CN106908399B - Multi-light-path optical measurement compression sheet for laminated arc heater - Google Patents
Multi-light-path optical measurement compression sheet for laminated arc heater Download PDFInfo
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- CN106908399B CN106908399B CN201710071309.3A CN201710071309A CN106908399B CN 106908399 B CN106908399 B CN 106908399B CN 201710071309 A CN201710071309 A CN 201710071309A CN 106908399 B CN106908399 B CN 106908399B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/255—Details, e.g. use of specially adapted sources, lighting or optical systems
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N2021/0106—General arrangement of respective parts
- G01N2021/0112—Apparatus in one mechanical, optical or electronic block
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/02—Mechanical
- G01N2201/022—Casings
Abstract
A multi-light path optical measurement compression plate for a laminated arc heater relates to the field of multi-light path optical measurement; the device comprises a disc-shaped optical measurement compression sheet main body and a laser alignment mechanism; a water inlet and a water outlet are respectively arranged along the radial direction of the optical measurement compression sheet main body; two air pipelines are respectively arranged along the radial direction of the optical measurement compression piece main body; uniformly arranging 6 optical measurement channels along the circumferential direction of the optical measurement compression sheet main body; a plurality of positioning and mounting holes are uniformly formed in the optical measurement compression sheet main body along the circumferential direction of the axis; the optical measurement compression piece main body is connected with an external laminated arc heater through a positioning mounting hole; one end of the laser alignment mechanism extends into the optical measurement channel; the other end of the laser alignment mechanism is connected with an external optical element; the problems of high heat load cooling of the wall surface and mutual interference of a multi-light-path optical measurement channel and a cooling water channel are solved, and the multi-light-path construction requirement of laser absorption spectrum diagnosis of the laminated arc heater is met.
Description
Technical Field
The invention relates to the field of multi-light-path optical measurement, in particular to a multi-light-path optical measurement compression plate for a laminated arc heater.
Background
The laminated arc heater, also called a compressed arc heater, has the advantages of high enthalpy, stable operation and the like, and is main test equipment for researching the aerodynamic heat problem of the hypersonic and long-endurance aircraft. Due to the limitations of ground tests, such as the limitation of heater power and spray pipe size, full-size and full-orbit simulation cannot be achieved, the simulation environment provided by the arc heater is different from the real flight environment of the aircraft to a certain extent, however, the method for evaluating the difference is deficient at present, so that the heat-proof design of the aircraft still has a large margin at present, and the excessively conservative aircraft heat protection system not only unnecessarily increases the load of the aircraft and occupies valuable space, but also greatly improves the cost of the flight test of the aircraft. With the development of aerospace industry, people pay more attention to the influence caused by the space-to-ground difference, and the core for solving the problem is to obtain accurate flow field parameters of the arc heater, such as gas flow temperature, component density and the like.
Because the temperature of high-temperature gas in the laminated arc heater is as high as 5000K-9000K, under such a high-temperature environment, plasma flat-rotation-vibration excitation and dissociation and recombination of gas flow components are realized, and the traditional contact type measurement means is difficult to realize accurate quantitative measurement of the high-temperature flow field of the laminated arc heater and cannot meet the current test requirements.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides the multi-light-path optical measurement compression plate for the laminated arc heater, solves the problems of high heat load cooling of the wall surface and mutual interference between a multi-light-path optical measurement channel and a cooling water channel, and meets the multi-light-path construction requirement of laser absorption spectrum diagnosis of the laminated arc heater.
The above purpose of the invention is realized by the following technical scheme:
a multi-light path optical measurement compression plate for a laminated arc heater comprises a disc-shaped optical measurement compression plate body and a laser alignment mechanism; a water inlet and a water outlet are respectively arranged along the radial direction of the optical measurement compression sheet main body; two air pipelines are respectively arranged along the radial direction of the optical measurement compression piece main body, and the connecting line of the two air pipelines passes through the axis of the optical measurement compression piece main body; uniformly arranging 6 optical measurement channels along the circumferential direction of the optical measurement compression sheet main body; n positioning mounting holes are uniformly formed in the optical measurement compression sheet main body along the circumferential direction of the axis, and n is a positive integer not less than 6; the optical measurement compression piece main body is connected with an external laminated arc heater through a positioning mounting hole; one end of the laser alignment mechanism extends into the optical measurement channel; the other end of the laser alignment mechanism is connected with an external optical element through an external O-shaped sealing ring and external quartz glass.
