CN100385216C - Interfere reduced enthalpy probe for measuring jet parameters of fluid at superhigh temperature - Google Patents
Interfere reduced enthalpy probe for measuring jet parameters of fluid at superhigh temperature Download PDFInfo
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- CN100385216C CN100385216C CNB2004100745330A CN200410074533A CN100385216C CN 100385216 C CN100385216 C CN 100385216C CN B2004100745330 A CNB2004100745330 A CN B2004100745330A CN 200410074533 A CN200410074533 A CN 200410074533A CN 100385216 C CN100385216 C CN 100385216C
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Abstract
The present invention relates to an interference reducing enthalpy probe for measuring jet parameters of superhigh temperature flow air, which comprises an outer pipe of a probe rod, wherein an inner pipe of the probe is sheathed in the outer pipe of a probe rod, and a water inlet and outlet separation pipe is inserted between the outer pipe of a probe rod and the inner pipe of the probe; the three pipes are arranged in a coaxial mode. The head of the outer pipe of a probe rod is provided with a demountable conical shell head cover of which the centre is provided with a round hole, and the conical shell head cover and the inner pipe of the probe are matched by screw threads. The head of the water inlet and outlet separation pipe forms a conical shape. By using the conical probe, the interference to the jet air in the measuring process is reduced, and the measuring accuracy is increased. A cooling water passage of the rod body of the probe can be enlarged properly under the same measuring effect, and a high-pressure water pump and a relevant mechanism are saved.
Description
Technical field
The present invention relates to a kind of probe that is used to measure temperature, speed, component and the distribution thereof of superhigh temperature flowing gas jet, particularly relate to a kind of interfere reduced enthalpy probe that is used to measure temperature, speed, component and the distribution thereof of superhigh temperature flowing gas jet.
Background technology
At the hot plasma of Aero-Space, machining, metallurgy, chemical industry and bioengineering field widespread use, its gas temperature is generally at 3000-20000K, and the used thermopair of conventional thermometric can't use in this case.Under the condition of this superhigh temperature, difference according to pressure, temperature and the gaseous species of gas, its degree of ionization and the population density that is in various excited state also respective change, therefore, to the temperature survey of this plasma jet, often adopt the method for spectroscopic diagnostics to measure its gas temperature and distribution.Spectral measurement method is contactless, by spectral line that detects certain feature that high-temperature gas sends and the temperature that intensity derives gas thereof, gas jet itself is not produced any external disturbance.But the method general device of spectral measurement is relatively more expensive, the special knowledge that needs the more complicated profundity, and the state to measurand has a lot of qualifications, for example: optically thin, rotational symmetry, be in local thermodynamic equilibrium state or the like, if do not satisfy these requirements, the error that the difficulty of measurement will increase, obtain the result greatly is also very big, yet, actual superhigh temperature partial ionized gas jet all departs from these requirements to some extent, therefore, is difficult to judge the accuracy of measurement result.
The water-cooled enthalpy probe is the means of another kind of commonly used measurement superhigh temperature gas temperature, and the structure of this class enthalpy probe roughly has two kinds, a kind of be the probe body of rod across gas flow direction, and have an aperture at body of rod center, make the incoming flow of perforate in face of the measured point; Another kind is to have an aperture in the termination of probe rod, and directly to coming flow path direction, the body of rod is then placed along gas flow direction in the termination.Probe measurement disturbance to air-flow under the situation in same bar footpath across airflow direction is bigger, and along or perpendicular to the disturbance difference of body of rod direction to air-flow, therefore, actual use is that the termination is directly to coming the shaft-like enthalpy probe of flow path direction basically now, document 1.J.Grey for example, Cooled electrostatic probes, ibid., the enthalpy probe of being introduced among the Chapter 6,1976.So that probe bearing integral body is made integrative-structure, end of probe is circular to this enthalpy probe from the shaft of popping one's head in, and there is the very little hole of a diameter at the center, the exhaust system of leading to the rear end, air hole periphery water-cooled; In order to measure very high gas temperature, enthalpy probe needs good cooling effect, and chilled water must flow through near the termination, and can not form the dead band of current in termination portion, otherwise probe will be burnt out; And in order to reduce the disturbance to tested air-flow, should reduce to pop one's head in and the size of probe rod, so the probe interior waterway channel be very little as far as possible, needs to adopt high-pressure hydraulic pump, the pressure of water inlet is increased to more than 50 kg/cm, improve discharge with this and guarantee cooling effect; Because the probe rod that general process technology can be made directly is difficult to less than 5mm, simultaneously, probe inserts the position of required measurement during measurement, thereby inevitably will be to the mobile generation disturbance of the tested gas of high temperature self; Reducing probe size is the most effectual way that reduces disturbance, yet special process technology will make the price surge of probe, and general demander can't be born; Present in addition enthalpy probe all is an one-piece construction, the maximum temperature of plasma jet often surpasses 10,000 degree, particularly when having added the high gas of thermal conductivities such as hydrogen in the Gas Jet, and measurable scope of probe is roughly at thousands of degree, the trial of higher temperature scope needs SC, otherwise end of probe may be caused probe integral body to be scrapped by scaling loss.This more makes general user be difficult to accept, and has also limited the trial to the actual usable range of probe.
