CN110175408A - Air flue design method is rotated into three-dimensional with boundary-layer isolation aerial drainage - Google Patents
Air flue design method is rotated into three-dimensional with boundary-layer isolation aerial drainage Download PDFInfo
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- CN110175408A CN110175408A CN201910450499.9A CN201910450499A CN110175408A CN 110175408 A CN110175408 A CN 110175408A CN 201910450499 A CN201910450499 A CN 201910450499A CN 110175408 A CN110175408 A CN 110175408A
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Abstract
The invention discloses air flue design method is rotated into a kind of three-dimensional with boundary-layer isolation aerial drainage, the described method comprises the following steps, (1) generates in three-dimensional and rotates into air flue；(2) it chooses the position in isolation aerial drainage section and calculates the displacement thickness for rotating into air flue boundary-layer in the section in three-dimensional；(3) displacement thickness of air flue boundary-layer, design isolation discharge device are rotated into the three-dimensional according to obtained in step (2)；(4) the import of discharge device mainstream to be isolated obtained in step (3), straight stretch backward is waited to obtain discharge device distance piece, rotates into air flue in the final three-dimensional obtained completely with boundary-layer isolation aerial drainage.Boundary-layer low speed low energy air-flow is discharged while keeping rotating into air flue advantage in three-dimensional, using isolation aerial drainage method in the present invention, to widen the work range of Mach numbers for rotating into air flue in three-dimensional.
Description
Technical field
The present invention relates to air flue boundary-layer aerial drainage technical field is rotated into three-dimensional, and in particular to a kind of isolation of band boundary-layer is let out
Air flue design method is rotated into the three-dimensional of stream.
Background technique
The design and verifying of hypersonic aircraft are the strategic high grounds that each aviation power competitively fights at present, are spaces
One of focus of technical research.World powers is all carrying forward vigorously respective hypersonic flight research plan.
The key for realizing hypersonic flight is the research of airbreathing propulsion system, and the core technology of the system is super burn
Punching engine key technology.Air intake duct is located at the forefront of scramjet engine, plays compression incoming flow, provides to the greatest extent for downstream
The effect of possible more high energy air-flows.Based on the above reasons, domestic and foreign scholars propose a series of compressed format of air intake ducts, mainly
It include: two dimensional inlet, axialsymmetrical inlet, side pressure air intake duct, and with regard to their design method, flow characteristics and working characteristics
Numerous studies are carried out.
In addition, rotating into air flue in three-dimensional since traffic capture coefficient with higher and excellent aeroperformance are by the country
The extensive concern of outer scholar and research.The streamlined impeller Busemann air inlet of the propositions such as Johns Hopkins University, U.S. Billig
Road [1], the Funnel air intake duct [2] of the propositions such as Ajay of Astrox company, the U.S., the Smart at U.S. spaceflight aerospace research center
Air flue etc. is rotated into the three-dimensional that rectangular inlet is switched to ellipse outlet [3] of equal propositions.At home, prolong tomahawk etc. especially and propose one
Kind, which is referred to as in the three-dimensional of interior rider formula, rotates into air flue design method.Although such air intake duct has certain in terms of aeroperformance
Advantage, but high traffic capture ability simultaneously will increase low mach starting burden, the work to hypersonic aircraft
Fast domain generates strong influence.Therefore, how research widens the working range that air flue is rotated into three-dimensional, reduces in three-dimensional and rotates into gas
The Start mach number in road is extremely important to the development of such air intake duct.
To widen the working range for rotating into air flue in three-dimensional, its Start mach number is reduced, domestic and foreign scholars use at present
Flowing control including becoming geometric method with determining geometrical condition is these two types of.Becoming geometric method is to be compressed according to free stream Mach number to air intake duct
Type face is adjusted, and adjusts air intake duct contract ratio with this.The method is wider in the simple two dimensional inlet field application of structure,
But excessively complicated due to rotating into air flue type face in three-dimensional, the method can not effectively improve the starting capability of air intake duct.
