汽车消声器的流场和压力损失分析(4)

发布时间:2021-06-06

80

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]

———————————————————————————————————————————一

(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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