In the above multi-light path optical measurement compression plate for the laminated arc heater, the main body of the disk-shaped optical measurement compression plate is made of red copper material.
In the above multi-light-path optical measurement compression plate for the laminated arc heater, the water inlet and the water outlet are both located in the axial middle of the optical measurement compression plate main body, and a connecting line of the axes of the water inlet and the water outlet passes through the axis of the optical measurement compression plate main body.
In the above-mentioned multi-light path optical measurement compression piece for the laminated arc heater, the optical measurement compression piece main body is axially provided with a through hole; one end of the air pipeline is communicated with the outside of the optical measurement compression sheet main body, and the other end of the air pipeline is communicated with the inner wall of the through hole; one end of the optical measurement channel is communicated with the outside of the optical measurement compression sheet main body, and the other end of the optical measurement channel is communicated with the inner wall of the through hole; the air pipeline and the optical measurement channel are both positioned in the axial middle of the optical measurement compression piece main body.
In the multi-light-path optical measurement compression piece for the laminated arc heater, the axial thickness of the optical measurement compression piece main body is 40-45 mm.
In the multi-light-path optical measurement compression piece for the laminated arc heater, two layers of cooling water channels are respectively arranged along the axial direction of the optical measurement compression piece main body; the two layers of cooling water channels are symmetrically distributed on two sides of the plane where the water inlet and the water outlet are located.
In the above multi-light-path optical measurement compression plate for the laminated arc heater, one end of the water inlet and one end of the water outlet are respectively communicated with the two layers of cooling water channels.
In the multi-light-path optical measurement compression sheet for the laminated arc heater, each layer of cooling water channel is formed by connecting 6-8 sections of counter bores end to form an equilateral polygon structure symmetrically surrounding an axial through hole of an optical measurement compression sheet main body; and the minimum clearance between the section counter bore and the optical measurement compression sheet main body through hole is 3 mm.
In the multi-light-path optical measurement compression piece for the laminated arc heater, a pair of counter bores in the diagonal direction are reserved to be communicated with the water inlet and the water outlet, and the rest of the counter bores are blocked.
Compared with the prior art, the invention has the following advantages:
(1) the multi-light-path optical measurement compression piece adopts the interval layered structure that the upper layer and the lower layer are provided with the cooling water channels and the middle layer is provided with the optical measurement channel, thereby not only meeting the requirement of heat protection, but also avoiding the mutual interference of the cooling water channels and the optical measurement channel, further arranging multiple measuring light paths in a narrow space and greatly improving the spatial resolution of the laser absorption spectrum technology applied to the measurement of the laminated arc heater;
(2) the multi-light-path optical measurement compression sheet adopts a red copper material with better heat conductivity, and has better heat conductivity;
(3) the cooling water channels of the multi-light-path optical measurement compression plate are six sections of counter bores which are connected end to form a hexagonal structure which is approximately circumscribed on the inner diameter of the compression plate, and the two cooling water channels use the same cooling water inlet and outlet, so that the processing and assembling process is simple;
(4) the cooling water channel and the optical measurement channel of the multi-light-path optical measurement compression plate are of an integrated structure, and the multi-light-path optical measurement compression plate has higher mechanical strength and shockproof property.
Drawings
FIG. 1 is a cross-sectional view of the center of the axis of an optically measured compression piece of the present invention;
FIG. 2 is a cross-sectional view of a dual-layer cooling channel of the present invention;
FIG. 3 is a laser alignment mechanism of the present invention in cooperation with an optical measurement channel.