Determine the flowing control under geometrical condition, relatively common is boundary layer suction aerial drainage.To in low mach operating condition
The low speed low energy stream in air intake duct can be excluded down, to realize that air intake duct is normal under low mach.However, suction aerial drainage
There are a prominent questions: due to the presence of relief port, aerial drainage shock wave will additionally be generated by rotating into three-dimensional in air flue, lead to gas
Stream loss increases, and furthermore the shock wave is possible to that additional boundary-layer is caused to separate with Boundary Layer Interaction, introduces and new does not rise
Reason element.The starting capability of air flue is rotated into three-dimensional to open up to improving it can be seen that providing effective boundary-layer aerial drainage technology
The working range of wide scramjet engine is of great significance.
Summary of the invention
Problem to be solved by this invention is: provide it is a kind of with boundary-layer isolation aerial drainage three-dimensional in rotate into air flue design side
While keeping rotating into air flue advantage in three-dimensional boundary-layer low speed low energy air-flow is discharged using isolation aerial drainage method, to open up in method
The work range of Mach numbers of air flue is rotated into wide three-dimensional.
The present invention in order to solve the above problem provided by technical solution are as follows: it is a kind of with boundary-layer isolation aerial drainage three-dimensional in turn
Design of Inlet method, the described method comprises the following steps,
(1) it generates in three-dimensional and rotates into air flue；
(2) it chooses the position in isolation aerial drainage section and calculates the displacement thickness for rotating into air flue boundary-layer in the section in three-dimensional
Degree；
(3) displacement thickness of air flue boundary-layer, design isolation aerial drainage dress are rotated into the three-dimensional according to obtained in step (2)
It sets；
(4) the import of discharge device mainstream to be isolated obtained in step (3), straight stretch backward is waited to obtain discharge device isolation
Section, final obtain in the three-dimensional that aerial drainage is completely isolated with boundary-layer rotate into air flue.
Preferably, the positive shape that air flue shoulder molded line is rotated into three-dimensional is designed as circle in the step (1), in axis
Streamlined impeller is carried out in symmetrical contract flow field, is circumferentially arranged gained streamline progress three-dimensional to obtain stream interface, which is three
Air flue compression-type face is rotated into dimension, air flue shoulder will be rotated into three-dimensional, and equal vertical pullings are stretched to obtain in three-dimensional and rotate into air flue isolation backward
Section.
Preferably, isolation aerial drainage section is arranged in three-dimensional and rotates into air flue throatpiston downstream in the step (2)；It is selected
After aerial drainage section is isolated, according to boundary-layer displacement thickness formulaIt is calculated in three-dimensional that rotate into air flue attached
The displacement thickness of surface layer.
Preferably, isolation discharge device includes isolation discharge device mainstream import, isolation discharge device in the step (3)
Boundary-layer outlet and boundary-layer current by pass；Wherein isolation discharge device mainstream import is by rotating into air flue throatpiston in three-dimensional
It subtracts isolation vent area to obtain, the import of boundary-layer current by pass is overlapped with vent area is isolated, and the attached face of discharge device is isolated
Layer outlet is arranged in the three-dimensional with boundary-layer isolation aerial drainage and rotates into air flue two sides, and discharge device wall surface molded line is isolated by 3 samples
Curve matching generates.
Compared with prior art, the invention has the advantages that the band boundary-layer that the present invention is generated using the design method is isolated
Air flue is rotated into the three-dimensional of aerial drainage can significantly widening, air flue working range is rotated into three-dimensional.Using pass through boundary-layer displacement thickness
Calculating the isolation discharge device for designing and obtaining can be completely isolated by the three-dimensional circumferential boundary-layer in air intake duct compression-type face and by letting out
Circulation road is discharged inside air intake duct, and will not additionally introduce aerial drainage shock wave, while reducing intake duct starting Mach number, guarantees
The aeroperformance of air flue is rotated into three-dimensional.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes a part of the invention, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.
