CN100567929C - Slope adjustable tunnel fire hazard wind tunnel experimental device - Google Patents
Slope adjustable tunnel fire hazard wind tunnel experimental device Download PDFInfo
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- CN100567929C CN100567929C CNB200710032353XA CN200710032353A CN100567929C CN 100567929 C CN100567929 C CN 100567929C CN B200710032353X A CNB200710032353X A CN B200710032353XA CN 200710032353 A CN200710032353 A CN 200710032353A CN 100567929 C CN100567929 C CN 100567929C
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Abstract
The invention discloses a kind of slope adjustable tunnel fire hazard wind tunnel experimental device, comprise blast regulator, air quantity distribute again panel, wind-tunnel tunnel, exit flue, gradient regulator and dolly mobile device; Described blast regulator links to each other with the front end in wind-tunnel tunnel by the air quantity panel that distributes again, exit flue links to each other with the rear end in wind-tunnel tunnel, the underrun at the middle part in wind-tunnel tunnel is bolted on the gradient regulator, and dolly mobile device and wind-tunnel tunnel and gradient regulator link together.The present invention can regulate the gradient in wind-tunnel tunnel and control the translational speed and the position of the dolly that catches fire, and different fire scales and scene are simulated, and is applied widely, and apparatus structure is simple, flexible and convenient operation.
Description
Technical field
The present invention relates to a kind of fire test device, particularly a kind of slope adjustable tunnel fire hazard wind tunnel experimental device.
Background technology
For farthest reduce casualties, vehicle decreases useless and fire to the destruction of tunnel structure, need the smoke movement rule under the fire condition in the research tunnel.In the research tunnel, in the method for the fire smoke characteristics of motion, tunnel fire hazard simulated experiment, numerical simulation and theoretical analysis three major types are arranged.The fire smoke characteristics of motion in the tunnel is very complicated, influence factor is also more, and the characteristics of motion of studying the tunnel flue gas by numerical simulation and theoretical derivation fully also has certain difficulty at present.Therefore, means---the characteristics of motion that the tunnel flue gas is inquired after in the tunnel fire hazard simulated experiment just seems very necessary by experiment.
At present, the simulation experiment study of carrying out at tunnel fire hazard mainly contains three kinds of modes: the simulation of (1) saline experiment; (2) large scale and full-scale experiment research; (3) small-scale model experimental study.
Saline experiment simulation is a kind of to be to simulate the aerial research method that spreads with heat transferred of restricted clearance fire smoke with the motion and spreading of the floating salt solution of rapids in clear water, is characterized in the simulation of different medium.Just show the effect that the exhaust opening of ceiling and sidewall is discharged fume with the salt solution analogue technique in big room as far back as Thomas in 1963, people such as Tangren also used this method to study hot flue gas layer density and the position that Room in Fire produced that has corridor or window in 1/5 model in 1978.Afterwards, there are many researchers to utilize the saline experiment analogy method to study the flow of flue gas that fire brings out in the airtight Compound Cavity, the flowing property of two-dimentional run by gravity, restricted clearance plume stream metastable state structure and the generation evolution that spreads rule, ceiling jet and ceiling lower leaf stream, the fire smoke characteristics of motion in the side room-corridor flue gas and the characteristics of motion of entrainmenting air, Zhongting type buildings and the motion of the fire smoke of hypogee.These experimental results all provide very big help to the research fire smoke characteristics of motion.But the saline experiment analogy method also exists following shortcomings: ignored the chemical reaction when wall conducts heat and burns in saline experiment, the flue gas layer temperature of experimental simulation is on the low side than the entity combustion experiment.The basic theories of this method is perfect not enough, and the error of quantitative examination is bigger.
Carry out the especially full-scale correlation test of large scale and come the test of existing small size and The results of numerical simulation are verified and revised extremely importantly, done a large amount of work in this respect abroad.The U.S., states such as Japan utilize disused tunnel to carry out a series of full-scale experiments, test as the Ofenegg tunnel fire hazard that nineteen sixty-five carries out, the fire test that 1974-1975 Austria carries out in discarded Zwerberg tunnel, 1976, the test that people such as Heselden carry out in discarded tunnel, Glasgow, 1990-1993, the EUREKA 499 in Europe plans 5 fire tests carrying out in Norway Repparfjord tunnel, 1993-1995,92 fire tests that U.S. MTFVTP project is carried out in West Virginia Memorial vcehicular tunnel, calendar year 2001, the big section vcehicular tunnel full size that Japan carries out in No. 3 tunnels of New Tomei highway Shimizu cun fire test; 2003, No. 4 the full sizes cun fire test that European UPTUN project is carried out in the discarded Runehamar tunnel, two tracks of Norway.