Summary of the invention
The objective of the invention is to overcome the defective of above-mentioned prior art; In order to reduce manufacturing cost, improve result of use, to enlarge usable range; The enthalpy probe of a kind of taper and interchangeable connector portions is provided, is used to measure the temperature of superhigh temperature flowing gas jet and the parameter of distribution thereof, under simplifying the situation of cooling water system, reducing to measure to the enthalpy probe of the disturbance of gas flow.
A kind of interfere reduced enthalpy probe that jet parameters of fluid at superhigh temperature is used that is used to measure provided by the invention, comprise a probe rod outer tube 6, be inserted in pipe 2 in the probe within it, in probe rod outer tube 6 and probe, insert an Inlet and outlet water separator tube 4 between the pipe 2, three coaxial installations of pipe, form aquaporin 5 between the pipe 2 in described probe rod outer tube 6 and the probe, form intake tunnel 3 in the probe between pipe 2 and the Inlet and outlet water separator tube 4; It is characterized in that: also comprise a conical shell head-shield 7, be threaded engagement between described conical shell head-shield 7 and probe rod outer tube 6 heads, and have circular hole 8 that described circular hole 8 apertures are for being 0.3-0.8mm at conical shell head-shield 7 centers; Described Inlet and outlet water separator tube 4 is a pipe that head is tapered, its taper is bored from the extension position change identical with conical shell head-shield 7 junctions with probe rod outer tube 6 of this pipe, and the distance at the top of this Inlet and outlet water separator tube 4 and conical shell head-shield 7 inwall steps 10 places is 1.3mm; Spacing in the described probe rod outer tube 6, probe between pipe 2 and the Inlet and outlet water separator tube 4 is deferred to the cross-sectional area principle of identity of exhalant canal 5 and intake tunnel 3, determines with the identical principle of assurance water flux density.
In above-mentioned technical scheme, the range of taper of described conical shell head-shield 7 is 8 °-90 °.
In above-mentioned technical scheme, the pore size of described conical shell head-shield 7 center holes 8 according to the different measuring requirement to spatial resolution, is selected different center probe bore size; The pore diameter range of preferred conical shell head-shield 7 center holes 8 is 0.3-0.8mm, guarantees that measurement result has higher spatial resolution and measures sensitivity.
In above-mentioned technical scheme, the tapering of described Inlet and outlet water separator tube 4 its conical noses is less than the inwall tapering of conical shell head-shield 7.
In above-mentioned technical scheme, pipe is selected the moulding copper tube for use in the described probe, and wall thickness only is 0.15mm, can guarantee good heat-conducting.
In above-mentioned technical scheme, the outer length of tube of described probe rod can be accomplished 50mm, to reduce the disturbance to jet.
Characteristics of the present invention are:
1) but the conical head enthalpy probe of changing-over of the present invention design, the head shell of this probe is a taper clamshell that can separate with the probe body of rod, it can be regarded as easily changeable expendable part.According to different measuring requirement to spatial resolution, select different center probe bore size, when unexpected maloperation or gas temperature are crossed high factor and are caused the end of probe shell to ablate, this conical shell of changing-over function that can return to normal condition fully only.Therefore, can make two bites at a cherry and conservatively dwindle its usable range, can not cause big loss because probe burns out also.
