Mass Flow Through a Nozzle
Mass Flow Through a Nozzle
The mass flow through any section is the product of density, area and velocity — continuity in its most direct form.
The mass flow is ṁ = ρ·A·v. where ρ is the density, A the area and v the velocity.
Inputs
rho := 1.2 kg/m^3=1.2 kg/m^3
A := 0.005 m^2=5e-03 m^2
v := 120 m/s=120 m/s
Multiply density, area and velocity.
m_dot := rho·A·v=0.72 kg/s
Results
For incompressible flow the mass flow is constant along the nozzle, so as the area shrinks the velocity rises to match.
Assumptions & limitations
- One-dimensional flow.
- Uniform properties at the section.
- Density at the exit condition.