#Calculate velocity using a pitot tube full#

The difference between stagnation and static pressure in one point of flow streamline Part of streamline is called static pressure. Prandtl probe, the flow velocity is unimpaired, and the pressure measured at that On the outer part of the Prandtl probe where flow streamlines are tangent to the Measured pressure in that point equals total pressure. When flow velocity is zero at some point of streamline,

With a Prandtl probe, you can measure flow velocity indirectly, by measuring aĭifference between stagnation pressure and static pressure of flow in a single pointĪ Prandtl probe measures stagnation pressure in the central part of a Prandtl probe, What has to be understood to perform the calculation? Measurement of air flow in a rectangle and round channels. However, it is also suitable for velocity You can use a Prandtl probe as flow velocity metering instrument mainly for

#Calculate velocity using a pitot tube full#

ρ fluid density T temperature Select pipe shape round pipe full cross section fluid flow rectangular duct for rectangle channels and full cross section flow p t total (stagnation) pressure p d dynamic pressure Select value to input. p - static pressure Measured pressure of the flow without the affect of the fluid movement (kinetic) energy ρ - fluid density Mass per unit of volume R - gas constant Gas constant in terms of energy per unit of mass and temperature, for gas density calculation using ideal gas state equation κ - isentropic coefficient Specific heat ratio T - temperature Fluid temperature for gas density calculation based on the ideal gas state equation q - volumetric flow rate Fluid flow rate in terms of units of volume per unit of time ṁ - mass flow rate Fluid flow rate in terms of units of mass per unit of time V - velocity Flow velocity in terms of units of distance per unit of time c - speed of sound Sound speed for given gas and actual conditions in terms of pressure, density and temperature M - Mach number Flow velocity and actual speed of the sound ratio D - internal diameter Internal circular pipe diameter A - area Internal pipe cross section area h - channel height Height of the channel for rectangled closed pipe line w - channel width Width of the channel for rectangled closed pipe line Calculation setup Select value to input. Description p t - total (stagnation) pressure Measured pressure of the stream when flow velocity is brought to zero isentropically, in the center of the Prandtl probe p d - dynamic pressure Differential pressure calculated as the difference between the total (stagnation) and the static pressure.