Which type of pressure is primarily influenced by the speed of the airflow?

The correct answer, dynamic pressure, refers to the pressure exerted by the air due to its movement, which is directly influenced by the speed of the airflow. Dynamic pressure is calculated based on the formula ( \frac{1}{2} \times \rho \times v^2 ), where ( \rho ) is the air density and ( v ) is the airflow velocity. As the speed of the airflow increases, dynamic pressure also increases, reflecting the kinetic energy of the air moving through a system, such as ductwork.

Static pressure, while also important in fluid dynamics, measures the pressure exerted uniformly in all directions by a fluid at rest and is not primarily dependent on airflow speed. Velocity pressure is closely related to dynamic pressure, as it represents the pressure derived from the velocity of the air, but it is typically used to determine the actual air velocity and may not cover all situational aspects. Metering pressure is not a standard term related to airflow dynamics and often relates to specific applications outside general airflow measurement.

Understanding the relationship between airflow speed and the different forms of pressure is crucial in fields such as HVAC and aerodynamics, where pressure readings are essential for system design and optimization.