In a gas turbine, air (kinematic viscosity of 1x104-5 m 2/s) flows over a 2 cm long turbine blade at 100 m/s. how long should the blade be in my lab's wind tunnel (air, kinematic viscosity of 1.5x10a-5 ma2/s, velocity of 10 m/s), to match the reynolds number of the gas turbine? a)-2cm b)-30cm c)-0.3cm

30 cm

Explanation:

For  Reynold's number similarity between model and prototype we should  have

Given L(prototype)= 2cm

V(prototype) = 100m/s

V(model) = 10m/s

 Thus applying values in the above equation we get

Solving for Lmodel we get Lm = 30cm

the equation above shows how temperature f, measured in degrees fahrenheit, relates to a temperature c, measured in degrees celsius. based on the equation, which of the following must be true?

a temperature increase of 1 degree fahrenheit is equivalent to a temperature increase of

5

9

degree celsius.

a temperature increase of 1 degree celsius is equivalent to a temperature increase of 1.8 degrees fahrenheit.

a temperature increase of

5

9

degree fahrenheit is equivalent to a temperature increase of 1 degree celsius.

a) i only

b) ii only

c) iii only

d) i and ii only