CN104374542A - Atmospheric environmental wind tunnel temperature stratification simulation system - Google Patents
Atmospheric environmental wind tunnel temperature stratification simulation system Download PDFInfo
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- CN104374542A CN104374542A CN201410715699.XA CN201410715699A CN104374542A CN 104374542 A CN104374542 A CN 104374542A CN 201410715699 A CN201410715699 A CN 201410715699A CN 104374542 A CN104374542 A CN 104374542A
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Abstract
An atmospheric environmental wind tunnel temperature stratification simulation system comprises a master control system, a cooling device, a temperature stratification heating device, a plurality of temperature sensors, a ground cold/heat source simulation device and a water circulation system. The master control system is respectively in electrical signal connection with the plurality of temperature sensors, the cooling device, the temperature stratification heating device, the ground cold/heat source simulation device and the water circulation system. The water circulation system is respectively connected with the cooling device and the ground cold/heat source simulation device through pipelines and valves. The cooling device is mounted in a wind tunnel stable section, the temperature stratification heating device is mounted in a wind tunnel test section and used for stratified heating of air at an entrance of the test section to form gradient temperature, the ground cold/heat source simulation device is mounted on the lower wall surface of the wind tunnel test section, and the upper surface of the ground cold/heat source simulation device is flush with the lower wall surface of the wind tunnel test section. The atmospheric environmental wind tunnel temperature stratification simulation system is high in precision, practically significant to wind tunnel tests for atmospheric pollutant diffusion influence study and capable of realizing temperature field simulation of surroundings of test articles.
Description
Technical field
The present invention relates to a kind of atmospheric environment wind-tunnel temperature lamination simulation system.
Background technology
Atmospheric pollution is mainly derived from the tail gas of the modern transportation tool exhaust such as the gas smoke of resident living discharge, the waste gas of industrial and mining enterprises' discharge and automobile, and the health of these pollutants on the mankind creates very bad impact.
All air pollution episodes cause the great attention of various countries.Wherein wind tunnel test rely on its measure convenient, accurately, safety, flow parameter be easy to control and change, by Changes in weather impact, can long run test, utilization factor high, the advantages such as testing expenses are cheap become the research method be most widely used.
At present, China is only limitted to the simulation to atmospheric boundary layer for the wind tunnel study of atmosphere pollution, i.e. the simulation of atmospheric wind, but the important basic parameter of air not only comprises wind field, also comprises temperature field simultaneously.Therefore, when carrying out atmospheric pollutant dispersion wind-tunnel investigation, atmosphere temperature field is a very important influence factor.Therefore, in order to comprehensively, the spread condition of Pollution Study thing exactly, need simulated atmosphere temperature field environment in the wind tunnel test of atmospheric pollutant dispersion research.Namely need to increase temperature lamination simulation system in atmospheric environment wind-tunnel.
Summary of the invention
Based on above weak point, the object of the invention is open a kind of atmospheric environment wind-tunnel temperature lamination simulation system, this system achieves the simulation to testpieces present position ambient atmosphere temperature environment in atmospheric pollutant dispersion wind comfort.
The technology used in the present invention is as follows: a kind of atmospheric environment wind-tunnel temperature lamination simulation system, comprise master control system, cooling device (1), temperature stratification heating arrangement (2), multiple temperature sensor (3), ground cold/heat source analogue means (4) and water circulation system, water circulation system is placed in the equipment room outside wind-tunnel, master control system respectively with multiple temperature sensor (3), cooling device (1), temperature stratification heating arrangement (2), ground cold/heat source analogue means (4), water circulation system electric signal connects, water circulation system by pipeline and valve respectively with cooling device (1), ground/Cooling and Heat Source analogue means (4) connects, cooling device (1) is arranged on stable section in wind-tunnel, for controlling stable section outlet air temperature, temperature stratification heating arrangement (2) is arranged on test section in wind-tunnel, for carrying out leveled heating to test section intake air, form gradient temperature, ground cold/heat source analogue means (4) is arranged on test chamber lower wall surface, its upper surface is concordant with test chamber lower wall surface, for simulating ground low-temperature receiver and thermal source, multiple temperature sensor (3) is arranged on the rear of cooling device (1) respectively, before temperature stratification heating arrangement (2), the top on rear and ground cold/heat source analogue means (4), for measure its temperature value in real time and Real-time Feedback to master control system, master control system utilizes the feedback temperature value received to pass through the output of Controlled by Programmable Controller temperature simulation amount, regulate the input temp of the cooled circulated medium entering cooling device (1) and ground cold/heat source analogue means (4), thus the real-time adjustment realized cooling device (1) outlet air temperature and ground cold/heat source analogue means (4) surface temperature, master control system simultaneously regulating and controlling temperature stratification heating arrangement (2) can realize the simulation to atmospheric stratification state.