It is less that China carries out such experimental study, has only China Science ﹠ Technology University's SKLFS to carry out full-scale fire disaster simulation test in Kunming, Yunnan Province-stone forest highway Yang Zong tunnel.People such as professor Yang Qixin of Southwest Jiaotong University are then by vast scale fire model test, when having studied fire in the tunnel temperature over time, the relation of maximum temperature and ventilation wind speed, fire scale etc.This model tunnel adopts the reinforced concrete pipeline section to be formed by connecting, long 100m, the gradient 2%, tunnel internal diameter 1.8m, lining cutting wall thickness 15cm, the section configuration of approximate Qinling Mountains speciality vcehicular tunnel.
Large scale and full-scale test disclose Changing Pattern to the understanding fire behavior, are bringing into play very important effect.But because the singularity of tunnel structure and huge length breadth ratio feature, building full-scale or large-sized test platform is the comparison difficulty, need expend lot of manpower and material resources.In addition, because the complicacy and the randomness of actual fire, full-scale fire test often can't be realized again.Corresponding, with the similarity theory is to have the characteristics of true reappearance fire phenomena according to the small-scale model test of setting up, have unique advantages saving time, shorten the space and save aspects such as human and material resources, financial resources, thereby in research method, seem particularly important and be widely used at tunnel fire hazard.
As far back as 1979, people such as Lee were 0.27m at long 13.7m, cross-sectional area just
2The small size testing table on carried out critical vertical wind speed research.People (1996) such as people such as people's (nineteen ninety), Xue (1993) such as people's (nineteen ninety), Kwack such as people (1979), Vantelon such as Chaiken and Oka has set up the small size testing table that scale differs in succession and has carried out the research of critical wind velocity afterwards.From present research situation, these undersized tunnel fire hazard simulation experiment study mainly lay particular emphasis on two aspects: in (1) tunnel during breaking out of fire, in order to suppress the required minimum critical of the flue gas adverse current wind speed of vertically blowing; (2) in the tunnel during breaking out of fire, the plume feature in nearly burning things which may cause a fire disaster zone.But to the influence of flow of flue gas with to critical longitudinal ventilation Influences on Wind Velocity, and the different influence researchs to smoke movement of catch fire vehicle location and travelling speed also do not relate to for the tunnel top rake.This is because present small size tunnel fire hazard analogue experiment installation has the following disadvantages when the simulation tunnel fire: (1) tunnel gradient can't be made multi-angle and regulate, and can not test the influence of slope change to the flue-gas temperature field from experimental viewpoint.(2) the catch fire position and the travelling speed thereof of vehicle is very big to the influence of change of temperature field in the tunnel, but position and the travelling speed facing to fiery vehicle is uncontrollable in the experimental provision.
Summary of the invention
The objective of the invention is to overcome the tunnel gradient that exists in the prior art and can't make the position of the uncontrollable dolly that catches fire in multi-angle adjusting and the experimental provision and the defective of travelling speed, a kind of movably slope adjustable tunnel fire hazard wind tunnel experimental device of dolly that catches fire is provided.
The present invention can be achieved by the following technical programs: a kind of slope adjustable tunnel fire hazard wind tunnel experimental device comprises blast regulator, air quantity distribute panel, wind-tunnel tunnel, exit flue, gradient regulator and dolly mobile device again; Described blast regulator links to each other with the front end in wind-tunnel tunnel by the air quantity panel that distributes again, exit flue links to each other with the rear end in wind-tunnel tunnel, the underrun at the middle part in wind-tunnel tunnel is bolted on the gradient regulator, and dolly mobile device and wind-tunnel tunnel and gradient regulator link together.
Blast regulator of the present invention comprises preceding damper, back damper, air intake passage, axial flow blower and air exhaust passage, damper and back damper are close together before described, and link to each other with axial flow blower by air intake passage, the other end of axial flow blower links to each other with air exhaust passage, damper is an adjustable plate that offers fan-shaped air inlet before described, and on this plate turning handle is installed, described back damper is an adjustable plate that offers fan-shaped air outlet, and the adjusting wind speed of blast regulator is 0～5m/s.
The air quantity of the present invention panel that distributes again is a dividing plate that offers two circular air channels, and the profile of this dividing plate is identical with the cross sectional shape in wind-tunnel tunnel, and size is close.