2) pipe 2, Inlet and outlet water separator tube 4, probe rod outer tube 6 have adopted the shaping thin walled tube in the probe of the probe body of rod of the present invention, probe shaft outside dimension is reduced under the situation of 4mm, sufficient cooling water channel passage is arranged, therefore measuring system does not need to adopt high-pressure hydraulic pump as shown in Figure 2, be can operate as normal under the condition of 4 kg/cm at water inlet pressure, be used to measure temperature and popped one's head in not by scaling loss up to the straight argon plasma jet of 15000K.At probe shaft outside dimension is under the situation of 4mm, and the not slick and sly diameter 9 of the conehead of conical shell head-shield 7 can be accomplished 1.5mm, again through slyness processing, can reduce the disturbance to detected fluid very effectively when measuring, thus the accuracy that improves measurement result.
Description of drawings
Fig. 1 is the assembling assumption diagram of conical probe clamshell and probe rod coupling part.
Fig. 2 is the work system synoptic diagram that makes up with designed probe of the present invention.
Embodiment
With reference to Fig. 1, make one and measure the interfere reduced enthalpy probe that jet parameters of fluid at superhigh temperature is used, among the figure: gas circuit-1, probe inner tubal wall-2, chilled water intake tunnel-3, Inlet and outlet water separator tube-4, exhalant canal-5, probe rod outer tube-6, conical shell head-shield-7, end air inlet perforate-8, circular hole-9, step-10.
Adopt about 0.5mm of commercially available wall thickness or 1.0mm copper tube as probe rod outer tube 6, the outer length of tube of described probe rod can be accomplished 50mm, to reduce the disturbance to jet.Pipe 2 thickness are 0.15mm in the probe, and the thickness of Inlet and outlet water separator tube 4 is 0.2mm.This red copper probe rod outer tube 6 is inserted in pipe 2 in the probe within it, inserts 4, three coaxial installations of pipe of an Inlet and outlet water separator tube in probe rod outer tube 6 and probe between the pipe 2.Described probe rod outer tube 6 heads are installed a dismountable conical shell head-shield 7, the range of taper that conical shell head-shield 7 can be accomplished is 8 °-90 ° and all can, conical shell head-shield 7 centers have circular hole 8, are threaded engagement between the pipe 2 in conical shell head-shield 7 and the probe.This Inlet and outlet water separator tube 4 is a pipe that head is tapered, and its taper is bored from the extension position change identical with conical shell head-shield 7 junctions with probe rod outer tube 6 of this pipe, and tapering is littler than the tapering of conical shell head-shield 7 inwalls; The distance at the top of Inlet and outlet water separator tube 4 and conical shell head-shield 7 inwall steps 10 places is 1.3mm; Guaranteeing that probe has under the prerequisite of sufficient cooling water channel passage, probe rod outside dimension minimum can be accomplished 4mm.Conical shell head-shield 7 and the separable mounting or dismounting of probe shaft, the not slick and sly diameter 9 of the conehead of conical shell head-shield 7 can be accomplished 1.5mm, again through slyness processing, can reduce the disturbance to detected fluid very effectively when measuring.Simultaneously, because conical shell head-shield 7 is detachable, it can make different taperings, studies the level of disruption of different taperings to jet, and then to the influence of measurement result.End air inlet perforate 8 can be selected different sizes according to the Temperature Distribution gradient of measurand, that is: when the thermograde of the orthogonal directions of gas streamline was not too big, bore size can suitably be selected bigger.Flow when bleeding can be greatly like this, to improve the sensitivity of measuring; But when thermograde was very big, opening size was as best one can little, to guarantee measurement spatial resolution.The bore size scope of this enthalpy probe is 0.3mm-0.8mm.Probe rod outer tube 6, the interior pipe 2 of probe are deferred to the identical principle of discharge with the distance between the Inlet and outlet water separator tube 4 and are determined that the distance range between them is 0.5-1.0mm in the present embodiment.And form aquaporin 5 between the pipe 2 in probe rod outer tube 6 and the probe, form chilled water intake tunnel 3 in the probe between pipe 2 and the Inlet and outlet water separator tube 4.
The end of probe of present embodiment adopts conical design, can reduce effectively in measuring process the disturbance of flowing gas and the accuracy that improves measurement result, particularly be applicable in the Temperature Distribution gradient of the orthogonal directions of gas streamline big, and the high flow field temperature of gas velocity and the measurement of distribution thereof.In addition, conical nose be one can with the probe rod status from or the profile of assembling be the clamshell exchangeable part of taper, can require to select the most advanced and sophisticated center drilling size of different taper clamshells according to the actual conditions of measured gas and measuring accuracy; When need inquiring into cone angle to the disturbing influence of gas flow, but the various different cone angle clamshells of changing-over are under the situation of 4mm at probe shaft outside dimension, and the not slick and sly diameter of the conehead of conical shell head-shield can be accomplished 1.5mm, through slyness processing, can reduce disturbance very effectively to detected fluid; When causing serious ablation of probe or scaling loss under the situations such as gas temperature is too high, thermal conductivity good, maloperation, can avoid probe integral body to scrap, only change probing shell and can recover functions of use fully.
