In a boundary layer flow along with the nozzle, why is the layer clos – McqOptions

MCQOPTIONS

1.	In a boundary layer flow along with the nozzle, why is the layer closest to the wall cooler?
A.	Flow velocity is minimum; Low energy flow leads to less temperature
B.	Heat transfer to the walls
C.	Radial heat propagation from the nozzle axis is a very slow process
D.	Mass flow rate closer to the nozzle axis is maximum
Answer» C. Radial heat propagation from the nozzle axis is a very slow process

Discussion

No Comment Found

Related MCQs

Find the actual mass flow rate for a discharge correction factor (ζd) of 1.15. For an ideal nozzle of same design and initial state, the following information is given: Volume flow rate (Q) = 0.53 m3/s; static temperature (T) = 590 K; static pressure (P) = 0.15 MPa; R = 287 J/kg/K.
Determine the velocity correction factor (ζv) if the energy conversion efficiency is 0.94.
Which of the following terms denote the ratio of kinetic energy per unit flow of the actual jet leaving the nozzle to that of a hypothetical ideal one with the same working substance, initial state and exit pressure as that of the actual exhaust jet?
Which of the following is not correct for transient periods when compared to steady periods of rocket operation?
How do the characteristic velocity (c) and the specific impulse (Isp) vary as particle fraction β is increased?
Which of the following is the correct expression for particle fraction β? Given: Total mass = mT, mass of the particles = mp.
What happens to the solid particles in multiphase flow at the nozzle exit when the size of the particles increases?
In which of the following cases is the effect of the boundary layer more pronounced?
In a boundary layer flow along with the nozzle, why is the layer closest to the wall cooler?
For an asymmetric nozzle section of diameter 12 cm, determine the average value of flow velocity if the velocity distribution is of the form v2 = (2r – 3r2) x 104 m/s, where r denotes the radial location in the cross-section plane.