Due　to　its　merit　of　no　consuming　energy,　no　moving　part,　and　less　requiring　space,　and　maintenance,　the　ejector　is　one　of　the　most　promising　hydrogen　recirculation　devices　for　proton　exchange　membrane　fuel　cell　(PEMFC)　applications.　However,　the　prominent　problem　is　its　poor　adaptability　of　the　conventional　ejector　to　meet　the　power　range　requirements　of　the　PEMFC　system.　Thus,　a　multi-nozzle　ejector　was　investigated　to　widen　the　applicable　power　range　of　a　PEMFC　system.　The　designed　multi-nozzle　ejector　consists　of　one　central　nozzle　(CN)　and　two　symmetrical　nozzles　(SNs).　The　CN　mode　is　activated　under　low　power　conditions,　while　the　SNs　mode　is　switched　to　adapt　high　power　conditions.　A　3D　computational　fluid　dynamics　(CFD)　model　was　established　to　simulate　the　performance　of　ejectors,　and　an　experimental　test　bench　was　built　to　validate　the　accuracy　of　the　CFD　model.　The　results　indicated　that　the　mixing　chamber　diameter　(Dm)　and　throat　tilt　angle　of　SNs　(αt)　have　a　significant　effect　on　the　entrainment　performance.　It　was　found　that　the　multi-nozzle　ejector　can　broaden　the　hydrogen　supply　range　from　0.27　to　1.6　g/s　(22-100　kW)　with　the　optimal　combination　of　a　Dm　of　5.0　mm　and　αt　of　8°.　Nevertheless,　the　hydrogen　supply　range　is　0.48　to　1.6　g/s　(37-100　kW)　when　using　a　conventional　single-nozzle　ejector　with　a　Dm　of　5.0　mm.　Moreover,　the　temperature,　pressure,　and　relative　humidity　of　the　secondary　flow　have　a　great　influence　on　the　hydrogen　entrainment　ratio　with　the　change　of　stack　power.　©　2020　John　Wiley　&　Sons　Ltd