Calculating Jet Pressure at Nozzle orifice

In summary, the conversation is about using a 3HP pump with a head range of 6-14 meters and discharge of 19.1-10.4 LPS. The water is then sprayed out of jet nozzles for washing. The question is about the pressure at the nozzle exit and how to calculate it using Bernoulli's equation. The conversation also includes a link for more information on Bernoulli's equation.
  • #1
kunalv
16
0
Hello,

So i am using this 3HP pump for which the head ranges from 6 meters to 14 meters. Discharge being 19.1 LPS to 10.4 LPS respectively.

I am using a 2" pipe to carry the water upto a height of approx. 3 meters, which is then routed into a jet manifold containing number of jet nozzles.

The water is then sprayed out of these nozzles onto the component for washing.

So, my question is, what would be the pressure of the jet at the nozzle exit? And how do i calculate it?

Sorry if this is a stupid question :redface:

Any help would be appreciated.

Thanks.
 
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  • #2
The pressure at the exit of your nozzle would be zero because you're open to atmosphere. At this point you should be more interested in the fluid momentum which will be based off of fluid velocity. To caclulate the fluid velocity you would need to use Bernoulli's equation to take in consideration of the head ranges and the initial head or pressure the pump will provide.

Bernoulli's equation is P1+1/2ρv12+γz1=P2+1/2ρv22+γz2

You can learn more about Bernoulli's equation here Bernoulli's[/PLAIN] Equation
 
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1. How do you calculate jet pressure at a nozzle orifice?

To calculate jet pressure at a nozzle orifice, you can use the Bernoulli's equation which takes into account the velocity and density of the fluid, as well as the pressure at a specific point. The equation is P + 1/2ρv^2 + ρgh = constant, where P is pressure, ρ is density, v is velocity, g is gravitational acceleration, and h is height. By rearranging the equation, you can solve for pressure at the nozzle orifice.

2. What factors affect the jet pressure at a nozzle orifice?

There are several factors that can affect the jet pressure at a nozzle orifice. These include the velocity and density of the fluid, the shape and size of the orifice, the surrounding pressure and temperature, and the viscosity of the fluid. Additionally, any obstructions or irregularities in the flow can also impact the jet pressure.

3. Can the jet pressure at a nozzle orifice be increased?

Yes, there are several ways to increase the jet pressure at a nozzle orifice. One way is to increase the velocity of the fluid by using a pump or compressor. Another way is to decrease the size of the orifice, which will increase the pressure due to the Bernoulli's equation. Additionally, increasing the density of the fluid or decreasing the surrounding pressure can also result in higher jet pressure.

4. How do you measure the jet pressure at a nozzle orifice?

The jet pressure at a nozzle orifice can be measured using a pressure gauge or transducer. The gauge or transducer should be placed at the desired location to measure the pressure, such as at the nozzle orifice itself. It is important to ensure that the gauge or transducer is properly calibrated and that the measurement is taken at the same time and conditions as the jet pressure calculation.

5. Why is it important to calculate the jet pressure at a nozzle orifice?

Calculating the jet pressure at a nozzle orifice is important for several reasons. It can help in the design and optimization of fluid systems, as well as in predicting the performance of nozzles and other hydraulic components. It is also crucial for safety and maintenance purposes, as knowing the jet pressure can help prevent damage or failure of equipment due to excessive pressure. Additionally, understanding the jet pressure can aid in troubleshooting and diagnosing any issues in the system.

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