In aircraft design, a “differential pressure tester” typically measures the difference in pressure between two points in a system, such as across an airfoil, filter, or component. It is commonly used to assess the performance or integrity of certain aircraft systems.The mass flow rate (ṁ) through a differential pressure testers
- ṁ = Mass Flow Rate (in kilograms per second, kg/s)
- V = Velocity of the Tester (in cubic meters, m³)
- ρ = Density of the air or mixture (in kilograms per cubic meter, kg/m³
- A = Cross sectional area of the tetser (a dimensionless value between 0 and 1)