Fig. 1 is to rotate into air flue general structure schematic diagram in the three-dimensional with boundary-layer isolation aerial drainage.
Fig. 2 is to rotate into air flue cross-sectional view in the three-dimensional with boundary-layer isolation aerial drainage.
Fig. 3 is to rotate into air flue bottom view in the three-dimensional with boundary-layer isolation aerial drainage.
Fig. 4 is to rotate into air flue front view in the three-dimensional with boundary-layer isolation aerial drainage.
Fig. 5 is to rotate into air flue external structure schematic diagram in the three-dimensional with boundary-layer isolation aerial drainage.
Label in figure are as follows: 1 indicate hypersonic incoming flow, 2 indicate to rotate into three-dimensional air flue, 3 indicate isolation discharge devices,
4 expression discharge device distance pieces, 5 indicate three-dimensional in rotate into air flue shoulder molded line, 6 indicate three-dimensional in rotate into air flue compression-type face, 7
Indicate three-dimensional in rotate into tracheal entrance molded line, 8 indicate three-dimensional in rotate into air flue distance piece, 9 indicate isolation aerial drainage sections, 10 indicate
Rotated into three-dimensional air flue throatpiston, 11 indicate isolation vent areas, 12 indicate isolation the imports of discharge device mainstream, 13 indicate every
Indicate that isolation discharge device wall surface molded line, 16 indicate to let out from the outlet of discharge device boundary-layer, 14 expression boundary-layer current by pass, 15
The outlet of stream device distance piece, 17, which indicate to rotate into three-dimensional in the three-dimensional of air flue boundary-layer, 18 expressions with boundary-layer isolation aerial drainage, to be turned
Air intake duct outer cover.
Specific embodiment
Carry out the embodiment that the present invention will be described in detail below in conjunction with accompanying drawings and embodiments, how the present invention is applied whereby
Technological means solves technical problem and reaches the realization process of technical effect to fully understand and implement.
As shown in Figure 1, this with boundary-layer isolation aerial drainage three-dimensional in rotate into air flue scheme include three-dimensional in rotate into air flue 2,
Discharge device 3 and discharge device distance piece 4 is isolated, wherein rotating into air flue 2 in three-dimensional includes rotating into air flue shoulder molded line in three-dimensional
5, air flue compression-type face 6 is rotated into three-dimensional, is rotated into air flue leading edge molded line 7 and three-dimensional and is rotated into air flue distance piece 8 in three-dimensional；Isolation
Discharge device 3 includes isolation discharge device mainstream import 12, isolation discharge device boundary-layer outlet 13 and boundary-layer current by pass
14.Isolation 11 size of vent area is according to the boundary-layer displacement thickness for rotating into 6 circumferential direction of air flue compression-type face in three-dimensional in the section
It determines；Air flue 2 is rotated into three-dimensional to be generated by streamlined impeller method, and there is interior rider characteristic；According to isolation discharge device mainstream import
12 wait vertical pullings to stretch backward generates discharge device distance piece 4, and obtains discharge device distance piece outlet 16, and length dimension is isolation
8 times of 12 diameter of discharge device mainstream import.
Rotating into the main implementation steps of air flue design method in three-dimensional with boundary-layer isolation aerial drainage includes:
(1) it generates in three-dimensional and rotates into air flue 2.The positive shape that air flue shoulder molded line 5 is rotated into three-dimensional is designed as circle,
Streamlined impeller is carried out in axial symmetry contract flow field, is circumferentially arranged gained streamline progress three-dimensional to obtain stream interface, which is
To rotate into air flue compression-type face 6 in three-dimensional, air flue shoulder 5 will be rotated into three-dimensional, and equal vertical pullings are stretched to obtain and rotate into air flue in three-dimensional backward
Distance piece 8.
