In　recent　years，leading-edge　serrations　as　a　passive　method　for　wing　separation　control　have　attracted　significant　attention　in　academia.　This　paper　investigates　the　influence　of　two　leading-edge　tubercles　with　relatively　large-scale　wavelengths　on　the　aerodynamics　of　a　full-span　wing　near　critical　angles　through　numerical　simulations.　Compared　to　the　baseline　wing，the　stalling　process　of　the　two　improved　wing　shapes　with　larger-scale　wavelengths　is　both　slow　and　stable.　By　studying　the　surface　flow　characteristics　through　numerical　simulations，we　found　that　the　wing　with　serrations　having　a　wavelength　of　1.　5　times　the　chord　length　maintained　a　singular　and　regular　flow　pattern　both　before　and　after　stalling，while　the　flow　pattern　of　the　wing　with　a　wavelength　equal　to　the　chord　length　transitioned　from　a　singular，regular　flow　to　a　more　complex　combination　of　multiple　flow　patterns　as　the　angle　increased.　A　mechanism　is　proposed　to　explain　this　transition　in　flow　patterns，and　two　flow　combination　mechanisms　are　presented　to　explain　the　reasons　for　the　different　flow　patterns.　©　2024　Chinese　Society　of　Astronautics.　All　rights　reserved.