Described probe shaft outside dimension is reduced under the situation of 4mm, also has sufficient cooling water channel passage, system does not need high-pressure hydraulic pump and associated mechanisms, and only need general water-cooling system, be can operate as normal under the condition of 4 kg/cm at water inlet pressure, measure temperature and pop one's head in not by scaling loss up to the straight argon plasma jet of 15000K.
With reference to Fig. 2, the using method of the interfere reduced enthalpy probe that present embodiment is made, among the figure: probe rod outer tube-6, the conical shell head-shield-7 of probe, probe bearing-10, measure the thermopair-11 of coolant-temperature gage, measure the thermopair-12 of inflow temperature, water ga(u)ge-13, water valve-14, cooling water inlet pipe-15, cooling water outlet pipe-16, stagnation pressure measuring instrument-17, the gas threeway is selected to stop valve-18, gas sampling district-19, gas passage variable valve-20, gas meter-21, off-gas pump-22, gas outlet-23, tested gas jet-24.
The measuring principle of gas temperature is identical with general similar enthalpy probe, to insert the position that needs to measure temperature in the jet 24 by the probe conical shell head-shield part 7 that probe bearing 10 and probe rod outer tube 6 support, the local flow direction that makes air-flow is over against the center probe air hole, at first by the path of gas threeway choosing to stop valve 18 blocking-up gas circuits 1 and off-gas pump 22, simultaneously respectively by the water outlet in thermopair 11 and 12 real-time measurement cooling water outlet pipes 16 and the cooling water inlet pipe 15 and the temperature of water inlet, (can be adjusted to suitable flow to discharge by water ga(u)ge 13 record discharges by water valve 14, water temperature changes to guarantee measuring significantly by thermopair), the enthalpy of deriving chilled water according to the temperature difference and the flow of water outlet and water inlet changes a, and then open gas threeway choosing to stop valve 18, the path of conducting gas circuit 1 and off-gas pump 22, flow by gas meter 11 pilot-gas, to guarantee to jet influence on flow field minimum, record the enthalpy variation b of chilled water in this case equally, obtain the Gas Jet temperature of position, center probe hole by the difference of b and a; Under the situation of the path of blocking gas circuit 1 and off-gas pump 22, can record the stagnation pressure of the Gas Jet of position, center probe hole by measuring cell 17; Under the situation of conducting pore 1 and the path of off-gas pump 22, can be in the gas sampling district 19 to gather gases used for constituent analyses, residual gas enters in the atmosphere by gas outlet 23.
Claims (6)
1. one kind is used to measure the interfere reduced enthalpy probe that jet parameters of fluid at superhigh temperature is used, comprise a probe rod outer tube (6), be inserted in pipe (2) in the probe within it, in probe rod outer tube (6) and probe, insert an Inlet and outlet water separator tube (4) between the pipe (2), three coaxial installations of pipe, form aquaporin (5) between the pipe (2) in described probe rod outer tube (6) and the probe, form intake tunnel (3) between pipe (2) and the Inlet and outlet water separator tube (4) in the probe; It is characterized in that: also comprise a conical shell head-shield (7), between described conical shell head-shield (7) and probe rod outer tube (6) head is threaded engagement, and having circular hole (8) at conical shell head-shield (7) center, described circular hole (8) aperture is 0.3-0.8mm; Described Inlet and outlet water separator tube (4) is a pipe that head is tapered, its taper becomes awl from this pipe extension position identical with conical shell head-shield (7) junction with probe rod outer tube (6), and the distance that the top of this Inlet and outlet water separator tube (4) and conical shell head-shield (7) inwall step (10) are located is 1.3mm; Manage the spacing between (2) and the Inlet and outlet water separator tube (4) in described probe rod outer tube (6), the probe, defer to the cross-sectional area principle of identity of exhalant canal (5) and intake tunnel (3).
2. measure the interfere reduced enthalpy probe that jet parameters of fluid at superhigh temperature is used by claim 1 described being used to, it is characterized in that: the range of taper of described conical shell head-shield (7) is 8 °-90 °.
