CN109783966A - Improved method and device of the Calpuff model to light gas diffusion simulations - Google Patents
Improved method and device of the Calpuff model to light gas diffusion simulations Download PDFInfo
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Abstract
Present disclose provides a kind of Calpuff models to the improved method of light gas diffusion simulations, obtains accident source information and environmental information, and be collected with environmental information to accident source information；Operation is optimized with sinking speed parameter to the height of release parameter during collection；Parameter after optimization is input in Calpuff model, light gas concentration field result is obtained.Calpuff model of this method after two parameter optimizations of height of release and sinking speed can be suitable for simulating the diffusion mobility of light gas, quickly carry out dynamic analog to the leakage accident of light gas so as to more convenient；Parameter inside the formula of the parameter optimization of proposition is easier to obtain, so as in leakage accident to collect necessary data in the shorter time, to realize the dynamic analog of leakage accident.The disclosure additionally provides Calpuff model to the improvement device of light gas diffusion simulations.
Description
Technical field
This disclosure relates to the present invention relates to the dynamic Simulation Techniques field of light gas Release and dispersion, in particular to
The improved method and device of a kind of Calpuff model to light gas diffusion simulations.
Background technique
Nowadays there is various dangerous substances in production, storage, transport and use process for petroleum, chemical company.These
Dangerous substance wherein just comprising light gas, due to discharge after it is smaller than atmospheric density, under the action of buoyancy, compared to common
Gas has apparent lifting；It also can conveying and diffusion to light gas by the turbulent flow reflex from boundary layer
Generate certain influence.Detailed process is as follows: when continuous release occurs for light gas, it is formed by plume due to depositing between air
In density contrast, the phenomenon that plume has obvious rising under the action of buoyancy；And when the initial temperature for leaking light gas is higher than sky
When gas, this plume effect of increasing be will become apparent from.Under the action of cardinal wind, the downward wind direction of the plume of rising is curved
Song forms a typical bending plume.It needs to calculate effective source of leaks height of plume at this time；From ground surface and
Obviously also the conveying to light gas and diffusion generate certain influence to the auspicious stream reflex in boundary layer.Therefore surface condition
It is different with required calculating light gas concentration be it is closely bound up, such as the diffusion in high density settling pond region and wilderness area, finally
The regional scope of influence is obviously different.
Calpuff model is the Gaussian cigarette group diffusion for being used to simulate the multilayer of unstable state, several species pollution
Mode, it is suitable for simulating the migration, conversion and removing of space-time pollutant all under the meteorological condition of variation.It considers complexity
The boundary of the influence of landform, seashore influences, and washes influence, dried wet deposition and simple chemical conversion, Ke Yiji under building
Calculate the concentration and settling amount in preset.But there is centainly restricted for current Calpuff model.Specifically,
For the lifting after light gas discharge: Calpuff model can consider to pollute when calculating gaseous pollutant height of release
Object causes lifting to a certain extent since temperature is less than air themperature, but for light gas, not only its density of temperature with
There are density contrasts for air, obvious rising are had under buoyancy, Calpuff model can not simulate this characteristic；For lightweight
The diffusion phase of gas: Calpuff model is regarded pollutant air mass density as close with air after the lifting of gas has been calculated
Quite, pollutant air mass is spread degree with aerial migration, but for light gas, is more vulnerable to from ground surface and boundary layer
Turbulent flow reflex, cause light gas to have a degree of subsidence velocity, Calpuff model after the reflection in boundary layer
This characteristic can not be simulated.
Summary of the invention
The technical issues of in order to solve in the prior art, the disclosure is directed to the light gas of different characteristic, to Calpuff mould
The parameter of type is adjusted, so that Calpuff can be realized simulation light gas diffusion mobility.I.e. the embodiment of the present disclosure provides
A kind of Calpuff model obtains accident source information and environmental information to the improved method and device of light gas diffusion simulations, and
Accident source information is collected with environmental information；To during collection height of release parameter and sinking speed parameter carry out it is excellent
Change operation；Parameter after optimization is input in Calpuff model, light gas concentration field result is obtained.By height of release
With the Calpuff model after two parameter optimizations of sinking speed, it can be suitable for simulating the diffusion mobility of light gas, so as to
It is enough more convenient quickly to the leakage accident progress dynamic analog of light gas；Parameter inside the formula of the parameter optimization of proposition
It is easier to obtain, so as to, to collect necessary data in the shorter time, leak in leakage accident to realize
The dynamic analog of accident.
