An electronic device, comprising: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor, the instructions being configured to perform a porous media material based pumping method as claimed in any one of claims 1 to 3.
8. A computer-readable storage medium, on which a computer program is stored, the program being executable by a processor for implementing a porous media material based pumping method according to any of claims 1-3.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112228403A (en) * | 2020-10-12 | 2021-01-15 | 中国民航大学 | Compressor stator blade cascade with equal-depth grooves formed in end wall |
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| GB1085227A (en) * | 1963-07-26 | 1967-09-27 | Rolls Royce | Improvements in or relating to gas turbine engines |
| CN103939395A (en) * | 2014-03-19 | 2014-07-23 | 西北工业大学 | Compressor wheel flange casing structure used for end-wall boundary-layer suction |
| CN107143528A (en) * | 2017-06-09 | 2017-09-08 | 北京航空航天大学 | It is a kind of that there is the compressor casing treatment device for expanding steady and noise elimination function |
| KR20180002140A (en) * | 2016-06-28 | 2018-01-08 | 한국기계연구원 | An apparatus for stall suppression of a compressor by porous material |
| CN110160734A (en) * | 2019-05-23 | 2019-08-23 | 华中科技大学 | Wind tunnel nozzle, active noise reducing device and method based on porous media |
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2020
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1085227A (en) * | 1963-07-26 | 1967-09-27 | Rolls Royce | Improvements in or relating to gas turbine engines |
| CN103939395A (en) * | 2014-03-19 | 2014-07-23 | 西北工业大学 | Compressor wheel flange casing structure used for end-wall boundary-layer suction |
| KR20180002140A (en) * | 2016-06-28 | 2018-01-08 | 한국기계연구원 | An apparatus for stall suppression of a compressor by porous material |
| CN107143528A (en) * | 2017-06-09 | 2017-09-08 | 北京航空航天大学 | It is a kind of that there is the compressor casing treatment device for expanding steady and noise elimination function |
| CN110160734A (en) * | 2019-05-23 | 2019-08-23 | 华中科技大学 | Wind tunnel nozzle, active noise reducing device and method based on porous media |
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| CN112228403A (en) * | 2020-10-12 | 2021-01-15 | 中国民航大学 | Compressor stator blade cascade with equal-depth grooves formed in end wall |
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