Wind-tunnel of the present invention is provided with the guide rail that dolly moves in the tunnel, have the flue gas concentration exploration hole on the one wall, have flue gas view window and wind speed exploration hole on another sidewall, its top is equipped with temperature thermocouple, and the cross sectional shape in wind-tunnel tunnel is rectangle, circle or close with real tunnel cross sectional shape a kind of.
Gradient regulator of the present invention comprises steel frame construction, wind-tunnel turning joint, adjuster bar turning joint, gradient adjuster bar, ratchet bar, base and bearing support, one end of described gradient adjuster bar is fixed on the steel frame construction by the adjuster bar turning joint, the other end places on the ratchet bar of base, one end of bearing support is fixed on the base, the other end is connected on the steel frame construction by the wind-tunnel turning joint, and gradient adjuster bar can to make the range of adjustment of the tunnel gradient be-6.7 °～7.0 °.
Dolly mobile device of the present invention comprises front jockey wheel, back angle sheave, dolly, guide rail, runner support, handle, runner and traction steel wire, described front jockey wheel and back angle sheave are separately fixed at the front and back end in wind-tunnel tunnel, runner links to each other with handle and is fixed on the steel frame construction in the gradient regulator by the runner support, and dolly links to each other with runner by traction steel wire.This dolly is provided with burning bed and food tray, and fuel oil is contained in the food tray, and food tray places on the burning bed.
Compared with prior art, the present invention has the following advantages:
1, experimental provision of the present invention is simple in structure, flexible and convenient operation, can reproduce flowing of flue gas under the true tunnel fire hazard scene, be aided with various testing tools and instrument, can carry out high-acruracy survey flow of flue gas rules such as the flue-gas temperature field in the flow of flue gas, concentration fields;
2, the model tunnel gradient of experimental provision of the present invention can be regulated by gradient regulator, thereby can simulate the plume motion when fire takes place under various tunnels gradient situation, simultaneously, gradient regulator is regulated the simple to operate of the model tunnel gradient, and erected cost is not high;
3, experimental provision of the present invention can be controlled the position and the travelling speed of the dolly that catches fire, thereby can simulate burning things which may cause a fire disaster when being positioned at the tunnel diverse location, and burning things which may cause a fire disaster moves and the asynchronous fire smoke flow scenarios of travelling speed, and the dolly mobile device is simple for structure, and control flexibly;
4, experimental provision scope of experiment of the present invention enlarges, can make up mutually the fire scenario under the fire scenario under the various ventilation operating modes, different fire scales, the various tunnels gradient, the fire scenario when burning things which may cause a fire disaster is still in different parts, the fire scenario when burning things which may cause a fire disaster moves with various speed, thereby can experimentize research the flow of flue gas rule that various tunnel fire hazard scenes under the reality are produced.
Description of drawings
Fig. 1 is the general assembly drawing of slope adjustable tunnel fire hazard wind tunnel experimental device of the present invention;
Fig. 2 is the system construction drawing of blast regulator;
Fig. 3 is the system construction drawing of gradient regulator;
Fig. 4 is the system construction drawing of dolly mobile device;
Fig. 5 is preceding damper structural drawing;
Fig. 6 is a back damper structural drawing;
Fig. 7 is the air quantity panel structure chart that distributes again;
Fig. 8 is that temperature test thermopair vertical section is arranged synoptic diagram;
Fig. 9 is that synoptic diagram is arranged in temperature test thermopair transversal section.
Description of symbols in the accompanying drawing:
The 1-blast regulator; The 2-air quantity panel that distributes again; 3-wind-tunnel tunnel; 4-flue gas concentration exploration hole; 5-flue gas view window; 6-wind speed exploration hole; The 7-exit flue; 8-gradient regulator; 9-dolly mobile device; Damper before the 10-; Damper behind the 11-; The 12-air intake passage; The 13-axial flow blower; The 14-air exhaust passage; The 15-steel frame construction; 16-wind-tunnel turning joint; 17-adjuster bar turning joint; 18-gradient adjuster bar; The 19-ratchet bar; The 20-base; The 21-bearing support; The 22-front jockey wheel; The 23-dolly; The 24-guide rail; 25-runner support; The 26-handle; 27 runners; The 28-traction steel wire; The 29-turning handle; The fan-shaped air inlet of 30-; Adjustable plate before the 31-; The fan-shaped air outlet of 32-; The 33-aft ramp; The 34-dividing plate; The circular air channel of 35-; The 36-thermopair; L-temperature thermocouple axial spacing; H-wind-tunnel tunnel height; W-wind-tunnel tunnel width.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in detail.