(2) it chooses the position in isolation aerial drainage section 9 and calculates the position for rotating into air flue boundary-layer 17 in the three-dimensional in the section
Move thickness.It cause to rotate into the main reason for air flue can not work in three-dimensional to be produced at air flue throatpiston 10 due to rotating into three-dimensional
A large amount of boundary-layer accumulation has been given birth to block runner so as to cause boundary-layer separation.Therefore, isolation aerial drainage section 9 should be arranged in three
10 downstream of air flue throatpiston is rotated into dimension.Behind selected isolation aerial drainage section 9, according to boundary-layer displacement thickness formulaThe displacement thickness for rotating into air flue boundary-layer 17 in three-dimensional is calculated, and determines isolation vent area
11, isolation vent area 11 is identical as the boundary-layer displacement thickness being isolated in aerial drainage section 9.
(3) displacement thickness of air flue boundary-layer 17, design isolation aerial drainage dress are rotated into the three-dimensional according to obtained in step (2)
3 are set, isolation discharge device 3 includes isolation discharge device mainstream import 12, isolation discharge device boundary-layer outlet 13 and boundary-layer
Current by pass 14.Wherein isolation discharge device mainstream import 12 subtracts isolation aerial drainage by rotating into air flue throatpiston 10 in three-dimensional
Region 11 obtains, and the import of boundary-layer current by pass 14 is overlapped with vent area 11 is isolated, to reduce isolation discharge device 3 to whole
Isolation discharge device boundary-layer outlet 13 is arranged in the three-dimensional with boundary-layer isolation aerial drainage and rotates by the influence of body configuration volume
Air flue two sides, isolation discharge device wall surface molded line 15 are generated by 3 spline curve fittings.
(4) discharge device mainstream import 12 to be isolated obtained in step (3), wait it is straight stretch backward obtain discharge device every
From section 4.Acquisition, which can be isolated, excludes boundary-layer low speed low energy air-flow, while it is special not influence flowing of the mainstream air-flow in air intake duct
Air flue is rotated into the three-dimensional with boundary-layer isolation aerial drainage of sign.
This rotates into air flue design method and is keeping rotating into air flue advantage in three-dimensional in three-dimensional with boundary-layer isolation aerial drainage
Meanwhile boundary-layer low speed low energy air-flow is discharged using isolation aerial drainage method, to widen the work Mach number for rotating into air flue in three-dimensional
Range.
The beneficial effects of the present invention are: the present invention is isolated in the three-dimensional of aerial drainage using what the design method generated with boundary-layer
It rotates into air flue and can significantly widen and rotate into air flue working range in three-dimensional.It is obtained using design is calculated by boundary-layer displacement thickness
Isolation discharge device can the three-dimensional circumferential boundary-layer in air intake duct compression-type face is completely isolated and by current by pass be discharged into
Inside air flue, and aerial drainage shock wave will not be additionally introduced, while reducing intake duct starting Mach number, ensure that in three-dimensional and rotate into
The aeroperformance of air flue.
Only highly preferred embodiment of the present invention is described above, but is not to be construed as limiting the scope of the invention.This
Invention is not only limited to above embodiments, and specific structure is allowed to vary.All protection models in independent claims of the present invention
Interior made various change is enclosed to all fall in the scope of protection of the present invention.
Claims (4)
1. it is a kind of with boundary-layer isolation aerial drainage three-dimensional in rotate into air flue design method, it is characterised in that: the method includes with
Lower step,
(1) it generates in three-dimensional and rotates into air flue；
(2) it chooses the position in isolation aerial drainage section and calculates the displacement thickness for rotating into air flue boundary-layer in the section in three-dimensional；
(3) displacement thickness of air flue boundary-layer, design isolation discharge device are rotated into the three-dimensional according to obtained in step (2)；
(4) the import of discharge device mainstream to be isolated obtained in step (3), straight stretch backward is waited to obtain discharge device distance piece,
Air flue is rotated into the final three-dimensional obtained completely with boundary-layer isolation aerial drainage.