Detailed Description
The invention is described in further detail below with reference to the following figures and specific examples:
as shown in fig. 1, which is a cross-sectional view of the middle of the axis of an optical measurement compression piece, it can be seen that a multi-light path optical measurement compression piece for a laminated arc heater comprises a disc-shaped optical measurement compression piece body 1 and a laser alignment mechanism 7; as can be seen from the section view B-B, a water inlet 2a and a water outlet 2B are respectively arranged along the radial direction of the optical measurement compression sheet main body 1; two air pipelines 4 are respectively arranged along the radial direction of the optical measurement compression piece main body 1, and the connecting line of the two air pipelines 4 passes through the axis of the optical measurement compression piece main body 1; the air pipeline 4 is externally connected with an air inlet pipe to form an independent air inlet system; 6 optical measurement channels 5 are uniformly arranged along the circumferential direction of the optical measurement compression sheet main body 1; n positioning mounting holes 6 are uniformly formed in the optical measurement compression sheet main body 1 along the circumferential direction of the axis, and n is a positive integer not less than 6; the optical measurement compression piece main body 1 is connected with an external laminated arc heater through a positioning mounting hole 6; the number and the position size of the positioning and mounting holes 6 are determined by the size of the compression plate structure of the provided laminated arc heater.
In order to meet the requirements of strength and heat resistance, the disc-shaped optical measurement compression piece main body 1 is made of red copper material; the axial thickness of the optical measurement compression sheet main body 1 is 40-45 mm.
The water inlet 2a and the water outlet 2b are both positioned in the axial middle of the optical measurement compression sheet main body 1, and a connecting line of the axes of the water inlet 2a and the water outlet 2b passes through the axis of the optical measurement compression sheet main body 1; and the optical measurement compression sheet main body 1 is axially provided with a through hole; one end of the air pipeline 4 is communicated with the outside of the optical measurement compression sheet main body 1, and the other end of the air pipeline is communicated with the inner wall of the through hole; one end of the optical measurement channel 5 is communicated with the outside of the optical measurement compression sheet main body 1, and the other end is communicated with the inner wall of the through hole; the air duct 4 and the optical measurement channel 5 are both located in the axial middle of the optical measurement compression piece main body 1.
As shown in fig. 3, the laser alignment mechanism is adapted to the optical measurement channel, and as shown in the figure, one end of the laser alignment mechanism 7 extends into the optical measurement channel 5; the other end of the laser collimation mechanism 7 is connected with an external optical element 10 through an external O-shaped sealing ring 8 and external quartz glass 9; wherein the outer O-ring 8 and the outer quartz glass 9 prevent the high temperature gas from leaking out. Enough space is reserved at the right end for installing optical elements such as lenses, optical fibers, filters and the like to realize laser focusing and collimation.
As shown in fig. 2, which is a cross-sectional view of a double-layer cooling water channel, it can be seen that two layers of cooling water channels 3 with a C-C section and a D-D section are respectively disposed along the axial direction of the optical measurement compression piece main body 1; the two layers of cooling water channels 3 on the C-C section and the D-D section are completely the same, and the two layers of cooling water channels 3 are symmetrically distributed on two sides of the plane where the water inlet 2a and the water outlet 2b are located.
As can be seen from the section A-A, one ends of the water inlet 2a and the water outlet 2b are respectively communicated with the two layers of cooling water channels 3.
Each layer of cooling water channel 3 is formed by connecting 6-8 sections of counter bores end to form an equilateral polygon structure which radially and symmetrically surrounds the axial through hole of the optical measurement compression sheet main body 1; and the minimum clearance between the section counter bore and the through hole of the optical measurement compression sheet main body 1 is 3mm, so that the best cooling effect is ensured.
In the measuring process, a pair of counter bores along the diagonal direction are reserved to be communicated with the water inlet 2a and the water outlet 2b, and the rest counter bores are blocked.
Those skilled in the art will appreciate that those matters not described in detail in the present specification are well known in the art.