In a first aspect, the embodiment of the present disclosure provides a kind of Calpuff model to the improvement side of light gas diffusion simulations
Method, comprising the following steps: obtain accident source information and environmental information, and the accident source information and the environmental information are carried out
It collects；Operation is optimized with sinking speed parameter to the height of release parameter during collection；By the parameter input after optimization
Into Calpuff model, light gas concentration field result is obtained.
The accident source information includes: the row of the height of release of light gas, light gas in one of the embodiments,
Put the discharge amount of temperature, the mass rate of emission of light gas and light gas.
In one of the embodiments, the environmental information include: ambient wind velocity, Mohs length, friction velocity, season/
Underlying surface.
It collects and the height of release parameter and sinking speed ginseng in preprocessing process for described pair in one of the embodiments,
It includes: high for light gas calculating buoyance flux and the lifting for calculating rising for light gas that number, which optimizes operation,
Degree.
It collects and the height of release parameter and sinking speed ginseng in preprocessing process for described pair in one of the embodiments,
Number optimizes operation further include:
According to the source of leaks parameter of light gas, the rising height risen is calculated by the first preset formula, wherein described
First preset formula are as follows:
Wherein, x is lower wind direction distance (m), and u is ambient wind velocity (m/s), and the additional rising height of light gas is with lower wind direction
Distance increases and increases, and Δ H is the rising height of the rising as caused by light gas；
The input value of the height of release in Calpuff model is calculated by the second preset formula, wherein described second is default
Formula are as follows: Hi=Hs+ΔH；
Wherein, HsFor actual discharge height (m), HiFor the height of release (m) inputted in Calpuff model；
Buoyance flux is calculated according to third preset formula, wherein the third preset formula are as follows:Its
In, VsIt is acceleration of gravity (m/s for flue gas emission rate (m/s) at exhaust outlet, g2), TsFor flue gas exit temperature (K), Ta
For ambient air temperature (K).
It collects and the height of release parameter and sinking speed ginseng in preprocessing process for described pair in one of the embodiments,
Number optimizes operation further include:
According to the environmental information, the sinking speed of gas, the sinking speed V of calculating are calculated based on the 4th preset formulad
As the input value of the gas USED TO ESTIMATE DRY DEPOSITION VELOCITY in Calpuff model, the 4th preset formula are as follows:
Wherein, Ra--- turbosphere aerodynamic drag, Rb--- quasi- laminar flow pair layer resistance；RaIt is to be drawn by turbulent motion
The resistance being subject to when the pollutant risen is from Atmospheric Transportation to Near Ground, according to surface layer by the mass transport and heat of pollutant
It conveys similar hypothesis and obtains the 5th preset formula, wherein the 5th preset formula are as follows:
Wherein, ZrIt is to calculate VdWhen the reference altitude (m) that selects, UaIt is friction velocity (m/s), k is that Von Karman is normal
Number, takes 0.4, Z0Be underlying surface roughness it is long, (m) is empirically obtained by local features of terrain, ψcIt is related with mass flux
Stability correction function,
Wherein,1/L is the inverse (1/m) of Monin-Obukhov length；
RbPollutant to when surficial deposit by resistance suffered by laminar film near the ground, and by connecting with earth's surface
The transmission of class laminar film is associated；
Wherein, UaIt is friction velocity (m/s), k is Von Karman constant, takes 0.4, PrFor Prandtl number, value 0.72,
ScFor Schmidt number, Sc=μ0/Di, μ0For air movement viscosity, value 0.15cm2s-1, DiFor the 1st kind of dirt relevant to component
Contaminate the molecule diffusance of object.
In one of the embodiments, further include: by judging that multiple underlying surface types of multiple seasons obtain receptor surface
Resistance.
Second aspect, the embodiment of the present disclosure provide a kind of computer readable storage medium, are stored thereon with computer journey
The step of sequence, which realizes above-mentioned method when being executed by processor.