2. rotating into air flue design method in the three-dimensional according to claim 1 with boundary-layer isolation aerial drainage, it is characterised in that:
The positive shape that air flue shoulder molded line is rotated into three-dimensional is designed as circle in the step (1), in axial symmetry contract flow field
Middle carry out streamlined impeller is circumferentially arranged gained streamline progress three-dimensional to obtain stream interface, which is to rotate into airway pressure in three-dimensional
Miniature face, air flue shoulder will be rotated into three-dimensional, and equal vertical pullings are stretched to obtain in three-dimensional and rotate into air flue distance piece backward.
3. rotating into air flue design method in the three-dimensional according to claim 1 with boundary-layer isolation aerial drainage, it is characterised in that:
Isolation aerial drainage section, which is arranged in three-dimensional, in the step (2) rotates into air flue throatpiston downstream；Behind selected isolation aerial drainage section,
According to boundary-layer displacement thickness formulaThe displacement thickness that air flue boundary-layer is rotated into three-dimensional is calculated.
4. rotating into air flue design method in the three-dimensional according to claim 1 with boundary-layer isolation aerial drainage, it is characterised in that:
Isolation discharge device includes isolation discharge device mainstream import, isolation discharge device boundary-layer outlet and attached in the step (3)
Surface layer current by pass；Wherein isolation discharge device mainstream import subtracts isolation aerial drainage area by rotating into air flue throatpiston in three-dimensional
Domain obtains, and the import of boundary-layer current by pass is overlapped with vent area is isolated, and the outlet of isolation discharge device boundary-layer is arranged in band
Air flue two sides are rotated into the three-dimensional of boundary-layer isolation aerial drainage, isolation discharge device wall surface molded line is generated by 3 spline curve fittings.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910450499.9A CN110175408A (en) | 2019-05-24 | 2019-05-24 | Air flue design method is rotated into three-dimensional with boundary-layer isolation aerial drainage |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910450499.9A CN110175408A (en) | 2019-05-24 | 2019-05-24 | Air flue design method is rotated into three-dimensional with boundary-layer isolation aerial drainage |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111412066A (en) * | 2020-04-27 | 2020-07-14 | 南昌航空大学 | Three-dimensional inward rotation air inlet channel with annular self-adaptive drainage tube and design method |
| CN117823281A (en) * | 2024-03-06 | 2024-04-05 | 中国空气动力研究与发展中心空天技术研究所 | Multi-channel wide-speed-range adjustable air inlet channel in delta arrangement |
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| CN104863715A (en) * | 2015-04-16 | 2015-08-26 | 南京航空航天大学 | Binary hypersonic-velocity variable-geometry air inlet way with rectangular inlet, design method thereof and working method thereof |
| CN106250597A (en) * | 2016-07-26 | 2016-12-21 | 厦门大学 | Air flue design method is rotated in a kind of three-dimensional flowing to suction completely |
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2019
- 2019-05-24 CN CN201910450499.9A patent/CN110175408A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104863715A (en) * | 2015-04-16 | 2015-08-26 | 南京航空航天大学 | Binary hypersonic-velocity variable-geometry air inlet way with rectangular inlet, design method thereof and working method thereof |
| CN106250597A (en) * | 2016-07-26 | 2016-12-21 | 厦门大学 | Air flue design method is rotated in a kind of three-dimensional flowing to suction completely |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111412066A (en) * | 2020-04-27 | 2020-07-14 | 南昌航空大学 | Three-dimensional inward rotation air inlet channel with annular self-adaptive drainage tube and design method |
| CN111412066B (en) * | 2020-04-27 | 2023-04-04 | 南昌航空大学 | Three-dimensional inward rotation air inlet channel with annular self-adaptive drainage tube and design method |
| CN117823281A (en) * | 2024-03-06 | 2024-04-05 | 中国空气动力研究与发展中心空天技术研究所 | Multi-channel wide-speed-range adjustable air inlet channel in delta arrangement |
| CN117823281B (en) * | 2024-03-06 | 2024-06-04 | 中国空气动力研究与发展中心空天技术研究所 | Multi-channel wide-speed-range adjustable air inlet channel in delta arrangement |
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