Averaging Pitot Tube Pdf Printer
A pitot tube can be used to measure fluid flow velocity by converting the kinetic energy in a fluid flow to potential energy.The principle is based on where each term of the equation can be interpreted as pressurep + 1/2 ρ v 2 + ρg h= p + 1/2 ρ v 2 + γ h= constant along a streamline (1)wherep = (relative to the moving fluid) (Pa)ρ = of fluid (kg/m 3)v = flow velocity (m/s)γ = ρ g = (N/m 3)g = (m/s 2)h = elevation height (m)Each term of the equation has the dimension force per unit area N/m 2 (Pa) - or in imperial units lb/ft 2 (psi). Static PressureThe first term - p - is the static pressure. It is static relative to the moving fluid and can be measured through a flat opening in parallel to the flow.
Dynamic PressureThe second term - 1/2 ρ v 2 - is called the. Hydrostatic PressureThe third term - γ h - is called the. It represent the pressure due to change in elevation. Stagnation PressureThe Bernoulli Equation states that the energy along a streamline is constant - and can be modified top 1 + 1/2 ρ v 1 2 + γ h 1= p 2 + 1/2 ρ v 2 2 + γ h 2= constant along the streamline (2)wheresuffix 1 is a point in the free flow upstreamsuffix 2 is the stagnation point where the velocity in the flow is zero Flow VelocityIn a measuring point we regard the hydrostatic pressure as a constant where h 1 = h 2 - and this part can be eliminated. Since v 2 is zero, (2) can be modified to:p 1 + 1/2 ρ v 1 2 = p 2 (3)orv 1 = 2 (p 2 - p 1) / ρ 1/2= 2 Δp / ρ 1/2 (4)whereΔp = p 2 - p 1 (differential pressure)With (4) it's possible to calculate the flow velocity in point 1 - the free flow upstream - if we know the differential pressure difference Δp = p 2 - p 1 and the density of the fluid.It is common to use. (4) can be modified by dividing with specific weight γ tov 1 = c 2 g Δh 1/2 (5)wherec = coefficient - depending on reference liquid and units used or calculatedg = acceleration of gravityΔh = h 2 - h 1 = height difference (fluid column)Note!
Averaging Pitot Tube Pdf Printer Software
- in the basic equation the head unit is with reference to the density of the flowing fluid. For other units and reference liquids - like mm Water Column - check.
The Pitot TubeThe pitot tube is a simple and convenient instrument to measure the difference between static, total and dynamic pressure (or head).The head - Δ h - (or pressure difference - Δp) can be measured and calculated with the help of, electronic pressure transmitters or similar instrumentation.Air Flow - Velocity and Dynamic Head ChartThe charts below are based on air density 1.205 kg/m 3 and water density 1000 kg/m 3.Note that as indicated in the diagram above - pitot tubes are not suited for low velocity flow. Due to low dynamic pressure (head) the readings will be inaccurate. Water Flow - Velocity and Dynamic Head Chart.Flow Metering - Point Velocity Area MethodThe point velocities in a duct, channel or pipe can be measured by traversing the cross-sectional area of the conduit. We don't collect information from our users.
Pitot Tube Specifications
Only emails and answers are saved in our archive. Cookies are only used in the browser to improve user experience.Some of our calculators and applications let you save application data to your local computer. These applications will - due to browser restrictions - send data between your browser and our server. We don't save this data.Google use cookies for serving our ads and handling visitor statistics. Please read for more information about how you can control adserving and the information collected.AddThis use cookies for handling links to social media. Please read for more information.
././././. In-Line (Averaging Pitot Tube)In-Line (Averaging Pitot Tube)In-line Flow Sensors are compatible with gases and liquids and contain a velocity pressure output for liquid or gas indication of flow rate. Used by being inserted in the pipeline through a compression fitting. Available is a portable kit that contains a differential pressure gauge which is suited for use as a read-out device.