Q1 Consider the combination pressure measurement device show

Consider the combination pressure measurement device shown in the figure inserted in a flowing gas stream. P_A and P_n are which pressures? P_A stagnation. P_n static P_A: dynamic; P_n: atmospheric P_A: dynamic; P_n: Static P_A: static; P_n: stagnation P_A: stagnation; P_n: atmospheric

Solution

a)

Pa = Stagnation, Pb = Static

Stagnation pressure is when fluid comes to a standstill. It is higher than static pressure as all the dynamic pressure gets converted.

Stagnation pressure = Static pressure + dynamic pressure

Po = Pstat + 1/2*rho*V^2