汽车消声器的流场和压力损失分析(4)
发布时间:2021-06-06
发布时间:2021-06-06
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一一———————————————————————————————————————一
Treatmentoflandfillleachatebysupercriticalwateroxidation
Li
武汉科技大学学报
2011年第1期
Guixian,WangTianfeng,ZhangCaixia
ofTechnology,Lanzhou730050'China)
(C011egeofPetrochemicalTechnology。LanzhouUniversity
ofloweffect Asimplerand
Abstmct:Thetraditionaltreatmentoflandfillleachateiscomplicatedand
leachateoxidationdegrada—
moreeffectivemethodofsupereriticalwateroxidationisusedforlandfill
tlmeand
tioninXi’aninanexperimentalstudy.Fourfactors,namely,pressure'temperature’hold
oxygen
excess
rate,
are
investigated.Theresultshowsthattheincreaseofpressure,temperature’
canat
holdtimeandoxygen
excessrate
Undertheconditionsofpressure
excess
at
H3一N)strikingly
promotetheremovalofammonianitrogen(N
at420℃,holdtimeat10minandoxYgen26
MPa,temperature
up
to
2.0,theremoval
rate
ofCODc,is
98.43%
andthatofammonianitrogenuP
to
96.61‰
gen;removal
rate
..
demand;atomonlamtro-
Keywords:1andrillleachate;supercritiealwateroxidation;chemicaloxygen
[责任编辑
尚晶]
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(上接第71页)
[5]谷芳,刘伯潭。李洪亮,等.基于CFD数值模拟的汽
车排气系统结构分析[J].内燃机学报,2007,25(4):
358—362.
构优化设计中的应用[J] 汽车工程,2000,22(2):
129—133.
[7]卞明,王志成,高宏阁.1P68F消声器分析[J] 小型
内燃机与摩托车,2009,38(3):68-69.
[63帅石金,王建昕,庄人隽.CFD在车用催化转化器结
lossofautomotivemufflers
Analysisofflowfieldandpressure
XMJianmin
(DeDartmentof
MechanicalEngineering,XiamenUniversityofTechnology,Xiamen361024’China)
ofthevelocityfieldand
Abstract:Inthispaper,three-dimensionatsteadyflownumericalsimulation
ofdoublecavityexpansionmufflerwasperformedbyusmgthe
pressurefieldoftwodifferentforms
howthepressurelosschanges
CFD(computationalfluiddynamicmethod)softwareFLUENT,and
theinternalflowfieldof
withthevelocityoftheentrywasstudied.Simulationresultsshowthat
ofconneetmgPIPehasgreat
doublecavityexpansionmufflerisverycomplex;thepositionandnumbereffect
on
ofthedualconnecting
thepressure10ssofthemuffler;theresistanceloss
pipe
1s
greater
thanthatofthesingleconnectionpipe.
field
Keywords:CFD;mufliers;velocityfield;pressure
[责任编辑郑淑芳]
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