sestion 13 A sign 20m long and 2m wide is being pulled in longitudinal direction (1.e...
> points A sign 30m long and 2m wide is being pulled in longitudinal direction de along its length) through air at speed of 48 m/s. Sign has the same drag force as an equivalent flat plate Kinematic viscosity of air is 1.41 x 10-5m2/s, density of air is 1.25 kg/m3 The flow over the sign is? Laminar flow Tripped flow laminar then transitions to turbulent laminar on one side, turbulent on other side
aestion 4 s points Save Aroup A sign 30m long and 2m wide is being pulled in longitudinal direction de longits length through air at speed of 48 ms Sign has the same drag force as an equivalent flat plate. Kinematiscosity of air is 1.41X 10-5 m/s, density of air is 1.25 kg/m3 The flow over the sign is? Laminarflow Tripped flow laminar then transitions to turbulent Laminar on one side, turbulent on other side
Required information Air at 25°C and 1 atm is flowing over a long flat plate with a velocity of 7 m/s. The density and kinematic viscosity of air at 1 atm and 25°C are p= 1.184 kg/m3 and V = 1.562x10-5 m2/s. Calculate the distance from the leading edge of the plate where the flow becomes turbulent. The distance from the leading edge of the plate is m. Required information Air at 25°C and 1 atm is flowing over a...
Air at 25 °C and 1 atm is flowing over a long flat plate with a velocity of 8 m/s. (a) Determine the distance from the leading edge of the plate where the flow becomes turbulent. (b) What will be the boundary layer thickness at the end of the plate? (c) If the plate is a 2m by 2 m square, what will be the friction drag acting on the plate? Schematic Given ssumptions Find v=8m/s xcr ,FD ,δ@x=L L-2m...
b. A very thin wing section is being tested in a low speed wind-tunnel. Assuming that the flow on the surface of the wing produce a laminar boundary layer and the velocity profile is given as follows; Determine the theoretical value of; 8" where Rex is the Reynold number at a distance x from the leading edge of the wing, Rei is the Reynolds number at the trailing edge of the wing and Cr (or Cp) is the average skin...
Consider 2 thin, flat plates (Plate 1 and Plate 2 shown below) with air flowing over them with a speed of 6 m/s. Plate 1 is 10 cm by 20 cm and Plate 2 is 30 cm by 20 cm. What is the ratio of the drag coefficient of Plate 2 to the drag coefficient of Plate 1 (Coz/Cp)? Take the critical Reynolds number for transition from laminar to turbulent flow to be 1,000,000. The kinematic viscosity of air (v...
Exercise 2 Air at 20 °C and 1 atm flows over a flat plate at 50 m/s. The plate is 300 cm long and is maintained at 60C. The width of the plate is 2 m. The critical Rec = 5 x 105 The properties are Conductivity k = 0.0263 W/mK, kinematic viscosity nu = v = 15.89 x 10-6 m²/s, Prandtl number is Pr=0.707 Density rho = p = 1.128 kg/m3 1. Determine the critical length Xc 2. Determine...
Air at T=25°C and pressure P=1 bar flows over a square plate with a velocity V=1 m/s. This plate has a length L= 1 m and it is heated over its entire length; the plate temperature is constant Tp=100°C. The following data are given. For air: dynamic viscosity: mu = 1.9*10–5 kg/(m.s); density: rho = 1.05 kg/m3; conductivity k = 0.03 W/(m K); Specific heat Cp = 1.007 kJ/(kg K); Prandtl number Pr = 0.7 For laminar flow over a...