CN104122846B - A kind of icing tunnel or the temperature stabilization methods of freezing weather room icing tests - Google Patents
A kind of icing tunnel or the temperature stabilization methods of freezing weather room icing tests Download PDFInfo
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- CN104122846B CN104122846B CN201310144800.6A CN201310144800A CN104122846B CN 104122846 B CN104122846 B CN 104122846B CN 201310144800 A CN201310144800 A CN 201310144800A CN 104122846 B CN104122846 B CN 104122846B
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- icing
- temperature
- gas bypass
- freezing weather
- tunnel
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention belongs to anti-deicing experimental technique field, relate to a kind of temperature stabilization methods being applicable to during ground simulation icing tests in the case of short time big heat load.When carrying out the icing tests of icing tunnel or freezing weather indoor, spraying under certain low temperature environment, the hot water now sprayed into and hot-air can produce big thermic load at short notice, make ambient temperature produce larger fluctuation, affect test effect.For solving this problem, system arranges hot-gas bypass, it is ensured that compressor runs all the time, possesses the condition of fast upload.This method is implemented simple, respond well, it is possible to admirably achieve the effect of temperature stabilization.
Description
Technical field
The invention belongs to anti-deicing experimental technique field, when relating to a kind of icing tunnel or freezing weather room icing tests in short-term
Between temperature stabilization methods in the case of big heat load.
Background technology
The anti-clearing ice technology of aircraft is most important for flight safety.In order to effectively verify the effect of anti-deicing product, it is necessary to
Carry out ground experiment checking.The present invention is to be applied to anti-deicing ground simulation test equipment icing tunnel or the one of freezing weather room
Temperature-controlled process.Owing to current icing tunnel spraying system generally uses air atomizer spray nozzle, and due to Cloud Particles diameter
Require less, so the flow of air and pressure are the biggest.So, in icing tunnel icing tests, can be in the short time during spraying
Inside spray into substantial amounts of air and water；Simultaneously in order to ensure that nozzle will not be frozen, water and air has all carried out heat treated.Cause
This, a large amount of thermic loads produced at short notice will produce impact to ambient temperature, causes bigger temperature fluctuation, needs one
The fixed time could recover normal assays temperature, thus causes the test data in during this period of time untrue, even affects
Whole result of the test.The present invention, just for this situation, takes measures to ensure that the temperature under short time big load condition is steady
Fixed, do not affect test effect, efficiently solve in icing tests such issues that.
Summary of the invention
It is an object of the invention to: provide a kind of temperature being applicable to during icing tests in the case of short time big heat load steady
Determine method, the temperature fluctuation in spray process when being effectively reduced test, it is ensured that the temperature stabilization of process of the test.
The technical scheme is that in process of the test, when the ambient temperature of icing tunnel or freezing weather indoor reaches examination
Test when requiring, spraying will be started.Now, a large amount of hot water and air sprayed into necessarily causes icing tunnel or freezing weather indoor
Cooling load increases suddenly.And temperature sensor transmission signal is delayed, it is delayed that valve etc. controls element execution action, and system
The multiple factors impacts such as cold compressor unlatching and upload time, cause the whole refrigeration system response lag to big load, it is impossible to
Realize the fast and stable of test temperature.
For solving problems, a kind of icing tunnel or the temperature stabilization methods of freezing weather room icing tests, the method
System is provided that
In the refrigeration system of icing tunnel or freezing weather room, heat is set between refrigeration compressor exhaust end to condenser
Gas bypass valve, configures corresponding pipeline, and thermal source is incorporated into the evaporator end of system；Hot gas bypass valve is provided with control system.
This method comprises the following steps:
The first step, in real time monitoring icing tunnel or the temperature of freezing weather indoor, when temperature reaches higher than design temperature 1 DEG C
Time, control system opens the hot gas bypass valve in refrigeration system；
Second step, finely tunes hot gas bypass valve flux, maintains the temperature stabilization of icing tunnel or freezing weather indoor setting temperature
Degree；
3rd step, keeps the lasting unlatching of the fluorine pump of refrigeration system, is not adjusted the liquid supply rate of fluorine pump；
4th step, when unlatching spray valve starts to spray, closes rapidly hot gas bypass valve；
5th step, is finely adjusted the refrigeration compressor of refrigeration system, it is ensured that recover stable in the trial zone temperature short time,
Meet test requirements document.
The present invention has the advantage that and provides the benefit that: system configuration is simple, easy and simple to handle, it is possible to effectively to realize ground
During simulation icing tests spraying, the fast and stable of temperature in test bay, reduces the temperature fluctuation impact on result of the test, it is ensured that examination
Test the effectiveness of result.
Detailed description of the invention
Below the present invention is described in further details.
This method is by arranging hot-gas bypass, it is ensured that compressor runs all the time, possesses the condition of fast upload.Work as test chamber
Before space cooling reaches requirement compressor off-load, the hot gas bypass valve of unit automatically turns on, and regulation hot-gas bypass amount keeps indoor
Temperature.Guaranteeing compressor heavy-duty service, (the liquid supply rate to fluorine pump does not carries out PLC trace control, protects the most persistently to open fluorine pump
Card end continues feed flow).When spraying water spray load adds suddenly, simultaneously closing off hot gas bypass valve, compressor only need to finely tune load,
Other parts of system need not significantly regulate.Realize the fast and stable of test chamber temperature.
