CN103323146A - Isentropic process pressure temperature field device driven by gas and application of device - Google Patents
Isentropic process pressure temperature field device driven by gas and application of device Download PDFInfo
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- CN103323146A CN103323146A CN2012100773301A CN201210077330A CN103323146A CN 103323146 A CN103323146 A CN 103323146A CN 2012100773301 A CN2012100773301 A CN 2012100773301A CN 201210077330 A CN201210077330 A CN 201210077330A CN 103323146 A CN103323146 A CN 103323146A
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Abstract
The invention discloses an isentropic process pressure temperature field device driven by gas and an application of the device. A rigid pressure-proof container (1) with a supporting device is arranged, a set of holes are formed in the container wall, a joint is arranged in the opening of each hole in a matching mode, one end portion of each joint stretches into the cavity of the container, a balloon (11) for an experience is fixedly arranged on the end portion of each joint, the position of each joint is fixed by a clamp device, connecting lines and tubes (10) of a plurality of functional devices penetrate through the joints in the axial direction. By means of the isentropic process pressure temperature field device driven by gas, the heat capacity ratio can be measured, or a temperature sensor can be standardized dynamically, or the temperature sensor can be calibrated dynamically.
Description
Technical field
The present invention relates to a kind of thermodynamic process pressure and temp field device with gas-powered, relate to or rather a kind of isoentropic process pressure and temp field device with gas-powered and with this measurement device ratio of specific heat, dynamic calibration, demarcation temperature sensor.
Background technology
The device of the isoentropic process pressure and temp field measurement ratio of specific heat that a kind of state-of-the-art piston promotes is U.S. PASCO experimental system.Lin Xinyuan/Shanxi Normal University's journal (natural science edition) 2004.3 comprises that a pressure transducer of installation, a temperature sensor link to each other with test macro in a cylinder with piston, the cylinder.Carry on fast or when pressing down piston, adiabatic fast isoentropic process pressure and temp variation occurs in gas in the cylinder, stored by the collection of PASCO Physical Experiment test macro, minority is gathered pressure, temperature data implementation least square method double-log fitting a straight line, get straight slope B, the then ratio of specific heat of tested oxygen
Equal slope and subtract one divided by slope, that is:
It is said and theoretical value very approaching.
The disadvantage of this device is, on carry or when pressing down piston, when particularly piston displacement surpasses two times of cylinder radius, make isoentropic process gas collective displacement in the cylinder, away from the static structure center, produce powerful eddy current, away from quasistatic process, the heat interchange of accelerator gas and casing wall is difficult to measure the pressure and temp value of the isoentropic process of a thermal insulation.Because a polytropic process of evenly leaking heat still can mark the straight line of a stable slope, always can in leaking the slope straight line of heat, those find your desirable straight line.Moreover pressure, temperature sensor disturb nature isoentropic process temperature field temperature.
Since adiabatic bad, model is not proper, deviates from quasistatic process, the accurately interference of the destroyed and sensor for temperature field of letter relation between pressure and temperature, can not measure accurately temperature variation, can not survey accurate gas ratio of specific heat, can not be used for dynamic calibration at all, demarcate temperature sensor.
A kind of advanced person's can north source property U.S. CHAL010 type thermopair dynamic calibration system.Dynamic experiment and utilization/Hao Xiaojian thereof, Jin Hong chief editor, Electronic Industry Press, Beijing, 2008.6, comprise one by static state calibrate by school temperature sensor and radiation thermometer, place two focus places of elliposoidal catoptron, with the adjustable CO of high-power high-frequency
2The aurora device heats by the school temperature sensor by design time but does not reach thermal equilibrium, the heated radiation thermometer that is arrived another focus by the school temperature sensing with infrared light reflection in surface, the equilibrium temperature of temperature sensor when having felt on the contrary to think balance, like this real radiation thermometer and do not reach balance by the school sensor between produce the dynamic temperature measurement error.Owing to being that the heating of crosstalk PULSE HEATING and natural temperature field differs greatly, and only having heating intensity and heat time heating time to the impact of dynamic temperature measurement error, can follow without definite rule, calibration is had no result.
