学科分类
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5 个结果
  • 简介:Thispaperpresentsanexperimentalstudyresultofflowfieldofadual-channelburner.Inordertosolvetheubiquitousproblemofbadrigidityofjetsindual-channelburners,wedgeswithdifferentarrangementsandstructuralparameterswereaddedtodifferentpositionsattheoutletoftheburners.LaserParticleImageVelocimetry(PIV)wasusedinthisstudytomeasuretheflowfieldtoinvestigateinfluenceofthewedgesonflowfieldofthedual-channelburner.Experimentalstudyshowsthatfixingwedgesatbothrightandleftsidesoftheburner'soutletcanincreasetheintensityofrecirculationwithoutchangingthesizeoftherecirculationzoneandenhancetherigidityofjetsviaincreasingspeedofthetwoprimaryairjetsattheoutlet.

  • 标签: 燃烧器 双通道 PIV 楔形层 流场
  • 简介:上演注射者展出了大潜力完成低排出物并且正在成为许多民用的飞机的更好的选择。而且,它正在答应在军事引擎采用这个注射者图案,它要求大多数空气进入的燃烧通过到还原剂烟排放的注射者的燃烧室。然而,瘦上演注射者在低负担操作对燃烧不稳定性和扑灭敏感,因此为拓宽它的稳定的操作范围的技术为它在真实引擎的申请是关键的。

  • 标签: 点火燃烧器 性能评估 喷油器 贫油熄火 引燃 LBO
  • 简介:AkindofZrO2ceramicmaterialforporousmediaburnerwaspreparedbypolymericspongeprocesswithstartingmaterialsofzircon,zirconiapowder,microsilica,andballclay,andbinderofsilicasolthroughreaction-sintering.Theeffectsofmicrosilicaadditiononcoldcrushingstrengthandzirconia/zirconaddingratioonthermalshockresistancewerestudied.Theresultsshowthattheporousmediamaterialhasproperporosity,highstrength,andexcellentthermalshockresistancewhenzirconiaadditionis85%andzirconadditionis5%.Theperformanceindexesare:porosity82%,coldcrushingstrength3.1MPa,thermalshockresistancemorethan10cycles,andgoodthermalshockresistanceto1500℃flame.

  • 标签: 氧化锆陶瓷材料 多孔介质 性能指标 燃烧器 抗热震性 起始原料
  • 简介:Inordertoinvestigatethefiresuppressioneffectivenessofwatermistwithmetalchlorideadditives,ultrafinewatermistsofthesesaltswithdiametersabout10μmwereintroducedintoCH4/airnon-premixedflameinthecupburner.Resultsshowedthatthesedropletshardtomakeitselftotheflamefrontunderthecupburnerflowconditionsfunctionedasacarrierofthevaporizedsolidparticlesoritsdecomposedmaterials.Themetalchlorideimprovedfiresuppressionefficacyofwatermistwhichwereaffectedbythetypeandconcentrationofmetalchloride.Onamassbasis,thereisafiresuppressioneffectivenessrelationshipofMgCl2

  • 标签: additive water MIST FIRE suppression CH4