WK 3 TUTE AnswerSheet
1
Transport Phenomena CHEN 3001 Week 3 tutorial solutions 1a. Boundary layer thickness = 5.5 mm Friction force = 0.1695 N b. Boundary layer thickness = 2.2 mm Friction force = 0.094 N 2. From force balance, ball is moving upwards. C D = 395.2 Re = 0.0607 Liquid viscosity = = 0.371 Pa.s 3a. With extended flaps: v min = 46.8 m/s. Using 20% safety margin, the minimum velocity becomes 56.2 m/s, or 202 km/h. Without extended flaps: v min = 70.9 m/s. Using 20% safety margin, the minimum velocity becomes 85.1 m/s, or 306 km/h. b. F D = 16.9 kN Power = F D x velocity = 2620 kW.
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transport phenomena tutorial
Transcript of WK 3 TUTE AnswerSheet
TransportPhenomenaCHEN3001Week 3 tutorial solutions
1a. Boundary layer thickness = 5.5 mm
Friction force = 0.1695 N
b. Boundary layer thickness = 2.2 mm
Friction force = 0.094 N
2. From force balance, ball is moving upwards.
CD = 395.2
Re = 0.0607
Liquid viscosity = = 0.371 Pa.s
3a. With extended flaps: vmin = 46.8 m/s. Using 20% safety margin, the minimum velocity
becomes 56.2 m/s, or 202 km/h.
Without extended flaps: vmin = 70.9 m/s. Using 20% safety margin, the minimum velocity
becomes 85.1 m/s, or 306 km/h.
b. FD = 16.9 kN
Power = FD x velocity = 2620 kW.