The disadvantage of this device be lose contact with reality the temperature field naturally the heating, the rule between this concerns that this is without foundation.Only have in addition two factor affecting dynamic temperature measurement errors, the extremely difficult useful data rule that finds dynamic calibration.
About the dynamic calibration temperature sensor, never someone did.
Goal of the invention
The purpose of this invention is to provide a kind of isoentropic process pressure and temp field device of the usefulness gas-powered that can overcome the known technology shortcoming and with this measurement device gas ratio of specific heat, dynamic calibration, demarcate temperature sensor.
To achieve these goals, technical scheme of the present invention is, balloon lain in or cover stretches on the joint in the sealing rigid container, encase the pressure transducer of the test macro of hermetically passing joint, temperature sensor and spectral measurement window anabolic process balloon one rigid container test macro or many balloons-rigid container test macro.The in-built process gas of process balloon, the in-built driving gas air of thrust balloon, the isoentropic process of the capable thermal insulation of driving process balloon internal procedure gas forms the pressure and temp field of accurate funtcional relationship, in order to the ratio of specific heat of test process gas and dynamic calibration, demarcation temperature sensor.
In such scheme, described rigid container is the sphere of anti-positive and negative pressure or elliposoidal or garden tubular or taper or two garden cone garden cartridge type or with the bipyramid garden cartridge type of piston or polygon is transparent or opaque containers, mirror or dress heat insulation layer are made in container inner wall polishing or polishing.
Described balloon comprises latex balloon or plastic balloon or aluminium foil balloon or metallic film balloon or full film balloon or part film partially rigid wall balloon or independent balloon or contains balloon.
The principle of work of technical solution of the present invention is: for regulate the differential pressure size, for fear of high pressure gas holder gas, heat is leaked in the direct impact process balloon vibration of explosion product gas, in rigid container, add again especially a thrust balloon, process balloon and thrust balloon are divided into space in the process balloon with rigid container, space and the balloon external space three parts in the thrust balloon.The in-built process gas of process balloon, the exterior driving gas air of process balloon, the in-built thrust gas of thrust balloon.Process gas comprises stable same molecular gas or the stable mixed gas of certainty ratio.Pour under the thrust of thrust in the thrust balloon, thrust balloon implode product gas at thrust, the high pressure gas holder gas of piston, act on respectively driving gas, drive again process balloon internal procedure gas and carry out fast isoentropic process adiabatic, the moment thermal insulation, through a pressure P that raises gradually, the temperature T change procedure is from the pressure P of primary state
0, temperature T
0, density p
oBe driven to top pressure P
h, temperature T
h, density p
hAlso be surge pressure and peak temperature, peak density, drop to again more stable pressure P, temperature T, density p.The primary state pressure P
0Can be malleation or negative pressure or standard and press or local atmospheric pressure, the primary state temperature can be the arbitrary temp attitude, usually gets 298.15K attitude or 298K attitude or 300K attitude.
Current manometric technique is very ripe, and any dynamic pressure in the described isoentropic process pressure and temp field changes and can both store by Measurement accuracy, but the temperature sensor technology is relatively backward, and also unmanned Measurement accuracy is crossed the dynamic temperature of described pressure and temp field so far.Fortunately in the pressure and temp field, very accurately funtcional relationship is arranged between the pressure and temperature:
The negative first power that the natural logarithm of temperature variation multiple equals slope B takes advantage of pressure to change the natural logarithm of multiple, that is:
ln(T/T
0)＝B
-1ln(P/P
0)
Ratio of specific heat equal slope divided by slope subtract one poor, that is:
γ＝B/(B-1)
The final state temperature equals the negative first power of slope of pressure variation multiple and takes advantage of the primary state temperature, that is:
T＝(P/P
0)
-B×T
0
Densities of accessible final states equals the negative first power of the ratio of specific heat of pressure variation multiple and takes advantage of primary state density, that is:
ρ
0＝(P/P0)
-γ×ρ
0
So measured accurately dynamic pressure just equaled Measurement accuracy dynamic temperature and density.But just nobody creates this adiabatic isoentropic process pressure and temp field before this, this accurately dynamic temperature also just never occurs.
Described pressure, temperature, density relationship are relation corresponding to arbitrary identical moment.