The system of the method is provided that refrigeration system uses screw compression host machine, fluorine pump feed liquid way, mainly includes system
Cold compressor, condenser, fluorine barrel pump unit and vaporizer.In the refrigeration system of icing tunnel or freezing weather room, in refrigeration
Compressor air-discharging end arranges hot gas bypass valve between condenser, configures corresponding pipeline, and thermal source is incorporated into the evaporation of system
Device end；Hot gas bypass valve is provided with control system.
This method comprises the following steps:
The first step, in real time monitoring icing tunnel or the temperature of freezing weather indoor, when temperature reaches higher than design temperature 1 DEG C
Time, control system opens the hot gas bypass valve in refrigeration system；
Second step, finely tunes hot gas bypass valve flux, maintains the temperature stabilization of icing tunnel or freezing weather indoor setting temperature
Degree；
3rd step, keeps the lasting unlatching of the fluorine pump of refrigeration system, is not adjusted the liquid supply rate of fluorine pump；
4th step, when unlatching spray valve starts to spray, closes rapidly hot gas bypass valve；
5th step, is finely adjusted the refrigeration compressor of refrigeration system, it is ensured that recover stable in the trial zone temperature short time,
Meet test requirements document.
Embodiment 1:
Carrying out product icing tests in icing tunnel, set test temperature as-30 DEG C, spray water content requirement is 1.5g/
m3.Refrigeration system continuous firing, carries out pre-cooling, and when the temperature of icing mnncl tcst section is down to-29 DEG C, hot gas bypass valve is opened automatically
Open.According to the open amount of practical situation regulation hot gas bypass valve, the temperature in icing tunnel slowly declines, and is maintained at-30 DEG C.Will
Fluorine pump remains at opening, is not controlled the liquid supply rate of fluorine pump.Now start spraying and carry out icing tests, spraying
After valve is opened, close rapidly hot gas bypass valve, run under the state that compressor remains at heavy load, only need to finely tune load,
Quickly reach optimal operational condition.Although having substantial amounts of hot water and hot-air to spray into, but the temperature of icing mnncl tcst section being in 10s
I.e. returning to normal condition, overall temperature fluctuation is in the range of ± 1 DEG C, it is achieved the fast and stable of test chamber temperature, it is ensured that
The test effect of icing mnncl tcst.
Claims (1)
1. icing tunnel or a temperature stabilization methods for freezing weather room icing tests, is characterized in that, the system of the method is arranged
As follows:
In the refrigeration system of icing tunnel or freezing weather room, arrange by steam between refrigeration compressor exhaust end to condenser
Logical valve, configures corresponding pipeline, thermal source is incorporated into the evaporator end of system, and hot gas bypass valve is provided with control system；
This method comprises the following steps:
The first step, in real time monitoring icing tunnel or the temperature of freezing weather indoor, when temperature reaches higher than design temperature 1 DEG C, control
System processed opens the hot gas bypass valve in refrigeration system；
Second step, finely tunes hot gas bypass valve flux, maintains the temperature stabilization of icing tunnel or freezing weather indoor at design temperature；
3rd step, keeps the lasting unlatching of the fluorine pump of refrigeration system, is not adjusted the liquid supply rate of fluorine pump；
4th step, when unlatching spray valve starts to spray, closes rapidly hot gas bypass valve；
5th step, is finely adjusted the refrigeration compressor of refrigeration system, it is ensured that recovers stable in the trial zone temperature short time, meets
Test requirements document.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310144800.6A CN104122846B (en) | 2013-04-24 | 2013-04-24 | A kind of icing tunnel or the temperature stabilization methods of freezing weather room icing tests |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310144800.6A CN104122846B (en) | 2013-04-24 | 2013-04-24 | A kind of icing tunnel or the temperature stabilization methods of freezing weather room icing tests |
Publications (2)
| Publication Number | Publication Date |
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| CN104122846A CN104122846A (en) | 2014-10-29 |
| CN104122846B true CN104122846B (en) | 2016-12-28 |
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| CN201310144800.6A Active CN104122846B (en) | 2013-04-24 | 2013-04-24 | A kind of icing tunnel or the temperature stabilization methods of freezing weather room icing tests |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105277485B (en) * | 2015-09-24 | 2017-08-25 | 空气动力学国家重点实验室 | It is a kind of to determine ice and the device of object plane cohesive force |
| CN109733639A (en) * | 2018-12-11 | 2019-05-10 | 武汉航空仪表有限责任公司 | A kind of freezing weather room flow field rock-steady structure |
| CN110395406A (en) * | 2019-07-11 | 2019-11-01 | 中国空气动力研究与发展中心低速空气动力研究所 | The anti-deicing of icing wind tunnel supplies control system |
| CN113919083B (en) * | 2021-12-14 | 2022-06-24 | 中国飞机强度研究所 | Large aircraft test steady-state load analysis method under multi-environmental-factor condition |
| CN117313183B (en) * | 2023-11-28 | 2024-02-02 | 北京理工大学 | Method for establishing digital twin system |
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| US5878583A (en) * | 1997-04-01 | 1999-03-09 | Manitowoc Foodservice Group, Inc. | Ice making machine and control method therefore |
| CN101737988B (en) * | 2009-12-09 | 2012-08-22 | 泰豪科技股份有限公司 | Wide temperature range type full fresh air temperature-adjustable dehumidifier |
| CN102635990B (en) * | 2012-05-11 | 2014-08-13 | 杭州雪中炭恒温技术有限公司 | Refrigerating output control device and test device and control method using the refrigerating output control device |
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