Engineering-Research-Activity2015｜SHINSHU UNIV.

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0.2mmPhotoofopenedundershottypeturbine.Theelectricpowerisusedforlightinginahouse.Waterfalltypeturbine（left）andJettypeturbine(right)Eachelectricpowerisusedforanelectrifiedfenceandasatellitemobilephone.IioLabHydropoweristhehighest-potentialrenewableenergysourceinJapan.However,thereisnoroomleftinJapanfornewconstructionoflargehydroelectricpowerplants.Ontheotherhand,wecanutilizeourEco-friendlyhydraulicturbinesinmanylowheadsites.Theturbinesdonotrequireanycivilengineering.Theseturbinesaresuitableforriversandirrigationcanals,whichhavelittleheadbutmuchflowrateorhighspeedstream.Ourapproachleadstocheaperpowergenerationwithoutenvironmentaldisruptions,comparedwiththatoflarge-scalehydroelectricpowerplants.Ourmissionistoprovideasolutiontosavetheenvironmentthroughresearchofcuttingedge,eco-friendlyturbinetechnology.Wehavedevelopedwaterturbinestomatchvariouswaterflows,andstudiedtoimprovetheperformanceofturbinesinthelab.Weconductexperimentsoutsidethelabtoimprovethedurabilityofeco-friendlyturbinesandtheirpowergenerationabilitybyagridofconnectedmultipleturbines.Thegraduatesareactiveintheenvironmental,mechanical,automotive,energy,material,electronics/electronandgovernmentalfieldsinJapanandabroad.ShouichiroIioAssociate ProfessorFluid engineering, Eco-friendly hydraulic turbine, Flow measurement and control, Jet flow, Pneumatic system, Hydraulics. 『Eco-Friendly Hydraulic Turbine』〜For Low Head Sites In the FutureAfter GraduationEnvironmental Science &TechnologyYoshidaLabOurmainresearchinterestiscomputationalfluiddynamics.Currentresearchprojectsare:directnumericalsimulationsofflowsoveranopencavity,includingstudiesoftheeffectsofcavityaspectratioonself-sustainedoscillationsofseparatedshearlayerandrecirculatingvorticesinthecavity;activecontrolofcavityflow;directnumericalsimulationsofjet–edgesystem;directandlargeeddysimulationsoftwo-dimensionalturbulentjets.TheNavier-Stokesequations,thatarethemomentumequationsofflow,arenonliniear.Thussolvingtheseequationsisverydifficult.NumericalsolutionsoftheNavier-Stokesequationsforcomplexflowscanbeobtainedfromnumericalsimulationsusingsupercomputers.Wecaninvestigatethemechanismofcomplexflowusingadvancedsupercomputers.Takashi YoshidaAssociateProfessorPhD Engineering 1995, Nagoya University.Faculty: Nagoya University, 1994-1997.Faculty: Shinshu University, 1997-Isosurfaces of vorticity in flow over cavity. The left figure shows an uncontrolled flow and the right figure shows a controlled flow. Numerical simulations of flows using a supercomputerIsosurfaces of vorticity ina two-dimensional turbulent jet.Numericalsimulationhasbeenausefultoolforengineeringdesignandanalysis.Alumnusfromourlaboratoryareworkingasmechanicalengineers,mechanicaldesigners,softwaredesigners,systemengineers,etc.In the FutureAfter GraduationEnvironmental Science &Technology63

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