The process time that this patent refers to calculates with real process and is as the criterion, and process time equals sample frequency f
sExcept the dynamic temperature waveform accounts for sampled point number n
s, that is: t
s=n
s/ f
s
Except the spectroscopic temperature measurement sensor, the structure of contact type temperature sensor is particularly surveyed the structure of dynamic temperature sensor, can not be with traditional method with sensor or its probe and temperature field balance, then the temperature sensor measured temperature is exactly the temperature in temperature field to be measured, if like that, also do not reach before the equalized temperature, sensor early has been melted, unless a temperature is in low temperature range.So must replace with the non-equilibrium temperature of not destroying sensor the equilibrium temperature in temperature field.Different with the pulse heating methods of dynamic temperature calibration, this patent be with the heating of natural temperature field by dynamic base measuring temperature sensor, greatly cancellation many uncertain factors affect.This patent is with affecting heated 15 principal elements of temperature sensor, with isothermal, etc. in the process time situation separately gas density on by the impact of school sensor, in situation heat time heating time such as isodensity, separately temperature is on by the impact of school sensor, in isothermal isodensity situation, separately heat time heating time is on by the impact of school sensor.Like this, the impact of existing quantitative independent temperature, heat time heating time, Media density, 15 quantitative impacts that factor acts on are simultaneously arranged again, and the example of the actual measurement by hundred above isoentropic process temperature fields again can find in the natural temperature field true temperature T and be passed the non-equilibrium temperature T of sensor by the school
SurveyBetween rule, compensated correction, with the form of form or curve or formula or least square fitting or software, use by the non-equilibrium temperature T of school temperature sensor
SurveyRemove to replace the true temperature T in temperature field, comprised that by the school temperature sensor reaction time is less than contact temperature sensor and Thermosensor or noncontact spectroscopic thermometer and the Thermosensor thereof of 500ms.The temperature sensor of being demarcated comprises infrared light thermometer, total radiation thermometer, leucoscope, photoelectric pyrometer, two-color thermometer, optical fiber radiation temperature sensor, integrated circuit temperature sensor.
This patent will be illustrated by reference to the accompanying drawings by preferred embodiment
Description of drawings
Fig. 1 is with gas-powered isoentropic process pressure and temp field device front view;
Fig. 2 measures the ratio of specific heat sketch with the isoentropic process pressure and temp field device that piston promotes;
Fig. 3 is the ratio of specific heat sketch of measuring mixed gas with the isoentropic process pressure and temp field device that gases at high pressure promote with gas temperature sensor;
Fig. 4 is the isoentropic process pressure and temp field device dynamic calibration temperature sensor sketch with the explosion product gas push;
Fig. 5 is the isoentropic process pressure and temp field device dynamic calibration temperature sensor sketch with solid explosion product gas push.
Embodiment
Isoentropic process pressure and temp field device as shown in Figure 1; withstand voltage rigid container 1 with bracing or strutting arrangement is arranged; be generally metallic article; if but adopted other material can make standard compliant pressure vessel, also in the application's protection domain, bracing or strutting arrangement would be triangle uniform 2; have the hole at chamber wall; the present embodiment perforate is filled in respectively shape identical and be easy to pack into the joint 3 of taking-up
1, 3
2With 4, stretch into respectively balloon 11
1, 11
2In 12; joint is that disjunctor is large; in; little Cylinder; in; behind the little Cylinder hand-hole; large Cylinder is blocked on the garden ring in aperture; one short tube 5 is fixed on garden, aperture ring perimeter reinforcement; the end of short tube 5 is fixedly connected with by the porose pipe cap 6 in silk mouth and a center; pipe cap is by packing ring 7; pad 8 contacts pressed joint with the upper end of joint face; joint and garden, aperture interannular are lined with O-ring seal 9; certainly fixture splice also can adopt other modes; but all in the application's rights protection; this is understandable, and joint manages 10 along the line of axis direction by a plurality of functional devices of perforate hermetically passing; 10 ' enter in the balloon; described a plurality of functional device is included in the test, the tracheae with threeway that need to relate to; the spectroscopic thermometer testing window; the pressure transducer group; sets of temperature sensors; portfire; residual air heating autovalve, the information acquisition end is usually at process balloon 11
1, 11
2In, the information processing end is connecting test instrument outside ball usually, process balloon 11
1, 11
2And joint 3
1, 3
2Can have a plurality ofly, but the thrust balloon 12 and the joint 4 thereof that connect high pressure gas holder or dress explosive or snorkel and portfire 10 only have one, and other has one to be with three snorkels 10, and the Cylinder end face passes outside the ventilation ball from joint 4.The described balloon of this scheme comprises latex balloon or plastic balloon or aluminium platinum balloon or metallic film balloon or partially rigid wall part thin rubber balloon or mutually contains ball 11
1, 11
2, or long tubular or taper rigid container multilayer film contain balloon more.Usually balloon is fixed in the spherical rigid mesh, when pressure during greater than 8 times of primary state pressure, needing needs to select certain rigid container-balloon structure according to experiment in the protection of process airballoon cover outsourcing soft fabric, selects rigid container Emulsoid-film balloon when for example measuring ratio of specific heat; Taper rigid container and multilayer aluminum platinum film balloon are selected in the timing of dynamic calibration infrared thermometry.