The third aspect, the embodiment of the present disclosure provide a kind of computer equipment, including memory, processor and are stored in
On reservoir and the computer program that can run on a processor, the processor realize above-mentioned method when executing described program
Step.
Fourth aspect, the embodiment of the present disclosure provide a kind of Calpuff model and fill to the improvement of light gas diffusion simulations
It sets, described device includes: acquisition and collection module, is believed for obtaining accident source information and environmental information, and to the accident source
Breath is collected with the environmental information；Optimization module, for the height of release parameter and sinking speed ginseng during collection
Number optimizes operation；As a result module is obtained, for the parameter after optimization to be input in Calpuff model, obtains lightweight gas
Bulk concentration field result.
A kind of Calpuff model provided by the invention obtains thing to the improved method and device of light gas diffusion simulations
Therefore source information and environmental information, and accident source information is collected with environmental information；To the height of release ginseng during collection
It is several to optimize operation with sinking speed parameter；Parameter after optimization is input in Calpuff model, it is dense to obtain light gas
Spend field result.Calpuff model of this method after two parameter optimizations of height of release and sinking speed, can be suitable for mould
The diffusion mobility of quasi- light gas quickly carries out dynamic analog to the leakage accident of light gas so as to more convenient；It mentions
Parameter inside the formula of parameter optimization out is easier to obtain, so as in leakage accident in the shorter time
Necessary data were collected, to realize the dynamic analog of leakage accident.
Detailed description of the invention
In order to illustrate more clearly of the technical solution of the embodiment of the present disclosure, below to needed in embodiment description
Attached drawing is briefly described:
Fig. 1 is improved method of one of the one embodiment of the invention Calpuff model to light gas diffusion simulations
Step flow diagram；
Fig. 2 is improved method of one of another embodiment of the present invention Calpuff model to light gas diffusion simulations
Step flow diagram；
Fig. 3 is improved method of one of the one embodiment of the invention Calpuff model to light gas diffusion simulations
In lower wind direction center line on it is maximum when equal concentration change schematic diagram；
Fig. 4 is improved method of one of the one embodiment of the invention Calpuff model to light gas diffusion simulations
In leeward to the ground when equal concentration field schematic diagram；
Fig. 5 is improvement device of one of the one embodiment of the invention Calpuff model to light gas diffusion simulations
Structural schematic diagram.
Specific embodiment
The application is further discussed in detail with reference to the accompanying drawings and examples.
In following introductions, term " first ", " second " only for descriptive purposes, and should not be understood as instruction or dark
Show relative importance.Following introductions provide multiple embodiments of the disclosure, can replace or merge between different embodiments
Combination, therefore the application is it is also contemplated that all possible combinations comprising documented identical and/or different embodiments.Thus, such as
Fruit one embodiment include feature A, B, C, another embodiment include feature B, D, then the application also should be regarded as include containing
A, the every other possible combined embodiment of one or more of B, C, D, although the embodiment may be in the following contents
In have specific literature record.
In order to make the objectives, technical solutions, and advantages of the present invention clearer, by the following examples, it and combines attached
Figure, to a kind of Calpuff model of the present invention to the specific embodiment of the improved methods of light gas diffusion simulations and device into
Row is further described.It should be appreciated that described herein, specific examples are only used to explain the present invention, is not used to limit
The present invention.
As shown in Figure 1, being one of one embodiment Calpuff model to the improved method of light gas diffusion simulations
Flow diagram, specifically includes the following steps:
Step 102, accident source information and environmental information are obtained, and accident source information is collected with environmental information.Tool
Body, accident source information includes: the mass rate of emission of the height of release of light gas, the exhaust temperature of light gas, light gas
And the discharge amount of light gas.The diversity and selectivity of the accident source information acquisition for light gas are improved as a result,.
In addition, environmental information includes: ambient wind velocity, Mohs length, friction velocity, season/underlying surface.Environmental information is improved as a result,
Multi-selection.
