A gas with a specific weight of 610 Nm3 flows at a rate of 0

A gas with a specific weight of 6.10 N/m3 flows at a rate of 0.350 kg/s through a 300 mm × 400 mm duct. Estimate the average velocity in the duct.

Solution

Given:-

specific weight,c =  6.10 N/m³

dm/dt= 0.350 kg/s

Area, A=300 mm × 400 mm = 12*10⁴ mm²=12*10⁴*10^-6m²=0.12 m²

Average velocity in the duct, V avg=?

V avg= c*A/(dm/dt) = 6.10 N/m³*0.12 m² /  0.350 kg/s= 2.09 m/s

Average velocity in the duct, V avg= 2.09 m/s