As shown in Figure 1, be the general assembly drawing of experimental provision of the present invention.Experimental provision of the present invention comprises blast regulator 1, air quantity distribute panel 2, wind-tunnel tunnel 3, exit flue 7, gradient regulator 8 and dolly mobile device 9 again; Described blast regulator 1 links to each other with the front end in wind-tunnel tunnel 3 by the air quantity panel 2 that distributes again, exit flue 7 links to each other with the rear end in wind-tunnel tunnel 3, the middle part in wind-tunnel tunnel 3 on the bottom surface by being bolted on the gradient regulator 8, dolly mobile device 9 links together with wind-tunnel tunnel 3 and gradient regulator 8.Wind-tunnel tunnel 3 adopts the steel construction pipeline section, experimental section total length 11.5m effectively tests segment length 10.8m, and sectional dimension is 0.45m (height) * 0.90m (wide), the section configuration of approximate actual tunnel, the level angle in wind-tunnel tunnel 3 can be regulated in-6.7 ℃～+ 7 ℃ scopes.Be provided with the guide rail 24 that dolly 23 moves in the wind-tunnel tunnel 3, make things convenient for dolly 23 to move, its left side wall has been offered 5 strip flue gas view windows 5 every 2m, view window is made panel with fireproof glass, the flow state and the smoke stratification thickness of plume in the tunnel when being used to observe fire and taking place.The flame of fire and flow of flue gas image capturing system adopt the digital vedio recording technology, by image acquisition 1394 card input computer generated images, its left side sidewall is provided with 1 wind speed exploration hole 6, right side sidewall is provided with 5 flue gas concentration exploration holes 4, be used to place holes probe and flue gas concentration probe, its top is equipped with temperature thermocouple, and thermopair is connected with intellectual digital temperature logging, in order to measure flue-gas temperature.
As shown in Figure 2, be the system construction drawing of blast regulator of the present invention.Blast regulator 1 of the present invention comprises preceding damper 10, back damper 11, air intake passage 12, axial flow blower 13 and air exhaust passage 14, damper 10 and back damper 11 are close together before described, and link to each other with axial flow blower 13 by air intake passage 12, the other end of axial flow blower 13 links to each other with air exhaust passage 14.Preceding damper 11 is preceding adjustable plates 31 that offer fan-shaped air inlet 30, and turning handle 29 is installed on this plate, and described back damper 11 is aft ramps 33 that offer fan-shaped air outlet 32.By the relative position of damper before rotation axis flow fan 13 front ends 10 and back damper 11, the adjustable damper aperture, and, can provide different air quantity and wind speed by opening or closing axle flow fan 13.Through the air quantity panel 2 that distributes again, be blown in the wind-tunnel tunnel 3 then, the wind speed in the wind-tunnel tunnel 3 can be changed in 0～5m/s scope.
As shown in Figure 3, be the system construction drawing of gradient regulator of the present invention.Gradient regulator 8 of the present invention comprises steel frame construction 15, wind-tunnel turning joint 16, adjuster bar turning joint 17, gradient adjuster bar 18, ratchet bar 19, base 20 and bearing support 21, one end of described gradient adjuster bar 18 is fixed on the steel frame construction 15 by adjuster bar turning joint 17, the other end places the ratchet bar 19 of base, one end of bearing support 21 is fixed on the base 20, and the other end is connected on the steel frame construction by wind-tunnel turning joint 16.It is by the gradient adjuster bar 18 in the gradient regulator 8 being placed the diverse location on the ratchet bar 19 realize that the gradient in wind-tunnel tunnel 3 is regulated.By regulating the position that gradient regulator 8 places on the ratchet bar 19, the gradient in wind-tunnel tunnel 3 is changed in-6.7 °～7.0 ° scopes, be used for the tunnel fire hazard scene of simulation tunnel under the various gradients.