Step 104, operation is optimized with sinking speed parameter to the height of release parameter during collection.It needs to illustrate
, include calculating buoyance flux and calculating the rising height risen in height of release parameter optimization；Sinking speed parameter is excellent
Change includes calculating turbulent motion resistance, calculate resistance near the ground and calculating receptor surface resistance.Specifically, to collecting and pre- place
It includes: to calculate buoyance flux for light gas that height of release parameter and sinking speed parameter during reason, which optimize operation,
And the rising height risen is calculated for light gas.
Further, operation is optimized with sinking speed parameter to collection and the height of release parameter in preprocessing process
Further include:
According to the source of leaks parameter of light gas, the rising height risen is calculated by the first preset formula, wherein first
Preset formula are as follows:
Wherein, x is lower wind direction distance (m), and u is ambient wind velocity (m/s), and the additional rising height of light gas is with lower wind direction
Distance increases and increases, and Δ H is the rising height of the rising as caused by light gas；
The input value of the height of release in Calpuff model is calculated by the second preset formula, wherein the second preset formula
Are as follows: Hi=Hs+ΔH；
Wherein, HsFor actual discharge height (m), HiFor the height of release (m) inputted in Calpuff model；
Buoyance flux is calculated according to third preset formula, wherein the third preset formula are as follows:Its
In, VsIt is acceleration of gravity (m/s for flue gas emission rate (m/s) at exhaust outlet, g2), TsFor flue gas exit temperature (K), Ta
For ambient air temperature (K).
Further, behaviour is optimized with sinking speed parameter to collection and the height of release parameter in preprocessing process
Make further include:
According to environmental information, the sinking speed of gas, the sinking speed V of calculating are calculated based on the 4th preset formuladAs
The input value of gas USED TO ESTIMATE DRY DEPOSITION VELOCITY in Calpuff model, the 4th preset formula are as follows:
Wherein, Ra--- turbosphere aerodynamic drag, Rb--- quasi- laminar flow pair layer resistance；RaIt is to be drawn by turbulent motion
The resistance being subject to when the pollutant risen is from Atmospheric Transportation to Near Ground, according to surface layer by the mass transport and heat of pollutant
It conveys similar hypothesis and obtains the 5th preset formula, wherein the 5th preset formula are as follows:
Wherein, ZrIt is to calculate VdWhen the reference altitude (m) that selects, UaIt is friction velocity (m/s), k is that Von Karman is normal
Number, takes 0.4, Z0Be underlying surface roughness it is long, (m) is empirically obtained by local features of terrain, ψcIt is related with mass flux
Stability correction function,
Wherein,1/L is the inverse (1/m) of Monin-Obukhov length；
RbPollutant to when surficial deposit by resistance suffered by laminar film near the ground, and by connecting with earth's surface
The transmission of class laminar film is associated；
Wherein, UaIt is friction velocity (m/s), k is Von Karman constant, takes 0.4, PrFor Prandtl number, value 0.72,
ScFor Schmidt number, Sc=μ0/Di, μ0For air movement viscosity, value 0.15cm2s-1, DiFor the 1st kind of dirt relevant to component
Contaminate the molecule diffusance of object.
In addition it is also necessary to illustrate, improvement of the Calpuff model to light gas diffusion simulations involved in the disclosure
Method further include: by judging that multiple underlying surface types of multiple seasons obtain receptor surface resistance.
Step 106, the parameter after optimization is input in Calpuff model, obtains light gas concentration field result.
A kind of Calpuff model provided by the invention obtains accident source letter to the improved method of light gas diffusion simulations
Breath and environmental information, and accident source information is collected with environmental information；To the height of release parameter during collection and sink
Drop speed parameter optimizes operation；Parameter after optimization is input in Calpuff model, light gas concentration field knot is obtained
Fruit.Calpuff model of this method after two parameter optimizations of height of release and sinking speed can be suitable for simulation lightweight
The diffusion mobility of gas quickly carries out dynamic analog to the leakage accident of light gas so as to more convenient；The ginseng of proposition
Number optimization formula inside parameter be easier to obtain, so as in leakage accident to be collected in the shorter time
Necessary data, to realize the dynamic analog of leakage accident.
Light gas is expanded with a kind of Calpuff model proposed with the disclosure in order to more precisely, neatly understand
The improved method of simulation is dissipated, following example is carried out.It should be noted that the range that the disclosure is protected is not limited to following example.
