简介:2018年3月23日至24日,深圳警翼智能科技股份有限公司(以下简称“警翼”)主办的“翼起正能量”合作伙伴大会在深圳蛇口举行,近千名代表参会。会前,参会代表参观了警翼总部与创新中心的实验室和产品展厅,通过零距离接触,多角度了解警翼的发展历程。会上,警翼董事长荣勤发表了“翼起正能量”的主题演讲,与现场来宾表达了对社会、时代、机遇的感恩。警翼常务副总经理崔乘刚分享了产品正能量,并发布了一系列新品,产品阵容强大,分别有记录仪F2、F3、F4、G2、X1、X2、W7工作站、快充底座,功能优化了包括语音对讲、HDR、视频减震器、智能可穿戴,超高清摄录,快速充电、快速采集等产品。警翼相关技术人员还与现场来宾一起分享了“销售正能量暨2018年营销规划”合作政策,寻求与合作伙伴的最大化利益共享。同时,警翼还和行业相关专家展开圆桌讨论,透彻剖析行业发展潜力与需求,特邀了两位经验丰富的嘉宾从新行业与多渠道协作两方面分享其在行业探索的经验。大会现场,警翼还举行了意义特殊的颁奖典礼,感谢过去一年里优秀合作伙伴们的携手共进,积极向上,攻坚克难,全力以赴。
简介:Fishareabletomakegooduseofvortices.Inacomplexflowfield,manyfishcontinuetomaintainbothefficientcruisingandmaneuverability.Traditionalman-madepropulsionsystemsperformpoorlyincomplexflowfields.Withfish-likepropulsionsystems,itisimportanttopaymoreattentiontocomplexflowfields.Inthispaper,theinfluenceofvorticesonthehydrodynamicperformanceof2-Dflapping-foilswasinvestigated.Theflapping-foilheavedandpitchedundertheinfluenceofinflowvorticesgeneratedbyanoscillatingD-sectioncylinder.Anumericalsimulationwasrunbasedthefinitevolumemethod,usingthecomputationalfluiddynamics(CFD)softwareFLUENTwithReynolds-averagedNavier-Stokes(RANS)equationsapplied.Inaddition,dynamicmeshtechnologyandpostprocessingsystemswerealsofullyused.Thecalculationsshowedfourmodesofinteraction.Thehydrodynamicperformanceofflapping-foilswasanalyzedandtheresultscomparedwithexperimentaldata.Thisvalidatedthenumericalsimulation,confirmingthatflapping-foilscanincreaseefficiencybyabsorbingenergyfrominflowvortices.
简介:Inordertostudycavitationcharacteristicsofa2-Dhydrofoil,themethodthatcombinesnonlinearcavitationmodelandmixed-iterationisusedtopredictandanalyzethecavitationperformanceofhydrofoils.ThecavitationelementsarenonlinearlydisposedbasedontheGreenformulaandperturbationpotentialpanelmethod.Atthesametime,themethodthatcombinescavityshapeforfixedcavitylength(CSCL)iterationandcavityshapeforfixedcavitationnumber(CSCN)iterationisusedtoworkoutthethicknessandlengthofhydrofoilcavitations.Throughanalysisofcalculationresults,itcanbeconcludedthatthejumpofpressureandvelocitypotentiallyexistbetweencavitationendareaandnon-cavitationsareaonsuctionsurfacewhencavitationoccursonhydrofoil.Incertainanglesofattack,thecavitationnumberhasanegativeimpactonthelengthofcavitations.Andunderthesameangleofattackandcavitationnumber,thebiggerthethicknessofthehydrofoil,theshorterthecavitationslength.
简介:针对冬季冰雪天气CRH380B型高寒动车组制动盘易发生划伤的实际情况,对制动盘异常划伤原因进行研究,优化闸片结构,设计出适用于冬季的大间隙粉末冶金闸片。干燥及冰雪工况的1∶1制动动力试验结果显示,新研制闸片瞬时摩擦系数平稳、平均摩擦系数符合既有车辆要求,与其对偶的制动盘摩擦面状态良好;装有大间隙粉末冶金闸片的整车紧急制动试验结果显示,制动初速度200km/h纯空气紧急制动距离为1525m,小于2000m评价指标要求,制动初速度300km/h纯空气紧急制动距离为3711m,小于3800m评价指标要求;正线载客运营结果表明,大间隙粉末冶金闸片对改善高寒地区冬季动车组运营中出现的制动盘异常划伤问题有较好的效果。