The purposes of above device is: the measurement gas ratio of specific heat; The dynamic calibration temperature sensor; The dynamic calibration temperature sensor.
The isoentropic process pressure and temp field device that embodiment 1 usefulness piston promotes is measured ratio of specific heat.
As shown in Figure 2, be with three snorkels, pressure transducer group, sets of temperature sensors, axially pass joint 3 and enter in the process balloon 11, another is with three snorkels axially to pass joint 3 to enter outside the process balloon 11; Be with three snorkels, spark point axially to pass joint 4 and enter garden cone space on the rigid container, fixed piston 13 positions are from threeway sucking-off process balloon 11 interior air, injection process gas nitrogen N
2, close this threeway.Drive joint 3 and enter the outer threeway of balloon, allow the process gas balance to the primary state pressure P
0Temperature T
0, close this threeway; The primary state pressure P
0Can be malleation or negative pressure or local atmospheric pressure, primary state temperature T
0Can be any temperature attitude, still, usually get 298K attitude or 298.15K attitude or 300K attitude, open joint 4 threeways, start original thrust, carry or press down piston 13, short balloon 11 internal procedure gas N on fast
2The adiabatic process of row constant entropy is changed to the final state pressure P, temperature T, and its pressure, temperature variation overall process are passed to test macro by pressure transducer, temperature sensor and store, and get one group of pressure P that test point is corresponding
i, temperature T
iThe value respectively with primary state pressure and temp multiply P
i/ P
0, T
i/ T
0Row least square method double-log fitting a straight line gets intercept and equals zero later on, and slope equals
Also the natural logarithm of available pressure rising multiple is calculated to get slope, that is: except the merchant of the natural logarithm of corresponding temperature rising multiple
Get N
2Ratio of specific heat equal slope divided by slope subtract one poor, that is:
Because ratio of specific heat equals heat capacity at constant pressure divided by heat capacity at constant volume, i.e. γ=C
p/ C
ySo, must equal heat capacity at constant volume with the molecular gas heat capacity at constant pressure and take advantage of ratio of specific heat or equal heat capacity at constant volume and add 2R, that is:
This device can be with piston actuated or drive of high-pressure gas, or blast drives, and measures ratio of specific heat or dynamic calibration temperature sensor or dynamic calibration temperature sensor.
The isoentropic process pressure and temp field device that embodiment 2 usefulness gases at high pressure promote is with the ratio of specific heat of gas temperature sensor measurement mixed gas.
As shown in Figure 3, with the tracheae with threeway, the pressure transducer group is axially passed joint 3, enters process balloon 11
1In, another is with three snorkels axially to pass joint 3 to enter part film process balloon 11
2In; Be with three snorkels axially to pass joint 4 and enter thrust balloon 12, another is with three snorkels axially to pass joint 4 to enter in the rigid container.
