海底管线溢油在水体中的输移扩散数值模拟研究
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溢汕抵达海Ilj的叫怕J和半径均随之增大。各层的打散面积同样受到周围耳境流场
海底管线☆∞dm体中的辅诂女微m值模拟qfR
结构和初始溢油角度的综合影I响,而溢油角度的影响释度同时义受到潮流场分布 的制约。而在密度分层环境流体中,浮射流到达一定深度后,随流向F游扩散, 小会在较短时问内抵达海表面,因此在gE离溢油口较远的地点即使海面没有出现
to can on
marine water quality
provide method and basis for
even
surface in
a
relatively short
ifthere is
no
o“obsen,ed in the
surface衙from the
sea
oil spill location,the contamination ofoil may still exist in the deep
By the study ofthe transport and dispersion model ofthe submarine pipeline oil spill.a clearer understanding of the affect extent of spill oil and ecological environmellt will be showed,v,hieh the evaluation ofthe oil spill harm
Therefore,to studythetransport and diffusion of submarinepipeline oil spill becomes increasingly important and urgent A briefoven,iew ofthe research background is made in this paper,and then the research status of the oil spill and floating Jct home mad abroad is reviewed.The
the background flow field input of
the submarine pipeline oil spill model
2 olI A submarine pipeline oil spill model simulating the transport and diffusion of is developed by Lagrangian nd the model is
a
resources
variety of damage
when they
are
Therefore with the development ofsubmarine pipelines,the w]lat
s
probability of oil spill will increase
cause
more,the oil spilled in deep
buoyantjet
verified by the experimental data gi、an in the literature for four difl-erent ambient
status
including
unstratified
stagnant
ambient,stratified
stagnant
the oil spill in
density
stratified ambient,the buoyant
jet
terminal level,and then diffuse with
sea
the anthient flow downstream without arriving at the period oftime Therefore
occttrs
in vertical direction overflow,while the maxilrmm distance in horizontal
downstream direction the time
What’s
l/lore,with the decrease of the initial oil spill angle.
diffusion results ofthe oil spill
4
ale
be modeled in stratified density ambient
The study results of the submarine pipeline oil spill show that:The main
factor impacting the results of the oil spill model is the ambient flow distribution And rcgardless of the oil spill time the minimum distance of the 0f[:set in horizon
Accompanied by the rapid dex relopment of offshore oil exploitation,submarine pipelines gas
are
usedmortl|widely asthemainineans oftransportingthe offshore oil and And submarine pipelines will inevitably appear in service
越重要。
本文刘研究背景等作了简要概述,井综述了溢油利浮射流的国内外研究现状 研究的具体内容和结论如下: l应用Backhaus的三维非线性数值模型模拟了南海北部海域的三维潮流场 并应用三个测站的实测资料对模型进行了验证,将计算得到的=维潮流场作为海
底管线溢油模型的背景流场输入。
2采用拉格朗R控制体方法,建立了海底管线溢油输移扩散的浮射流模型. 并应用文献中给i』j的实验数据,在周围环境流体的性质分别为不分层静止、不分 层流动、分层静止和分层流动时,对模型模拟的轨迹巾心线等结采进行了验证。 3将海底管线溢汕模型应用到南海北部的陆牛7—2油IH附近海底管线溢油 的预测【ji,模拟了溢油在密度不分层和密度分层环境流体-1・的三维输移扩散,模 拟过程中考虑了几种不同的溢油情况,主要对不分层环境流体中初始溢油角度对 模拟结果的影响以及不同流场环境中的溢油扩散规律进行了分析,并进一步研究
the model is
field ofthe northern South China Sea And data of three stations
as
validated
by the
measured
The calculated
three dimensional tidal current field is using
in tbe nonhern part of the South Chfaa Sea
The three-dimensional transport and
diffusion of oil spill is simulated in the density unstratified and stratified ambient
respectively During the simulation several different situations of the spill oil
considered
are
The impact to the simulation result ofdifferent original spill angles and
After the oil spills from subsca pipelines,it will directly affect the water quality,and endanger the marine life.damage the ecology of the
sea