It should be noted that Schmidt the and Prandtl number of usually gas is related to molecular weight, with specific reference to table 1, i.e.,
Table 1 is for Schmidt the and Prandtl number of several gases and relative to water diffusion coefficient ratio.
In addition it is also necessary to explanation, RcIt is receptor surface resistance, includes other a variety of resistances, usually not by judgement
It is obtained with season different underlying surface type.Meaning as shown in table 2.The skin resistance suffered when depositing of the various underlying surfaces of table 2.
Specifically, i.e. Fig. 2 is one of another embodiment of the present invention Calpuff model to lightweight in conjunction with shown in Fig. 2-4
The step flow diagram of the improved method of gas diffusion simulation；Fig. 3 is one of one embodiment of the invention Calpuff mould
Type is to equal concentration changes schematic diagram when maximum on the lower wind direction center line in the improved method of light gas diffusion simulations；Fig. 4 is
One of one embodiment of the invention Calpuff model to the leeward in the improved method of light gas diffusion simulations to the ground
When equal concentration field schematic diagram.For the test of ammonia toxic in document, toxic ammonia is on daytime because contingency generation is continuously let out
Leakage, source strength 20kg/s, leakage initial rate are 1.5m/s, and practical leakage height is 3m, define ammonia and the atmospheric environment temperature difference
The factor is 0.1, and wind speed is 4m/s, atmospheric stability C, surface roughness 0.5m when accident occurs.
Firstly, being calculated about height of release, the parameter arrived according to on-site collection, calculating buoyance flux F firstb:
Then it calculates and discharges height as caused by light gas
Spend incrementss Δ H.
Δ H=1.6 × 1.471/3×4-1×(3×10)2/3=4.4；The then height of release H Jing Guo parameter optimizationi=Hs+
Δ H=3+4.4=7.4.
Further, it is calculated about sinking speed, the parameter arrived according to on-site collection, calculates caused by turbulent motion first
Pollutant from Atmospheric Transportation to Near Ground when the resistance R that is subject toa:
Then calculate pollutant to when surficial deposit by resistance R suffered by laminar film near the groundb.I.e.Then receptor surface resistance R is judged according to live season and underlying surface typec；Rc=0；
Finally calculate light gas USED TO ESTIMATE DRY DEPOSITION VELOCITY Vd；
In conclusion Calpuff calculated result and with measured result compare, by the height of release of above-mentioned calculating and sedimentation speed
Degree is inputted as Calpuff model parameter, finally obtains the concentration field of this leakage accident liquid chlorine.According to national health department's phase
Regulation is closed, when ammonia concentration reaches 30mg/m3When, there is minor response in human body；Reach 350mg/m3When, it is anti-that moderate occurs in human body
It answers；Reach 550mg/m3When, there is kickback in human body；Reach 1500mg/m3When, it may cause death after contacting a period of time；
When concentration is greater than 3500mg/m3When, then it is dead immediately after may sucking.Simulation is calculated according to this five toxicity thresholds
Ammonia concentration influence area is divided, away from source of leaks from closely to far being successively divided into: lethal zone, dead area, strong immediately
Reaction zone, moderate reaction zone and minor response area.As shown in table 3, i.e. the simulation of table 3 calculates concentration and document experimental concentration pair
Than.
As can be seen from the above results, in addition to minor response area, the length of the different threshold ranges of Calpuff estimation before improving
Degree is all larger than document test value, and the length is coincide with document test value substantially after improving, and is illustrated into excessively improved Calpuff
Model can be good at simulating light gas.
In summary, the invention discloses a kind of improved method based on Calpuff modeling light gas, propositions pair
The input parameter height of release and USED TO ESTIMATE DRY DEPOSITION VELOCITY of Calpuff model carry out parameter optimization, finally utilize Calpuff model dynamic
Simulate the diffusion mobility of light gas.Test result shows: the algorithm can simulate light gas diffusion mobility characteristic well.
The disclosure is adjusted the parameter of Calpuff model for the light gas of different characteristic by a kind of algorithm, so that
Calpuff can be realized simulation light gas diffusion mobility.To two parameters of height of release in Calpuff model and sinking speed
It optimizes, to realize simulation of the Calpuff model for light gas.
