Direct　contact　condensation　of　jets　in　fluid　has　been　widely　applied　in　many　industrial　applications　owing　to　the　low　requirement　of　driving　potential　and　high　efficiency　of　heat　and　mass　transfer.　Here,　experiments　are　carried　out　to　investigate　the　velocity　field　characteristics　of　the　turbulent　jet　induced　by　direct　contact　condensation　of　steam　jet　in　crossflow　of　water　in　a　vertical　pipe.　Visual　equipment　is　specially　invented　to　investigate　the　velocity　field　characteristics　by　using　Particle　Image　Velocimetry　(PIV)　measurement　technique.　The　high　intensity　laser　light　reflected　by　the　pure　steam　region　just　outside　the　nozzle-exit　brings　out　severe　damage　to　the　CCD　camera.　To　solve　this　technical　problem,　a　black　plate　is　adopted　to　shield　the　pure　steam　region.　According　to　the　contours　of　the　velocity　fields　and　streamlines,　the　influences　of　jet　momentum　ratio,　jet　Reynolds　number　and　water　temperature　on　the　jet　flow　field　are　explored.　The　jet　centerline　trajectory　equations　in　exponential　form　are　established　based　on　the　local　maximum　mean　velocity.　By　introducing　the　jet　Reynolds　number　and　jet　momentum　ratio,　the　correlation　for　prediction　of　jet　centerline　trajectory　equations　is　proposed,　and　the　predicted　results　are　within　30%　of　the　experimental　data.　The　reciprocal　of　the　local　maximum　mean　velocity　and　the　half　width　of　the　jet　are　proportional　to　the　downstream　coordinate　along　the　jet　velocity　centerline　trajectory.　The　scaled　velocity　field　complies　with　the　self-similarity　principle.　(C)　2016　Elsevier　Ltd.　All　rights　reserved.