during its rising process
sea
and the radius of spill oil reaching the
area
st】rfaee will
increase 1he
diffusion
of each layers is also
subject
to the combined effects of the ambient
sanle
specific
I
coi',tents andconclu¥ioIls
ofthe
reseⅢch㈣follows:
Using Backhaus’three—dimensional
current
nonlinear numerical model,this paper
sinmlate fierce-dimensional tidal
sea
sea
will
much larger pollution ofwater body than that occurred in the
OB
surface.which
will result in serious impact and harm
marthe life and the surrounding coastal cities
flow field and the initial oil spill angle,and the impact of spill angle at the is affected by the tidal current field distribution will reach
a
time
When
surrounding anabient status is he analyzed And the centerlfae ofthe spill oil and the
area
of each
horizontal profile
are
be simulated,too
Finally,the transport and
了溢油轨进的中心线萃¨各水平制吐【i的输移扩散情况,最后比较了密度分层与古对 溢油输移扩散的影响。
4海底管线溢油的研究结果表明:浮射流的各项结果产生较大区别的主要 静响田紊是潮流分布结构的不同,而无论是哪个时刻发生溢油,部足垂直向l溢 fl{时的水平偏移距离最小.顺流水平溢出时最人,且随着初始溢汕角度的减小,
雌底管纯溢油在水*中的输移扩散数值榄拟WfE
海底管线溢油在水体中的输移扩散数值模拟研究 摘要
伴随海洋石油丌采的快速发展,输运海洋油气资源的主要方式——海底管线
的铺设范围也越来越大,而在海底营线月日役的过程-h不可避免地会产生各种损 伤,随着海底管线的不断增多,管线溢油的发,上概率吐l不断增加。而发生在深海 海底管线的溢油事故,造成的海洋环境水体污染耍远,(于发生在海面的谥油,会 对海洋生物以及周围沿海城市产生严重的影响和危害。海底管线发生溢油后,溢 油在上升过程中会直接影响海水水质,危害周围水体巾的海洋生物,对海水水体 的生态造成破坏。因此。研究海底管线溢油在水体中的输移扩散削题就变得越来
ambient,
unstratified flowing ambient,stratified flowing ambient
3 The model is applied in the oil spill from pipelines nem kufeng 7-2 oil field
m底*垃溢油0:水体中№输移*散数口模拟w}究
溢油,深层海域仍有司能出现溢油污染。
通过对海底管线溢油的输移扩散模拟研究,可以更清楚的了解溢油对海水水 质和生态环境的影响范围和程度,从而为评价溢油对海洋生态坏境的危害程度提
供数据和依据。
关键词:海底管线:溢油:浮射流;数值模拟
海底昝战溢油0:水体中的输移扩敞数值氍拟Ⅳf宄
Numerical Simulation ofthe Spread.Diffusion Process ofOil Spilled from Submarine Pipeline Abstract
海底管线☆∞dm体中的辅诂女微m值模拟qfR
结构和初始溢油角度的综合影I响,而溢油角度的影响释度同时义受到潮流场分布 的制约。而在密度分层环境流体中,浮射流到达一定深度后,随流向F游扩散, 小会在较短时问内抵达海表面,因此在gE离溢油口较远的地点即使海面没有出现
to can on
marine water quality
provide method and basis for
even
surface in
a
relatively short
ifthere is
no
o“obsen,ed in the
surface衙from the
sea
oil spill location,the contamination ofoil may still exist in the deep
By the study ofthe transport and dispersion model ofthe submarine pipeline oil spill.a clearer understanding of the affect extent of spill oil and ecological environmellt will be showed,v,hieh the evaluation ofthe oil spill harm
Therefore,to studythetransport and diffusion of submarinepipeline oil spill becomes increasingly important and urgent A briefoven,iew ofthe research background is made in this paper,and then the research status of the oil spill and floating Jct home mad abroad is reviewed.The
the background flow field input of
the submarine pipeline oil spill model
2 olI A submarine pipeline oil spill model simulating the transport and diffusion of is developed by Lagrangian nd the model is
a
resources
variety of damage
when they
are
Therefore with the development ofsubmarine pipelines,the w]lat
s
probability of oil spill will increase
cause
more,the oil spilled in deep
buoyantjet
verified by the experimental data gi、an in the literature for four difl-erent ambient
status
including
unstratified
stagnant
ambient,stratified
stagnant
the oil spill in
density
stratified ambient,the buoyant
jet
terminal level,and then diffuse with
sea
the anthient flow downstream without arriving at the period oftime Therefore
occttrs
in vertical direction overflow,while the maxilrmm distance in horizontal
downstream direction the time
What’s
l/lore,with the decrease of the initial oil spill angle.