3. measure the interfere reduced enthalpy probe that jet parameters of fluid at superhigh temperature is used by claim 1 described being used to, it is characterized in that: the conehead of described conical shell head-shield also comprises through slyness to be processed.
4. measure the interfere reduced enthalpy probe that jet parameters of fluid at superhigh temperature is used by claim 1 described being used to, it is characterized in that: the distance range in described probe rod outer tube (6), the probe between pipe (2) and the Inlet and outlet water separator tube (4) is 0.5-1.0mm.
5. measure the interfere reduced enthalpy probe that jet parameters of fluid at superhigh temperature is used by claim 1 described being used to, it is characterized in that: the tapering of its conical nose of described Inlet and outlet water separator tube (4) is less than the inwall tapering of conical shell head-shield (7).
6. be used to measure the interfere reduced enthalpy probe that jet parameters of fluid at superhigh temperature is used by claim 1 is described, it is characterized in that: the wall thickness of described probe rod outer tube (6) is 0.5mm or 1.0mm, pipe (2) wall thickness is 0.15mm in the described probe, and the wall thickness of described Inlet and outlet water separator tube (4) is 0.2mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100745330A CN100385216C (en) | 2004-09-07 | 2004-09-07 | Interfere reduced enthalpy probe for measuring jet parameters of fluid at superhigh temperature |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100745330A CN100385216C (en) | 2004-09-07 | 2004-09-07 | Interfere reduced enthalpy probe for measuring jet parameters of fluid at superhigh temperature |
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| Publication Number | Publication Date |
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| CN1746640A CN1746640A (en) | 2006-03-15 |
| CN100385216C true CN100385216C (en) | 2008-04-30 |
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| CNB2004100745330A Expired - Fee Related CN100385216C (en) | 2004-09-07 | 2004-09-07 | Interfere reduced enthalpy probe for measuring jet parameters of fluid at superhigh temperature |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101975590B (en) * | 2010-10-14 | 2012-05-30 | 中国科学院等离子体物理研究所 | Enthalpy probe for diagnosing thermal plasma |
| CN102322969B (en) * | 2011-06-03 | 2013-04-24 | 华东理工大学 | High-temperature testing probe, device and method for entrained flow gasifier |
| CN103698037B (en) * | 2013-12-16 | 2016-03-23 | 中国空气动力研究与发展中心超高速空气动力研究所 | A kind of water-cooled enthalpy probe |
| CN104936369A (en) * | 2015-05-22 | 2015-09-23 | 中国科学院等离子体物理研究所 | Ion source fast-connection scalable water-cooled Langmuir double probe |
| CN105784148A (en) * | 2016-03-22 | 2016-07-20 | 无锡南理工科技发展有限公司 | Temperature sensor |
| CN105717896A (en) * | 2016-03-23 | 2016-06-29 | 无锡南理工科技发展有限公司 | Remote monitoring system |
| CN107101777B (en) * | 2017-05-08 | 2019-02-26 | 北京航空航天大学 | A kind of pressure probe comb with air-breathing branching rod structure |
| CN113432775B (en) * | 2020-03-23 | 2023-04-18 | 核工业理化工程研究院 | Method for calibrating relation curve between gas stagnation pressure in equipment and temperature of cantilever beam component |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2945241A1 (en) * | 1979-11-09 | 1981-05-14 | Siegfried Dr.-Ing. Strämke | Calorimetric sensor measuring enthalpy of high temp. gas flows - has temp. sensors assigned to cooling medium guide tube coaxially arranged between inner and outer tubes |
-
2004
- 2004-09-07 CN CNB2004100745330A patent/CN100385216C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2945241A1 (en) * | 1979-11-09 | 1981-05-14 | Siegfried Dr.-Ing. Strämke | Calorimetric sensor measuring enthalpy of high temp. gas flows - has temp. sensors assigned to cooling medium guide tube coaxially arranged between inner and outer tubes |
Non-Patent Citations (2)
| Title |
|---|
| Entrainment and demixing in subsonic thermal plasmajets:comparison of measurements and predictions. J. R. Fincke,C. H. Chang,W. D. Swank and D. C. Haggard.Int. J. Heat. Mass Transfer.,Vol.37 No.11. 1994 * |
| 高温气流总焓的测量及微型瞬时探针的研制. 戚隆溪，王柏懿.流体力学实验与测量，第11卷第1期. 1997 * |
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