防風(fēng)網(wǎng)尾流區(qū)內(nèi)風(fēng)速度和湍流度實(shí)驗(yàn)研究.pdf

1、天津大學(xué)碩士學(xué)位論文防風(fēng)網(wǎng)尾流區(qū)內(nèi)風(fēng)速度和湍流度實(shí)驗(yàn)研究姓名：耿宇申請學(xué)位級別：碩士專業(yè)：化工過程機(jī)械指導(dǎo)教師：宗潤寬2002.1.1____●●__。___。。_。?！痏”—’—m’—‘“———“_—‘—^_——w—_—?！猒—^_—_—“——————————————————————————————～。AbstractWindIfencecanbeusedtoeliminateairpollutioncausedbywindblow

2、ndustWindfencewakeflowaffectsthecapabilityofwindreductiongreatlyMostreportsfocusedonthewakeflowjustwithafrontwindfence(singlewindfence)Sortsofwaysofsexingwindfenceareusedinellgl‘neeringsaccordingtothedifferencestatusunde

3、rthestrictdemandsofenvironment。Severalwaysofsettingwindfenceandseveralformsofholesinwindfencesare：usedinthisexperimentalstudyinordertomeasurethewi聰velocityandturbulence。Theexperimentresultshaveshownthat：WindfenceCallredu

4、cewindvelocityandturbulenceofapproachfloweffective甄Theturbulencedecreaseswiththeincreasingofheightz，andalsodecreasesatbackwardpositionWindfenceCallshelterabout15HlengthatdownwindInthedirectionofheight，shelterrangeCanbema

5、rkedoffasthreearea：(1)SteadywindreductionareaZ耀≤l、thewindreductiortcoefficientisgreatandsteady；(2)Subdued誦艇reductionareaIy5，windreductioneffectdisappearsgradually；thewindreductioneffectbecomesmoreandmorebadlywiththelncre

6、aseofdistance。AformulacalculatingwindreductionratioofwindfenceCwisbuiltItcanevaluatetheperformanceofailkindofwindfencessyntheticallyandprovidereferenceforengineeringtocompareandchoicewindfenceKeyWords：WindfenceWakeflowVe