Question

Define Stagnation temperature.

(a) The temperature at zero velocity

(b) The temperature at zero pressure

(c) The temperature at zero heat transfer

(d) The temperature at zero volume

This question was addressed to me during an interview.

My question is taken from Basic Equations of Compressible Flow topic in chapter Compressible Flow of Fluid Mechanics

Answer 1

Right answer is (a) The temperature at zero velocity

For explanation: The stagnation point is the point at which the properties of the fluid are obtained at a local flow where the velocity of the fluid is zero isentropically. Thus, the correct choice for stagnation temperature is ‘a’.