The present invention also has following technical characteristic: described water circulation system comprises handpiece Water Chilling Units (5), attemperater (6), two pipeline heaters (7.9) and closed cooling tower, cooling device (1) is connected with attemperater (6), cooling device (1) and the connecting tube of attemperater (6) are provided with the first pipeline heater (9), handpiece Water Chilling Units (5) is connected with closed cooling tower (8), handpiece Water Chilling Units (5) is connected with attemperater (6), attemperater (6) is connected with ground cold/heat source analogue means (4), attemperater (6) also with on the connecting tube on ground cold/heat source analogue means (4) is provided with second pipe well heater (7), during work, handpiece Water Chilling Units (5) provides the cooled circulated medium of 0 DEG C, by water pump by the road, valve enters cooling device (1), heat interchange is carried out with air in hole, by arranging the accurate adjustment of coolant temperature that the first pipeline heater (9) realizes entering cooling device (1), ensure that cooling device (1) outlet temperature is 10 DEG C ± 1 DEG C, also flow to ground cold/heat source analogue means (4) simultaneously, when needs in analog plane heat source time, second pipe well heater (7) is opened, after cooled circulated medium being heated to assigned temperature, is delivered to ground cold/heat source analogue means (4), when simulating ground low-temperature receiver, second pipe well heater (7) cuts out, directly cooled circulated medium is delivered in ground cold/heat source analogue means (4), ensures that the surface Working Temperature scope on ground cold/heat source analogue means (4) reaches: 10 DEG C ~ 90 DEG C.
Beneficial effect of the present invention and advantage:
1) wind-tunnel stable section arranges cooling device, and warranty test section temperature in has higher stability and homogeneity, indirectly ensure that the precision of the gradient temperature that test section is formed;
2) water circulation system adopted, is provided with attemperater, ensures system temperature stability, and meanwhile, Set scale variable valve and the bypass of switch control rule variable valve improve running efficiency of system and precision;
3) cooling device adopts elliptical fin tubular type version, while ensureing to have good heat exchange property, has the less pressure loss;
4) temperature stratification heating arrangement adopts structural laminate and control higher slice to control the mode combined, and forms closed-loop control with temperature sensor, while can realizing better thermograde, has acceptable pressure loss value.
6) cold and heat source analogue means in ground has very fast upper temperature characteristics and temperature maintenance, has enough stiffnesses simultaneously, can meet its heat exchange property requirement and support performance requirement.
The present invention has very important realistic meaning for the wind tunnel test of atmospheric pollutant dispersion influence research, can realize the temperature field simulation to testpieces surrounding environment.Along with going deep into atmospheric pollutant dispersion influence research, its application prospect is very wide.
Accompanying drawing explanation
Fig. 1 is the installation site figure of device in system hole;
Fig. 2 is water circulation system fundamental diagram;
Embodiment
Be described further according to Figure of description citing below:
Embodiment 1
As shown in Figure 1, a kind of atmospheric environment wind-tunnel temperature lamination simulation system, comprise master control system, cooling device 1, temperature stratification heating arrangement 2, multiple temperature sensor 3, ground cold/heat source analogue means 4 and water circulation system, water circulation system is placed in the equipment room outside wind-tunnel, master control system respectively with multiple temperature sensor 3, cooling device 1, temperature stratification heating arrangement 2, ground cold/heat source analogue means 4, water circulation system electric signal connects, water circulation system by pipeline and valve respectively with cooling device 1, ground/Cooling and Heat Source analogue means 4 connects, for it provides the cooled circulated medium of certain temperature range, temperature range: 0 DEG C ~ 95 DEG C, cooling device 1 is arranged on stable section in wind-tunnel, for controlling the air themperature entered in test chamber, warranty test section temperature in is 10 DEG C ± 1 DEG C, temperature stratification heating arrangement 2 is arranged on test section in wind-tunnel, for carrying out leveled heating to test section intake air, form gradient temperature, temperature range: 10 DEG C ~ 85 DEG C, ground cold/heat source analogue means 4 is arranged on test chamber lower wall surface, its upper surface is concordant with test chamber lower wall surface, its operating temperature range: 10 DEG C ~ 90 DEG C, multiple temperature sensors 3 are arranged on the rear of cooling device 1 respectively, before temperature stratification heating arrangement 2, the top of rear and ground cold/heat source analogue means 4, for measure its temperature value in real time and Real-time Feedback to master control system, master control system utilizes the feedback temperature value received to pass through the output of Controlled by Programmable Controller temperature simulation amount, regulate the input temp of the cooled circulated medium entering cooling device 1 and ground cold/heat source analogue means 4, thus the real-time adjustment realized cooling device 1 outlet air temperature and ground cold/heat source analogue means 4 surface temperature, master control system simultaneously regulating and controlling temperature stratification heating arrangement 2 thus the simulation realized atmospheric stratification state.