As shown in Figure 4, be the system construction drawing of dolly mobile device of the present invention.Dolly mobile device 9 of the present invention comprises front jockey wheel 22, back angle sheave, dolly 23, guide rail 24, runner support 25, handle 26, runner 27 and traction steel wire 28, described leadingly take turns and the back angle sheave is separately fixed at the front and back end in wind-tunnel tunnel 3 to 22, runner 27 links to each other with handle 26 and is fixed on the steel frame construction 15 in the gradient regulator 8 by runner support 25, and dolly 23 links to each other with runner 27 by traction steel wire 28.By turning handle 26 dolly 23 is moved along guide rail 24,, be used for simulating the tunnel fire hazard scene of dolly 23 when being still in the interior different parts in wind-tunnel tunnel 3 of catching fire to regulate the position of dolly 23 wind-tunnel tunnel 3 in; By turning handle 26 dolly 23 is moved along guide rail 24 with various speed, catch fire dolly 23 with various speed tunnel fire hazard scene when mobile in wind-tunnel tunnel 3 in order to simulation.Above-mentioned dolly 23 is provided with burning bed and food tray, and fuel oil is contained in the food tray, and food tray places on the burning bed, and dolly can carry 4 little food trays at most.The area of burning can be determined according to the oil plant range of scatter that the fire cases investigation obtains, and can be simulated the tunnel fire hazard scale of different combustion intensities by what and the food tray quantity that add fuel quantity.
As shown in Figure 7, be the air quantity of the present invention panel structure chart that distributes again.The air quantity of the present invention panel 2 that distributes again is dividing plates 34 that offer two circular air channels, and the profile of this dividing plate 34 is identical with the cross sectional shape in wind-tunnel tunnel 3, and size is close.The air quantity panel 2 such structures that distribute again can make the air flow that is blown in the wind-tunnel tunnel 3 near actual conditions, and realize 3 kinds of required vertical wind speed in the experiment: the wind speed that normally ventilates, natural wind speed and fire smoke evacuation wind speed are used for simulating the tunnel fire hazard scene under the different longitudinal ventilation wind speed.
As Fig. 8, shown in Figure 9, for the temperature test thermopair 36 longitudinal and transverse sections of present embodiment are arranged synoptic diagram.Experimental provision of the present invention is provided with 11 temperature test sections, and each section 1.0m of being separated by is provided with the transversal section temperature point at the 6th section and last 1 section along direction of ventilation.The measuring point that longitudinal temperature distributes arranges that along tunnel vault lower horizontal the measuring point that transverse temperature distributes then is distributed in tunnel top and both sides.
The present invention is when carrying out nature wind speed working condition tests, and axial flow blower 13 is in closed condition and separates with wind-tunnel tunnel 3.During difference ventilation wind speed working condition tests, wind speed can be realized by axial flow blower 13 and damper.When the simulation gradient was tested the influence of smoke movement, the variation of the gradient can be by placing the diverse location on the ratchet bar 19 to realize gradient adjuster bar 18.When carrying out fire location, can make the dolly 23 that catches fire be still in different parts in the wind-tunnel tunnel 3 by turning handle 26 simultaneously to the influence of smoke movement experiment.Carry out that burning things which may cause a fire disaster moves and travelling speed during, can the dolly 23 that catch fire be moved with various speed along guide rail 24 by turning handle 26 simultaneously to the influence experiment of smoke movement.Carry out influence when experiment of fire scale, what of fuel quantity are the size of fire scale by adding in food tray, and the quantity of used food tray (to change the size of burning area) realizes.
The embodiment 1-simulation gradient is to the influence of smoke movement
At first arrange the division of labor properly, fire extinguishing personnel and the experimenter preparing experiment that puts in place respectively.Check whether fire model system each measurement subsystem of each parts is moved normally.Regulate the model tunnel system and reach the fire scenario that configures, this experiment is in order to simulate the influence of the gradient to smoke movement, the smoke movement when first simulation tunnel does not have the gradient.Fire scale is set at the small fire scale, and the ventilation wind speed is set at 3m/s, and fixedly fire location is positioned at the middle part, tunnel.Start each test macro by working specification, start computing machine and begin temperature data acquisition, add the fuel for preparing in the food tray, put in the dolly 23, the stable beginning of system to be tested lighted a fire.The experimenter has write down all kinds of experimental datas of whole combustion process.This group experiment finishes, and fire extinguishes, and keeps the experimental data of gained, and air door is opened to maximum, and flue gas residual in the tunnel is discharged, and arrangement experiment place and Experimental Establishment return to original state with industrial and mineral in the tunnel, carries out next group experiment again.Utilizing gradient regulator 8 to regulate the tunnel gradient respectively is 1.5 degree, 3 degree, 4.5 degree, 6 degree, and other is provided with constant, by the above-mentioned described several groups of experiments of carrying out respectively, with the influence to smoke movement of the experimental data comparative analysis tunnel gradient of gained.
