A plane submerged turbulent water jet discharged parallel to the offset bottom wall in a channel with a finite water depth was investigated experimentally. Depending on the depth of the nozzle and its height from the bottom, the jet deflects towards either of two boundaries, the free surface or the solid wall. Detailed data on the velocity field measured by the Particle Image Velocimetry (PIV) method are obtained to examine the effect of the opposite boundary on the deflecting jet and the difference in the jet development between the deflection to the free boundary and that to the solid boundary. The mean velocity profiles and the spread rates of the jet are compared with those of a conventional plane free jet by applying a curved coordinate system along the jet centerline.

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iDepartmenC of Rcscarchlnterdisciplinnor}' Graduate SctK)()l oE' Medieinc Eif)d Engineering, UnlrJetsity of Yamanashi 4-3-] 1 1}ikedtt, Kofu 4or}-8511, Japan. tsunoda@ya[llanaShi.acjP *]Canon inc,, 10-2, Shimomflxukt.) 3-chome. OhL:i-ku,Tol"'o l46-S501, japan *]DepartmenLol'EducationhiterdiscipliiiaryG!'aduateSehoolofMedici]ea]dEngineering,UniversityofYamanushi ABSTRACT P]ane guhrnen/ged turbulcmt water jet discharged parullel to the offset bottom waL! in Lhe channcl with a finite water depth-,as investigated cxperitnenta]ly Depending o" inc depth of the nezzlc and its height fi'(Mn the bottom, the jet defiects towards either of the two beLmdaries, that is, tlie fu)c surface oi' the salid wall.[)etailed data on the velocity ficld measured b}, using the PIV method are giveti in Qrder to examine the inflLtence of aie opposing boundary upon the defiecting jet and the diffitrcnoc of thejet develepinent between the deflection to thc free bounda]'y and that to the selid boundar}: Tlic mean velocity profi]es imd the spread rates of thc jet are eompared with thc.}se of a crmventicmal pkumc free jet applying a curved co[Tdinate s},stein along thcjct centerlitie, sft.te Lt･/1 . Fi.o. 1 Expcrimcntal apparatus and PIV setup.