Based on the same inventive concept, a kind of Calpuff model is additionally provided to the improvement device of light gas diffusion simulations.
The principle solved the problems, such as due to this device is with a kind of aforementioned Calpuff model to the improved method phase of light gas diffusion simulations
Seemingly, therefore, the implementation of the device can realize that overlaps will not be repeated according to the specific steps of preceding method.
As shown in figure 5, being one of one embodiment Calpuff model to the improvement device of light gas diffusion simulations
Structural schematic diagram.The Calpuff model includes: acquisition and collection module to the improvement device 10 of light gas diffusion simulations
200, optimization module 400 and result obtain module 600.
Wherein, it obtains with collection module 200 for obtaining accident source information and environmental information, and to accident source information and ring
Border information is collected；Optimization module 400 is used to carry out the height of release parameter during collection with sinking speed parameter excellent
Change operation；As a result it obtains module 600 to be used to for the parameter after optimization being input in Calpuff model, obtains light gas concentration
Field result.
A kind of Calpuff model provided by the invention passes through acquisition to the improvement device of light gas diffusion simulations first
Accident source information and environmental information are obtained with collection module, and accident source information is collected with environmental information；Again by excellent
Change module and operation is optimized with sinking speed parameter to the height of release parameter during collection；Mould is obtained eventually by result
Parameter after optimization is input in Calpuff model by block, obtains light gas concentration field result.The device passes through height of release
With the Calpuff model after two parameter optimizations of sinking speed, it can be suitable for simulating the diffusion mobility of light gas, so as to
It is enough more convenient quickly to the leakage accident progress dynamic analog of light gas；Parameter inside the formula of the parameter optimization of proposition
It is easier to obtain, so as to, to collect necessary data in the shorter time, leak in leakage accident to realize
The dynamic analog of accident.
The embodiment of the invention also provides a kind of computer readable storage medium, stored on the computer readable storage medium
There is computer program, which is executed by processor in Fig. 1 and Fig. 2.The embodiment of the invention also provides a kind of comprising instruction
Computer program product.When the computer program product is run on computers, so that computer executes above-mentioned Fig. 1 and Fig. 2
Method.
Those of ordinary skill in the art will appreciate that realizing all or part of the process in above-described embodiment method, being can be with
Relevant hardware is instructed to complete by computer program, the program can be stored in a computer-readable storage medium
In, the program is when being executed, it may include such as the process of the embodiment of above-mentioned each method.Wherein, the storage medium can be magnetic
Dish, CD, read-only memory (Read-Only Memory, ROM) or random access memory (Random Access
Memory, RAM) etc..The embodiments described above only express several embodiments of the present invention, and description is more specific and detailed
Carefully, but it cannot be understood as limitations on the scope of the patent of the present invention.It should be pointed out that for the common skill of this field
For art personnel, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to this hair
Bright protection scope.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.For the mesh of example and description
Have been presented for above description.This description is not intended to for embodiment of the disclosure to be restricted to form disclosed herein.Although with
On discussed multiple exemplary aspects and embodiment, but those skilled in the art will appreciate that its certain modification, modify, change
Change, addition and sub-portfolio.
Claims (10)
1. a kind of Calpuff model is to the improved method of light gas diffusion simulations, which comprises the following steps:
Acquisition accident source information and environmental information, and the accident source information is collected with the environmental information；
Operation is optimized with sinking speed parameter to the height of release parameter during collection；
Parameter after optimization is input in Calpuff model, light gas concentration field result is obtained.
2. Calpuff model according to claim 1 is to the improved method of light gas diffusion simulations, which is characterized in that
The accident source information include: the height of release of light gas, the exhaust temperature of light gas, light gas mass rate of emission with
And the discharge amount of light gas.
3. Calpuff model according to claim 1 is to the improved method of light gas diffusion simulations, which is characterized in that
The environmental information includes: ambient wind velocity, Mohs length, friction velocity, season/underlying surface.