As shown in Figure 2, water circulation system comprises handpiece Water Chilling Units 5, attemperater 6, two pipeline heaters 7.9 and closed cooling tower 8, cooling device 1 is connected with attemperater 6, cooling device 1 and the connecting tube of attemperater 6 are provided with the first pipeline heater 9, handpiece Water Chilling Units 5 is connected with closed cooling tower 8, handpiece Water Chilling Units 5 is connected with attemperater 6, attemperater 6 ground cold/heat source analogue means 4 connects, and attemperater 6 and the connecting tube of ground cold/heat source analogue means 4 are provided with second pipe well heater 7; During work, handpiece Water Chilling Units 5 provides the cooled circulated medium of 0 DEG C, by water pump by the road, valve enters cooling device 1, heat interchange is carried out with air in hole, by arranging the accurate adjustment that the first pipeline heater 9 realizes the coolant temperature entering cooling device 1, ensure that cooling device 1 outlet temperature is 10 DEG C ± 1 DEG C; Simultaneously also flow to ground cold/heat source analogue means 4, when needs in analog plane heat source time, second pipe well heater 7 is opened, after cooled circulated medium being heated to assigned temperature, is delivered to ground cold/heat source analogue means 4; When simulating ground low-temperature receiver, second pipe well heater 7 cuts out, and is directly delivered to by cooled circulated medium in ground cold/heat source analogue means 4, ensures that the surface Working Temperature scope of ground cold/heat source analogue means 4 reaches: 10 DEG C ~ 90 DEG C.
During test, air in wind-tunnel is first through apparatus for supercooling 1, it is made to reach set temperature value, then gradient temperature field is formed through excess temperature stratification heating arrangement 2, thus reach the various Stratification of Lower-layer Atmospheric Temperature state of simulation, finally flow through ground cold/heat source analogue means 4, form complete ambient temperature conditions simulation.The sensor for monitor temperature field is also provided with in wind-tunnel air channel, according to the Temperature numerical that sensor is monitored, the unlatching form selectively of controlled cooling model device 1, temperature stratification heating arrangement 2 and ground cold/heat source analogue means 4 and degree, thus real-time and precise ground regulates wind turbine apparatus temperature environment state.Native system, based on the overall Richardson number of air, can complete the simulation to atmosphere temperature field and ground environment temperature in wind-tunnel.
Claims (2)
1. an atmospheric environment wind-tunnel temperature lamination simulation system, comprise master control system, cooling device (1), temperature stratification heating arrangement (2), multiple temperature sensor (3), ground cold/heat source analogue means (4) and water circulation system, it is characterized in that: water circulation system is placed in the equipment room outside wind-tunnel, master control system respectively with multiple temperature sensor (3), cooling device (1), temperature stratification heating arrangement (2), ground cold/heat source analogue means (4), water circulation system electric signal connects, water circulation system by pipeline and valve respectively with cooling device (1), ground/Cooling and Heat Source analogue means (4) connects, cooling device (1) is arranged on stable section in wind-tunnel, temperature stratification heating arrangement (2) is arranged on test section in wind-tunnel, for carrying out leveled heating to test section intake air, form gradient temperature, ground cold/heat source analogue means (4) is arranged on test chamber lower wall surface, its upper surface is concordant with test chamber lower wall surface, multiple temperature sensor (3) is arranged on the rear of cooling device (1) respectively, before temperature stratification heating arrangement (2), the top on rear and ground cold/heat source analogue means (4), for measure its temperature value in real time and Real-time Feedback to master control system, master control system utilizes the feedback temperature value received to pass through the output of Controlled by Programmable Controller temperature simulation amount, regulate the input temp of the cooled circulated medium entering cooling device (1) and ground cold/heat source analogue means (4), thus the real-time adjustment realized cooling device (1) outlet air temperature and ground cold/heat source analogue means (4) surface temperature, master control system simultaneously regulating and controlling temperature stratification heating arrangement (2) thus the simulation realized atmospheric stratification state.
2. a kind of atmospheric environment wind-tunnel temperature lamination simulation system according to claim 1, it is characterized in that: described water circulation system comprises handpiece Water Chilling Units (5), attemperater (6), two pipeline heaters (7.9) and closed cooling tower (8), cooling device (1) is connected with attemperater (6), cooling device (1) and the connecting tube of attemperater (6) are provided with the first pipeline heater (9), handpiece Water Chilling Units (5) is connected with closed cooling tower (8), handpiece Water Chilling Units (5) is connected with attemperater (6), attemperater (6) is connected with ground cold/heat source analogue means (4), attemperater (6) also with on the connecting tube on ground cold/heat source analogue means (4) is provided with second pipe well heater (7), during work, handpiece Water Chilling Units (5) provides the cooled circulated medium of 0 DEG C, by water pump by the road, valve enters cooling device (1), heat interchange is carried out with air in hole, by arranging the accurate adjustment of coolant temperature that the first pipeline heater (9) realizes entering cooling device (1), ensure that cooling device (1) outlet temperature is 10 DEG C ± 1 DEG C, also flow to ground cold/heat source analogue means (4) simultaneously, when needs in analog plane heat source time, second pipe well heater (7) is opened, after cooled circulated medium being heated to assigned temperature, is delivered to ground cold/heat source analogue means (4), when simulating ground low-temperature receiver, second pipe well heater (7) cuts out, directly cooled circulated medium is delivered in ground cold/heat source analogue means (4), ensures that the surface Working Temperature scope on ground cold/heat source analogue means (4) reaches: 10 DEG C ~ 90 DEG C.
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