With　the　arrangements　of　vortex　generators　(VG)　and　ramp,　film　cooling　effects　on　endwall　near　leading　edge　were　numerically　investigated　at　two　blowing　ratios　(i.e.　M=0.5　and　M=1).　To　determine　suitable　numerical　methods,　mesh　independency　analysis　and　turbulence　model　selection　were　carried　out　based　on　the　existing　experimental　data　and　LES　results.　With　the　numerical　methods,　flow　fields　near　the　leading　edge　were　visualized　to　illustrate　the　influence　of　VG　and　ramp　on　coolant　coverage　on　blade　endwall.　Film　cooling　effectiveness　distributions　on　endwall　and　coolant　trajectories　near　leading　edge　were　compared　among　five　different　configurations　with　VG　and　ramp.　The　results　show　that　the　attachment　of　coolant　on　blade　endwall　is　improved　with　the　implement　of　VG　between　shaped-hole　and　leading　edge.　With　the　implementation　of　ramp　on　endwall　between　cooling　hole　and　leading　edge,　the　coolant　spreads　wider　on　endwall　along　pitchwise　direction　than　the　baseline　case.　With　the　implementation　of　VG　and　ramp,　film　cooling　effect　on　endwall　near　leading　edge　is　significantly　improved　as　compared　with　the　only　ramp　and　only　VG　cases.　Compared　with　the　baseline　case,　pitchwise-averaged　film　cooling　effectiveness　on　blade　endwall　near　leading　edge　is　increased　by　about　9%,　and　the　film　cooling　effectiveness　distributions　on　endwall　along　pitchwise　direction　become　much　uniform,　for　the　case　with　both　ramp　and　VG　at　M=1.　©　2021　American　Society　of　Mechanical　Engineers　(ASME).　All　rights　reserved.