Piotless nozzle
View Patent ↗A method and device for obtaining an accurate flow rate measurement through a fluid flow system. A nozzle and gauge tapping combination is connected to a fluid flow system. Fluid enters the nozzle as turbulent flow. As the fluid passes through the nozzle, the turbulent flow is converted to laminar flow due to the shape of the nozzle. Once in laminar flow, the pressure at that point in the nozzle is constant, and therefore the pressure, and thus flow rate, can be measured with greater accuracy.
1. A method for fluid flow measurement, comprising the steps of:
attaching a constant pressure nozzle having a tapered chamber with a single gauge tapping to a fluid flow system;
flowing fluid through the constant pressure nozzle having the tapered chamber with the single gauge tapping;
converting said flowing fluid from turbulent flow to laminar flow in the tapered chamber so as to create a measured constant pressure through-out the tapered chamber;
taking a measurement of the constant pressure of said laminar flow via the single gauge tapping; and
comparing the measurement of the constant pressure with atmospheric pressure.
2. The method of claim 1 , further comprising the step of:
converting said pressure measurement into a fluid flow rate.
3. A device for fluid flow measurement, comprising:
a constant pressure nozzle for receiving a fluid flow from a fluid flow system, the constant pressure nozzle including a tapered chamber having a nozzle inlet and a nozzle outlet and;
a single gauge tapping in said constant pressure nozzle for measuring said fluid flow by comparing internal system pressure as fluid flows through the constant pressure nozzle with atmospheric pressure;
wherein the tapered chamber of said constant pressure nozzle is shaped such that it converts said fluid flow from turbulent flow to laminate flow resulting in a measured constant pressure through-out the tapered chamber, and said gauge tapping provides for measurement of the constant pressure of said laminar flow.
4. The device of claim 3 , further comprising a pressure gauge, connected to the gauge tapping, for displaying the measurement.
5. The device of claim 4 , wherein the pressure gauge is graduated to convert to flow rate.
6. The device of claim 4 , wherein the pressure gauge does not interfere with the fluid flow.
7. The device of claim 3 , wherein the single gauge tapping has a gauge connection, a pressure translating tube, and a nozzle side inlet which opens to the tapered chamber without entering the tapered chamber and without obstructing fluid flow.