In　recent　years,　jacket　foundations　have　been　increasingly　employed　in　offshore　wind　farms.　Their　complex　design　comprising　piles　and　trusses　poses　challenges　for　conducting　comprehensive　flow　field　measurements　using　physical　experiments.　Consequently,　the　influence　of　the　flow　field　on　local　scour　around　these　foundations　remains　unclear.　Therefore,　numerical　simulation　methods　are　essential　to　depict　the　surrounding　flow　characteristics.　This　study　utilizes　large　eddy　simulation　(LES)　turbulence　models　within　OpenFOAM　to　simulate　the　flow　field　around　jacket　foundations　on　flat-bed　and　equilibrium　scour　bathymetry.　A　flume　experiment　was　conducted　for　numerical　model　establishment　and　validation.　The　close　agreement　between　experimental　and　numerical　results　indicates　that　the　LES　model　accurately　reflects　the　flow　patterns　around　the　jacket　foundation.　Time-averaged　and　instantaneous　flow　characteristics,　average　kinetic　energy　(AKE),　turbulence　structure,　and　bed　shear　stress　were　analyzed.　The　results　indicate　that　flow　intensity　is　reduced　due　to　the　shielding　effect　and　energy　dissipation　by　the　truss　structure　of　the　jacket　foundation.　Furthermore,　the　AKE　of　the　flow　upstream　of　the　rear　piles　decreases　by　18.9%　in　the　flat-bed　state　and　28.0%　in　the　equilibrium　state,　indicating　more　energy　dissipation　and　less　scour　at　the　rear　piles　in　the　equilibrium　state.　The　research　findings　offer　valuable　insights　into　the　design　and　scour　protection　strategies　for　jacket　foundations.　©　2024　by　the　authors.