To　study　the　impact　of　inclination　angle　and　blowing　ratio　on　vortex　generator　enhancing　film　cooling　effectiveness,　the　thermocouples　were　used　to　measure　the　film　cooling　effectiveness,　the　technology　of　particle　image　velocimetry　(PIV)　was　used　to　capture　the　flow　structure,　and　thus　the　effects　of　critical　parameters　such　as　inclination　angle　and　blowing　ratio　on　enhancing　the　film　cooling　effectiveness　were　investigated.　The　distribution　of　film　cooling　effectiveness　and　the　flow　structure　at　mid-span　of　geometries　with　and　without　vortex　generators　were　measured　at　different　inclination　angles(α=20°,　30°,　40°)　and　blowing　ratios(M=0.5,　1.0,　1.5).　It　is　indicated　that　the　vortex　generator　would　significantly　improve　the　film　cooling　effectiveness　and　the　area-averaged　film　cooling　effectiveness　improves　249%　at　most.　The　film　cooling　effectiveness　of　the　geometry　without　vortex　generator　would　be　decreased　when　the　blow　ratio　and　the　inclination　angle　become　larger.　With　the　inclination　angle　of　20°　and　30°,　the　film　cooling　effectiveness　of　the　geometry　with　vortex　generator　would　increase　as　the　increase　of　blowing　ratio.　However,　the　film　cooling　effectiveness　of　corresponding　geometry　would　be　deteriorated　with　the　inclination　angle　of　40°.　When　M=0.5,　the　film　cooling　effectiveness　of　the　geometry　with　vortex　generator　would　slightly　increase　as　the　increase　of　inclination　angle,　however,　an　opposite　trend　is　shown　when　M=1.5.　The　effect　of　inclination　angle　becomes　negligible　when　M=1.0.　©　2017,　Editorial　Department　of　Journal　of　Propulsion　Technology.　All　right　reserved.