Claims (5)
1. A multi-optical path optical measurement compression plate for a laminated arc heater, characterized by: comprises a disc-shaped optical measurement compression sheet main body (1) and a laser alignment mechanism (7); a water inlet (2a) and a water outlet (2b) are respectively arranged along the radial direction of the optical measurement compression sheet main body (1); two air pipelines (4) are respectively arranged along the radial direction of the optical measurement compression piece main body (1), and the connecting line of the two air pipelines (4) passes through the axis of the optical measurement compression piece main body (1); 6 optical measurement channels (5) are uniformly arranged along the circumferential direction of the optical measurement compression sheet main body (1); n positioning mounting holes (6) are uniformly formed in the optical measurement compression sheet main body (1) along the circumferential direction of the axis, and n is a positive integer not less than 6; the optical measurement compression piece main body (1) is connected with an external laminated arc heater through a positioning mounting hole (6); one end of the laser collimation mechanism (7) extends into the optical measurement channel (5); the other end of the laser alignment mechanism (7) is connected with an external optical element (10) through an external O-shaped sealing ring (8) and external quartz glass (9);
the water inlet (2a) and the water outlet (2b) are both positioned in the axial middle of the optical measurement compression sheet main body (1), and a connecting line of the axes of the water inlet (2a) and the water outlet (2b) passes through the axis of the optical measurement compression sheet main body (1);
the optical measurement compression sheet main body (1) is axially provided with a through hole; one end of the air pipeline (4) is communicated with the outside of the optical measurement compression sheet main body (1), and the other end of the air pipeline is communicated with the inner wall of the through hole; one end of the optical measurement channel (5) is communicated with the outside of the optical measurement compression sheet main body (1), and the other end of the optical measurement channel is communicated with the inner wall of the through hole; the air pipeline (4) and the optical measurement channel (5) are both positioned in the axial middle part of the optical measurement compression sheet main body (1);
two layers of cooling water channels (3) are respectively arranged along the axial direction of the optical measurement compression piece main body (1); the two layers of cooling water channels (3) are symmetrically distributed on two sides of the plane where the water inlet (2a) and the water outlet (2b) are located;
one end of the water inlet (2a) and one end of the water outlet (2b) are respectively communicated with the two layers of cooling water channels (3).
2. A multi-optical path optical measurement compression plate for a laminated arc heater in accordance with claim 1, wherein: the disc-shaped optical measurement compression piece main body (1) is made of red copper materials.
3. A multi-optical path optical measurement compression plate for a laminated arc heater in accordance with claim 2, wherein: the axial thickness of the optical measurement compression sheet main body (1) is 40-45 mm.
4. A multi-optical path optical measurement compression plate for a laminated arc heater in accordance with claim 3, wherein: each layer of cooling water channel (3) is formed by connecting 6-8 sections of counter bores end to form an equilateral polygon structure which symmetrically surrounds the axial through hole of the optical measurement compression sheet main body (1); and the minimum clearance between each section of counter bore and the through hole of the optical measurement compression sheet main body (1) is 3 mm.
5. The multi-optical path optical measurement compression plate for a laminated arc heater of claim 4, wherein: in the measuring process, a pair of counter bores along the diagonal direction are reserved to be communicated with the water inlet (2a) and the water outlet (2b), and the rest counter bores are blocked.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710071309.3A CN106908399B (en) | 2017-02-09 | 2017-02-09 | Multi-light-path optical measurement compression sheet for laminated arc heater |
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| CN201710071309.3A CN106908399B (en) | 2017-02-09 | 2017-02-09 | Multi-light-path optical measurement compression sheet for laminated arc heater |
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| CN106908399B true CN106908399B (en) | 2020-02-14 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109348563B (en) * | 2018-10-30 | 2024-02-09 | 中国航天空气动力技术研究院 | High-pressure high-enthalpy arc heater |
| CN109883965A (en) * | 2019-01-25 | 2019-06-14 | 北京航天计量测试技术研究所 | It is a kind of for high temperature, the synthesis gas component detection device of hyperbaric environment |
| CN110207906B (en) * | 2019-05-31 | 2021-04-13 | 中国航天空气动力技术研究院 | Variable-parameter electric arc heater track test water leakage diagnosis system |
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| US6904226B2 (en) * | 2001-03-16 | 2005-06-07 | David A. Kritler | Apparatus and method for preparing a coated optical fiber |
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| JPS5890150A (en) * | 1981-11-25 | 1983-05-28 | Nippon Steel Corp | Emission spectrochemical analyzing method for plasma arc directly molten small size group sample and device thereof |
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