Removable and the travelling speed of embodiment 2-burning things which may cause a fire disaster is not simultaneously to the influence of smoke movement
According to the case one described preparation of carrying out before testing, regulate wind-tunnel tunnel 3 systems and reach the fire scenario that configures, the smoke movement under this experimental simulation burning things which may cause a fire disaster is removable, setting fire scale is the small fire scale, and the ventilation wind speed is 0m/s, and the tunnel does not have the gradient.It is 0.08m/s that the burning things which may cause a fire disaster translational speed is set in first group of experiment.Burning things which may cause a fire disaster translational speed 0.14m/s is set in second group of experiment.It is 0.31m/s that the burning things which may cause a fire disaster translational speed is set in the 3rd group of experiment.With the removable and travelling speed of the experimental data comparative analysis burning things which may cause a fire disaster of gained not simultaneously to the influence of smoke movement.
Claims (8)
1, a kind of slope adjustable tunnel fire hazard wind tunnel experimental device is characterized in that: comprise blast regulator, air quantity distribute panel, wind-tunnel tunnel, exit flue, gradient regulator and dolly mobile device again; Described blast regulator links to each other with the front end in wind-tunnel tunnel by the air quantity panel that distributes again, exit flue links to each other with the rear end in wind-tunnel tunnel, the underrun at the middle part in wind-tunnel tunnel is bolted on the gradient regulator, and dolly mobile device and wind-tunnel tunnel and gradient regulator link together; Described gradient regulator comprises steel frame construction, wind-tunnel turning joint, adjuster bar turning joint, gradient adjuster bar, ratchet bar, base and bearing support, one end of described gradient adjuster bar is fixed on the steel frame construction by the adjuster bar turning joint, the other end places on the ratchet bar of base, one end of bearing support is fixed on the base, and the other end is connected on the steel frame construction by the wind-tunnel turning joint.
2, slope adjustable tunnel fire hazard wind tunnel experimental device according to claim 1, it is characterized in that: described blast regulator comprises preceding damper, back damper, air intake passage, axial flow blower and air exhaust passage, damper and back damper are close together before described, and link to each other with axial flow blower by air intake passage, the other end of axial flow blower links to each other with air exhaust passage.
3, slope adjustable tunnel fire hazard wind tunnel experimental device according to claim 2, it is characterized in that: damper is an adjustable plate that offers fan-shaped air inlet before described, and on this plate turning handle is installed, described back damper is an adjustable plate that offers fan-shaped air outlet.
4, slope adjustable tunnel fire hazard wind tunnel experimental device according to claim 1 and 2 is characterized in that: the adjusting wind speed of described blast regulator is 0～5m/s.
5, slope adjustable tunnel fire hazard wind tunnel experimental device according to claim 1 is characterized in that: the described air quantity panel that distributes again is a dividing plate that offers two circular air channels, and the profile of this dividing plate is identical with the cross sectional shape in wind-tunnel tunnel.
6, slope adjustable tunnel fire hazard wind tunnel experimental device according to claim 1, it is characterized in that: described wind-tunnel is provided with the guide rail that dolly moves in the tunnel, have the flue gas concentration exploration hole on the one wall, have flue gas view window and wind speed exploration hole on another sidewall, its top is equipped with temperature thermocouple.
7, according to claim 1 or 6 described slope adjustable tunnel fire hazard wind tunnel experimental devices, it is characterized in that: the cross sectional shape in described wind-tunnel tunnel is rectangle or circle, or the cross sectional shape in described wind-tunnel tunnel is identical with the tunnel cross sectional shape.
8, slope adjustable tunnel fire hazard wind tunnel experimental device according to claim 1, it is characterized in that: described dolly mobile device comprises front jockey wheel, back angle sheave, dolly, guide rail, the runner support, handle, runner and traction steel wire, described front jockey wheel and back angle sheave are separately fixed at the front and back end in wind-tunnel tunnel, runner links to each other with handle and is fixed on the steel frame construction in the gradient regulator by the runner support, dolly links to each other with runner by traction steel wire, described dolly is provided with burning bed and food tray, fuel oil is contained in the food tray, and food tray places on the burning bed.
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| CNB200710032353XA CN100567929C (en) | 2007-12-11 | 2007-12-11 | Slope adjustable tunnel fire hazard wind tunnel experimental device |
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| CN113820090A (en) * | 2021-08-23 | 2021-12-21 | 同济大学 | Pneumatic wind tunnel test section of long tunnel operation vehicle |
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