HWset8-S2012 - ASE320 Homework set 8 Due May 1 2012 1 A disc 15cm in diameter is placed in a wind tunnel at right angles to the incoming

# HWset8-S2012 - ASE320 Homework set 8 Due May 1 2012 1 A...

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ASE320’ Homework’set’ #’ 8’ Due:’ ’ May’ 1,’20 12’ 1.) ’ A’disc’15cm’in’diameter’is’placed’in’a’wind’tunnel’at’right’angles’to’the’incoming’flow’ (perpendicular’to’the’flow).’The’drag’of’the’disk’is’found’to’be’3.2N’when’the’air’velocity’is’ 20m/s’and’the’air’temperature’is’25 o C.’Using’this’information,’ estimate’the’drag’of’a’disk’40cm’ in’diameter’in’a’water’flow’having’a’velocity’of’5m/s’at’a’temperature’of’15 o C.’ 2.) Find’the’terminal’velocity’of’a’parachutist,’assuming’that’the’parachute’can’be’modeled’as’a’ semicircular’cup’of’diameter’ 6m’with’a’drag’coef ficient’of’1.4 .’Use’standard’atmosphere’ properties’of’air’corresponding’to’an’altitude’of’ 3000m.’The’total’mass’of’the’person’and’ parachute’is’ 90kg.’ 3.)

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• Spring '12
• vasd
• #, 6m, 1.2m, 40cm, 15cm, 5m/s

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