Open vacuum pump exhaustion process balloon 11
1, 11
2, air in thrust balloon 12 and the rigid container closes four T-valve, drops a hint into rigid container and atmospheric equilibrium from logical rigid container T-valve, from passing through journey balloon 11
1T-valve injects equivalent methane air mixed gas and enters process balloon 11
1In, close this valve.Inject argon Ar from T-valve and enter process balloon 11
2In, close this valve.Inflammable gas has self-ignition temperature separately, available they as the temperature of gas temperature sensor sense temperature field and the spontaneous combustion blast, the self-ignition temperature of equivalent methane air is 810K, injects air from T-valve to enter in the thrust balloon 12, closes this valve.Equilibrium process gas is to the primary state pressure P
0, temperature T
0, in primary state or final state or process, balloon 11
1With 11
2Internal pressure all equates, closes logical rigid container T-valve.Putting high pressure gas holder 14 inner high voltage gases is exceedingly fast and enters in the thrust balloon 12 compression process that is exceedingly fast balloon 11
1, 11
2The isoentropic process of the capable thermal insulation of interior gas is surveyed process balloon 11
2Interior gas maximum pressure reaches 9.6 times of P
0During pressure, balloon 11
1Interior methane air mixed gas explodes naturally, and the slope B that obtains the methane air gas mixture equals the logarithm of self-ignition temperature rising pressure multiplication factor except the logarithm of pressure rising multiple, that is:
That is:
Its ratio of specific heat equal slope divided by slope subtract one poor, that is:
The thermal capacitance of certainty ratio mixed gas equals the mean value that each separate gas thermal capacitance is contributed in proportion, that is:
So the heat capacity at constant volume of equivalent methane air mixed gas is:
Then mix methane air gas heat capacity at constant pressure and equal heat capacity at constant volume and take advantage of ratio of specific heat or equal heat capacity at constant volume and add 2R, that is:
C
P0 first-sky=C
V0 first-sky* γ
First-sky
=2.5741R * 1.3830=(C
V0 first-sky+ 2R) jmol
-1
This device can promote or gas burst promotion or solid blast promotion isoentropic process pressure and temp field with gases at high pressure, measures ratio of specific heat or dynamic calibration temperature sensor or dynamic calibration temperature sensor.
As shown in Figure 4, in the taper rigid container, pacify three joints 3
1, 3
2, 3
3, fill respectively three lucifuge part film balloons 11
1, 11
2, 11
3, dress is with three snorkels and one group of pressure transducer respectively; In joint 3
1Fill one group and treat school contact temperature sensor and one group of pressure transducer, an automatic waste heat valve, a saturating infrared ray monocrystalline silicon window allows the infrared thermometry instrument probe stretch into, and will be with three snorkels and spark point to pass joint 4 and enter rigid container, process balloon 11
1Rigid walls polish smooth and make ATR-FTIR line minute surface.
From four threeways, take out most process balloon 11
1, 11
2, 11
3With air in the rigid container, lead to Process Gas ball 11 from three again
1, 11
2, 11
3Interior injection argon Ar closes this three threeways.Inject damp from joint 4 threeways again, but begin in the ball the same as the first two embodiment to press furnishing malleation or negative pressure or local atmospheric pressure.Allow in the rigid container and each balloon in gas equilibrium to the primary state pressure P
0, temperature T
0, density p
0, survey process balloon 11
1Interior gas height D closes four threeways.The electric shock spark is opened the waste heat valve after drawing fried rigid container implode gas automatically, and explosion product gas is oppressed the capable adiabatic isentropic compression process of each process balloon, through one time delay t
Late, at process time t
sInternal procedure gas reaches maximum pressure P
h, temperature T
h, density p
h, through one section waste-heat time t
More than, drop to equilibrium temperature, measure temperature t by infra-red thermometer
Flash ranging, measure temperature T by contact temperature sensor
Survey, get dynamic error Δ T
Light=T
Reason-t
Flash rangingΔ T=T
Reason-t
Survey, Process Gas thickness D and process gas form W, totally ten five parameters, and independent temperature factor, separate processes time, separately gas density factor.Theoretical temperatures T wherein
ReasonIt is exactly ball 11
1Interior gas actual temperature, it equals the negative first power of slope of pressure rising multiple and takes advantage of the primary state temperature, that is:
In order to dynamic calibration contact type temperature sensor or infra-red thermometer, said dynamic calibration comprises the calibration of curve or form or formula or match or software, and said temperature sensor comprises infra-red thermometer or other spectroscopic thermometer or contact type temperature sensor.Said process time t
sThe intensification waveform elapsed time of measuring, the sampling number n that the waveform that equals to heat up occupies
fDivided by sample frequency f
sThat is: t
s=n
f/ f
s
This device can drive with drive of high-pressure gas or gas burst driving or solid blast and measure ratio of specific heat or dynamic calibration temperature sensor or dynamic calibration temperature sensor.