diffusion results ofthe oil spill
4
ale
be modeled in stratified density ambient
The study results of the submarine pipeline oil spill show that:The main
factor impacting the results of the oil spill model is the ambient flow distribution And rcgardless of the oil spill time the minimum distance of the 0f[:set in horizon
Accompanied by the rapid dex relopment of offshore oil exploitation,submarine pipelines gas
are
usedmortl|widely asthemainineans oftransportingthe offshore oil and And submarine pipelines will inevitably appear in service
越重要。
本文刘研究背景等作了简要概述,井综述了溢油利浮射流的国内外研究现状 研究的具体内容和结论如下: l应用Backhaus的三维非线性数值模型模拟了南海北部海域的三维潮流场 并应用三个测站的实测资料对模型进行了验证,将计算得到的=维潮流场作为海
底管线溢油模型的背景流场输入。
2采用拉格朗R控制体方法,建立了海底管线溢油输移扩散的浮射流模型. 并应用文献中给i』j的实验数据,在周围环境流体的性质分别为不分层静止、不分 层流动、分层静止和分层流动时,对模型模拟的轨迹巾心线等结采进行了验证。 3将海底管线溢汕模型应用到南海北部的陆牛7—2油IH附近海底管线溢油 的预测【ji,模拟了溢油在密度不分层和密度分层环境流体-1・的三维输移扩散,模 拟过程中考虑了几种不同的溢油情况,主要对不分层环境流体中初始溢油角度对 模拟结果的影响以及不同流场环境中的溢油扩散规律进行了分析,并进一步研究
the model is
field ofthe northern South China Sea And data of three stations
as
validated
by the
measured
The calculated
three dimensional tidal current field is using
in tbe nonhern part of the South Chfaa Sea
The three-dimensional transport and
diffusion of oil spill is simulated in the density unstratified and stratified ambient
respectively During the simulation several different situations of the spill oil
considered
are
The impact to the simulation result ofdifferent original spill angles and
After the oil spills from subsca pipelines,it will directly affect the water quality,and endanger the marine life.damage the ecology of the
sea
during its rising process
sea
and the radius of spill oil reaching the
area
st】rfaee will
increase 1he
diffusion
of each layers is also
subject
to the combined effects of the ambient
sanle
specific
I
coi',tents andconclu¥ioIls
ofthe
reseⅢch㈣follows:
Using Backhaus’three—dimensional
current
nonlinear numerical model,this paper
sinmlate fierce-dimensional tidal
sea
sea
will
much larger pollution ofwater body than that occurred in the
OB
surface.which
will result in serious impact and harm
marthe life and the surrounding coastal cities
flow field and the initial oil spill angle,and the impact of spill angle at the is affected by the tidal current field distribution will reach
a
time
When
surrounding anabient status is he analyzed And the centerlfae ofthe spill oil and the
area
of each
horizontal profile
are
be simulated,too
Finally,the transport and
了溢油轨进的中心线萃¨各水平制吐【i的输移扩散情况,最后比较了密度分层与古对 溢油输移扩散的影响。
4海底管线溢油的研究结果表明:浮射流的各项结果产生较大区别的主要 静响田紊是潮流分布结构的不同,而无论是哪个时刻发生溢油,部足垂直向l溢 fl{时的水平偏移距离最小.顺流水平溢出时最人,且随着初始溢汕角度的减小,
雌底管纯溢油在水*中的输移扩散数值榄拟WfE
海底管线溢油在水体中的输移扩散数值模拟研究 摘要
伴随海洋石油丌采的快速发展,输运海洋油气资源的主要方式——海底管线
的铺设范围也越来越大,而在海底营线月日役的过程-h不可避免地会产生各种损 伤,随着海底管线的不断增多,管线溢油的发,上概率吐l不断增加。而发生在深海 海底管线的溢油事故,造成的海洋环境水体污染耍远,(于发生在海面的谥油,会 对海洋生物以及周围沿海城市产生严重的影响和危害。海底管线发生溢油后,溢 油在上升过程中会直接影响海水水质,危害周围水体巾的海洋生物,对海水水体 的生态造成破坏。因此。研究海底管线溢油在水体中的输移扩散削题就变得越来
ambient,
unstratified flowing ambient,stratified flowing ambient
3 The model is applied in the oil spill from pipelines nem kufeng 7-2 oil field
m底*垃溢油0:水体中№输移*散数口模拟w}究
溢油,深层海域仍有司能出现溢油污染。
通过对海底管线溢油的输移扩散模拟研究,可以更清楚的了解溢油对海水水 质和生态环境的影响范围和程度,从而为评价溢油对海洋生态坏境的危害程度提
供数据和依据。
关键词:海底管线:溢油:浮射流;数值模拟
海底昝战溢油0:水体中的输移扩敞数值氍拟Ⅳf宄
Numerical Simulation ofthe Spread.Diffusion Process ofOil Spilled from Submarine Pipeline Abstract