A SIMPLIFIED THEORY FOR UNSTEADY AERODYNAMIC FORCES ACTING ON AN AIRFOIL FLYING ABOVE SEA-WAVES

1 .　INTRODUCTIONTheairmotionabovetheseawaveisinun steadystateduetothewavedisturbance .Anun steadywingtheoryisneededwhentheaerodynam icforcesandmomentsactingonawing ,ashiporaseabirdflyingabovetheseasurfaceareexpectedtobeanalyzedorinvestigatednumerically .Amongtheknownunsteadywingtheories ,NewmanJ .N .[1] presentedabasicsolutionforawingoscillat ingharmonicallyinauniformairflow .VonKar manandSearsT .[2 ] studiedtheunsteadyaerody namiccharacteristicsforawingmovingwithcon stantspeedinasinusoidalgust (本文共计6页)......[继续阅读本文]