The isoentropic process pressure and temp field device dynamic calibration temperature sensor of embodiment 4 usefulness solid explosion product gas pushs.
As shown in Figure 5, be with three snorkels with one, one group of pressure transducer, an automatic waste heat valve, a full impregnated infrared ray monocrystalline silicon window seal of tube passes joint 3 and enters process balloon 11
1In, infrared ray moment temperature measurer light probe to be calibrated inserts window pipe thermometric.Other is propped up be with three snorkel hermetically passing joints 3 to enter process balloon 11
2In; To produce spark point wraps into and allows wire and be with three snorkels to pass joint 4 to enter in the thrust balloon 12 in the solid explosive 15, being with three snorkels to pass joint 4 with the 4th enters in the rigid container, also can remove thrust balloon 12, directly will be surrounded by the solid explosive that produces spark point and enter in the rigid container, the wire that will produce again spark point passes joint 4 and picks out outside the rigid container.Process balloon 11
1With 11
2The ball film is with adiathermanous elastic membrane or fold film.Open logical rigid container T-valve on the joint 4, by two T-valve difference sucking-off air on the joint 3, the Ar of argon institute that packs into closes this two T-valve.Measuring process balloon 11
1Diameter D and injection argon gas amount.Balance is to the primary state temperature T
0, pressure P
0, density p
0, primary state pressure can be malleation or negative pressure or equilibrium air pressure, touches spark point and produces electric spark, draws fried solid explosive, produces high temperature and high pressure gas, drives process balloon 11
1With 11
2Internal procedure gas argon gas is at process time t
sAdd one section waste heat time t
More thanThe row isoentropic process is by pressure transducer accurate recording pressure store change procedure, process balloon 11
1It is signal that interior high temperature argon generation infrared ray is detected momentary variations in temperature by infrared ray moment temperature measurer, record, storage, accurate recording sample frequency f
sAccurate recording storage in process time or process time add infrared ray millivolt or milliampere changing value that one section known waste-heat was measured in the time, the negative first power of argon gas slope that equals pressure rising multiple with the accurate actual temperature of accurately pressure rising multiple reflection is taken advantage of the primary state temperature T
0, that is:
As temperature standard, dynamic calibration infrared ray instantaneous temperature instrument by dynamic millivolt or milliampere number that infrared thermometer records, is exactly temperature value in the following formula.Thereby dynamic calibration infrared thermometer.Add at last the dynamic calibration of the impacts such as concentration, pressure, thickness of length heat time heating time, argon gas, make demarcation more accurate.With the method also capable of dynamic demarcate other spectroscopic thermometer or contact type temperature sensor.
Claims (10)
1. isoentropic process pressure and temp field device by gas-powered, it is characterized in that: a rigidity pressure vessel (1) with bracing or strutting arrangement is set, open one group of hole at chamber wall, the place, aperture cooperates an end to put in the interior joint of container chamber, the joint end is fixed with the balloon (11) of doing experiment, joint passes the line of a plurality of functional devices by the fastener fixed position along the joint axis direction, pipe (10).
2. purposes with the isoentropic process pressure and temp field device of gas-powered, it is characterized in that, by piston, gases at high pressure, three kinds of original purposes that push away power-actuated isoentropic process pressure and temp field device of explosion product gas, be measurement gas ratio of specific heat or dynamic calibration temperature sensor or dynamic calibration temperature sensor.
3. a kind of isoentropic process pressure and temp field device with gas-powered according to claim 1 is characterized in that: described rigidity pressure vessel is bipyramid garden tubular or with bipyramid garden tubular or single cone garden tubular or garden tubular or sphere or elliposoidal or taper or the polygon container of piston.
4. a kind of isoentropic process pressure and temp field device by gas-powered according to claim 1, it is characterized in that: a plurality of functional devices comprise escape pipe or spectroscopic temperature measurement window or waste heat autovalve or pressure transducer group or sets of temperature sensors or portfire at least.
