摘要
Anareaofprotrudingfeathersfoundaroundthebeakofmanypenguinspeciesisthoughttoinduceaturbulentboundarylayerwhilstswimming.HydrodynamictestsonamodelHumboldtpenguin,Spheniscushumboldti,suggestthatinducedturbulencecausesasignificantreductioninboundarylayerheight,flowseparation,andanaverageof31%reductionindrag(1.0m/sto4.5m/s).Visualisationofsurfaceflowshowedittofollowthebodyprofile,overthefeetandtail,beforeseparating.Movementofthefeetinswimmingpenguinscorrelateswithsteeringofthebird.Inducedturbulencemaythereforefurtherincreaseswimmingefficiencybyreducingtheamountoffootmovementrequiredtodirecttheswimmingbird.
出版日期
2005年02月12日（中国期刊网平台首次上网日期，不代表论文的发表时间）