4. Calpuff model according to claim 1 is to the improved method of light gas diffusion simulations, which is characterized in that
It includes: for lightweight that described pair of collection, which optimizes operation with sinking speed parameter with the height of release parameter in preprocessing process,
Gas calculates buoyance flux and calculates the rising height risen for light gas.
5. Calpuff model according to claim 1 is to the improved method of light gas diffusion simulations, which is characterized in that
It collects for described pair and optimizes operation with sinking speed parameter with the height of release parameter in preprocessing process further include:
According to the source of leaks parameter of light gas, the rising height risen is calculated by the first preset formula, wherein described first
Preset formula are as follows:
Wherein, x is lower wind direction distance (m), and u is ambient wind velocity (m/s), and the additional rising height of light gas is with lower wind direction distance
Increase and increase, Δ H is the rising height of the rising as caused by light gas；
The input value of the height of release in Calpuff model is calculated by the second preset formula, wherein second preset formula
Are as follows: Hi=Hs+ΔH；
Wherein, HsFor actual discharge height (m), HiFor the height of release (m) inputted in Calpuff model；
Buoyance flux is calculated according to third preset formula, wherein the third preset formula are as follows:Wherein, Vs
It is acceleration of gravity (m/s for flue gas emission rate (m/s) at exhaust outlet, g2), TsFor flue gas exit temperature (K), TaFor environment
Atmospheric temperature (K).
6. Calpuff model according to claim 1 is to the improved method of light gas diffusion simulations, which is characterized in that
It collects for described pair and optimizes operation with sinking speed parameter with the height of release parameter in preprocessing process further include:
According to the environmental information, the sinking speed of gas, the sinking speed V of calculating are calculated based on the 4th preset formuladAs
The input value of gas USED TO ESTIMATE DRY DEPOSITION VELOCITY in Calpuff model, the 4th preset formula are as follows:
Wherein, Ra--- turbosphere aerodynamic drag, Rb--- quasi- laminar flow pair layer resistance；RaIt is as caused by turbulent motion
The resistance being subject to when pollutant is from Atmospheric Transportation to Near Ground is conveyed according to surface layer by the mass transport and heat of pollutant
Similar hypothesis obtains the 5th preset formula, wherein the 5th preset formula are as follows:
Wherein, ZrIt is to calculate VdWhen the reference altitude (m) that selects, UaIt is friction velocity (m/s), k is Von Karman constant, is taken
0.4, Z0Be underlying surface roughness it is long, (m) is empirically obtained by local features of terrain, ψcFor stabilization related with mass flux
Correction function is spent,
Wherein,1/L is the inverse (1/m) of Monin-Obukhov length；
RbPollutant to when surficial deposit by resistance suffered by laminar film near the ground, and the such sheets by connecting with earth's surface
The transmission of fluid layer is associated；
Wherein, UaIt is friction velocity (m/s), k is Von Karman constant, takes 0.4, PrFor Prandtl number, value 0.72, ScFor
Schmidt number, Sc=μ0/Di, μ0For air movement viscosity, value 0.15cm2s-1, DiFor the 1st kind of pollutant relevant to component
Molecule diffusance.
7. Calpuff model according to claim 6 is to the improved method of light gas diffusion simulations, which is characterized in that
Further include: by judging that multiple underlying surface types of multiple seasons obtain receptor surface resistance.
8. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the program is held by processor
The step of any one of claim 1-7 the method is realized when row.
9. a kind of computer equipment including memory, processor and stores the meter that can be run on a memory and on a processor
Calculation machine program, which is characterized in that the processor realizes side described in any one of described claim 1-7 when executing described program
The step of method.
10. a kind of Calpuff model is to the improvement device of light gas diffusion simulations accuracy, which is characterized in that described device
Include:
Acquisition and collection module, for obtaining accident source information and environmental information, and to the accident source information and the environment
Information is collected；
Optimization module, for optimizing operation with sinking speed parameter to the height of release parameter during collection；
As a result module is obtained, for the parameter after optimization to be input in Calpuff model, obtains light gas concentration field knot
Fruit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910071708.9A CN109783966B (en) | 2019-01-25 | 2019-01-25 | Method and device for improving simulation of light gas diffusion by Calpuff model |
Applications Claiming Priority (1)
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|---|---|---|---|
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