5. a kind of isoentropic process pressure and temp field device with gas-powered according to claim 1 is characterized in that: described balloon comprises that latex balloon or plastic balloon or aluminium platinum balloon or metallic film balloon or part film balloon or multilayer film contain balloon.
6. the purposes of a kind of isoentropic process pressure and temp field device with gas-powered according to claim 2 is characterized in that: described ratio of specific heat, and will be with the molecular gas nitrogen N
2The one group of pressure, the temperature value (P that are recorded
i, T
i) multiply (lnP
i/ P
0, lnT
i/ T
0) after, row least square method double-log fitting a straight line gets the null slope of intercept
Get ratio of specific heat and equal slope
Subtract-(B-1) get divided by slope:
Get N
2Heat capacity at constant pressure be that its heat capacity at constant volume is taken advantage of ratio of specific heat
Or equaling heat capacity at constant volume adds 2R, that is:
The heat capacity at constant pressure C of the mixed gas of certainty ratio
Po is mixedAlso equal heat capacity at constant volume and take advantage of ratio of specific heat or equal heat capacity at constant volume and add 2R, that is:
7. the purposes of a kind of isoentropic process pressure and temp field device with gas-powered according to claim 2, it is characterized in that: described gas temperature sensor, be the temperature with the self-ignition temperature sense temperature field of inflammable gas, and show with spontaneous combustion blast form.
8. the purposes of a kind of isoentropic process pressure and temp field device with gas-powered according to claim 2, it is characterized in that: the thermal capacitance of described certainty ratio mixed gas equals the mean value that the each component thermal capacitance is contributed in proportion, its heat capacity at constant volume C
V0With heat capacity at constant pressure C
P0Be respectively:
9. the purposes of a kind of isoentropic process pressure and temp field device with gas-powered according to claim 2, it is characterized in that: described dynamic calibration thermometer, be with in the process take the rising temperature as main totally ten five parameters, and temperature, density, process time three large separately factors are on the impact of dynamic error.Be used for the sheet format of temperature sensor or the dynamic calibration of curvilinear style or formula formula or match formula or software type.
10. process time according to claim 9 is characterized in that: this process time t
sBe process gas from primary state temperature intensification degree after maximum temperature, the real time when falling back to again the equilibrium temperature starting point, it equals sample frequency f
sAccount for the number n of sampled point except the temperature waveform
fThat is: t
s=n
f/ f
s
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104064395A (en) * | 2014-07-09 | 2014-09-24 | 国家电网公司 | High-voltage circuit breaker arc extinguish chamber pressure measurement method based on built-in elastic ball |
| CN104064396A (en) * | 2014-07-09 | 2014-09-24 | 国家电网公司 | High-voltage circuit breaker arc extinguish chamber pressure measurement method based on built-in air pipe |
| CN104064394A (en) * | 2014-07-09 | 2014-09-24 | 国家电网公司 | Device for measuring pressure in high-voltage circuit breaker arc extinguish chamber based on built-in elastic ball |
| CN112557442A (en) * | 2020-12-14 | 2021-03-26 | 西安近代化学研究所 | Post-combustion effect judgment test method |
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| 林新源: "用计算机数据采集精确测量气体的摩尔热容比", 《山西师范大学学报(自然科学版)》, vol. 18, no. 1, 31 March 2004 (2004-03-31), pages 67 - 71 * |
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| CN104064395A (en) * | 2014-07-09 | 2014-09-24 | 国家电网公司 | High-voltage circuit breaker arc extinguish chamber pressure measurement method based on built-in elastic ball |
| CN104064396A (en) * | 2014-07-09 | 2014-09-24 | 国家电网公司 | High-voltage circuit breaker arc extinguish chamber pressure measurement method based on built-in air pipe |
| CN104064394A (en) * | 2014-07-09 | 2014-09-24 | 国家电网公司 | Device for measuring pressure in high-voltage circuit breaker arc extinguish chamber based on built-in elastic ball |
| CN112557442A (en) * | 2020-12-14 | 2021-03-26 | 西安近代化学研究所 | Post-combustion effect judgment test method |
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