Pressure required for air flow through nozzle

In summary, the conversation is about determining the maximum compression speed that can be applied to a rectangular bladder with an open air port to avoid rupturing the bladder. The bladder is 40" wide, 100" long, and 10" tall, and filled with air. The compression equipment is a large metal panel that is larger than the surface area of the bladder, and the port has an internal diameter of 0.50" and is made of rigid material. The bladder has a maximum internal psi capacity of 0.5psi to avoid ruptures. The question at hand is whether there is a way to calculate the rate of compression that can be achieved without rupturing the bladder, ignoring the flexing of the bladder material.
  • #1
I need to know the maximum compression speed that can be applied to a rectangular bladder which has a open air port that will avoid rupturing the bladder. The bladder is 40" wide, 100" long, and 10" tall. The compression equipment is a large metal panel that is larger than the surface area of the bladder. The material inside the bladder is air. The port has an internal diameter of 0.50" and is a rigid material. The bladder has a maximum internal psi capacity of 0.5psi to avoid ruptures. Ignoring the flexing of the bladder material, is there a way to calculate this rate of compression that I could achieve while not rupturing the bladder? Thank you.
 
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  • #2
Is this a real life situation, and is the port detachable from the bladder? You could merely install a gauge between the outlet and the .5" orifice to find your answer. Even if it's molded in you could attach a gauge and then another orifice, giving you something akin to a differential compression tester, but it would be inaccurate, probably under-reading.

If this a homework question you should post this on the Homework Forums.

Most of my experience as a tech with measured ports is their usage as limiting factors. So, from my perspective, you would be dealing with the area of the bladder, the time needed for the amount of air from the full bladder to flow through the orifice at .5 PSI (length of the orifice matters}, and I think you should be able to solve for the weight needed from there.

Don't look at how to keep the bladder from rupturing; solve for being able to get the air out, which is calculable easily. Then calculate the weight needed to do that.

If this is real world, you could have flow charts on hand. Or as they say on here a lot, 'Google is your friend.'

//edits for clarity//
 
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1. What is the relationship between pressure and air flow through a nozzle?

The pressure of a gas is directly related to its flow rate through a nozzle. As the pressure increases, the flow rate also increases. This is due to the fact that as the gas molecules gain more energy from the increase in pressure, they move faster and are able to flow through the nozzle at a higher rate.

2. How does the size and shape of a nozzle affect the pressure required for air flow?

The size and shape of a nozzle can greatly impact the amount of pressure required for air flow. A smaller, more constricted nozzle will require a higher pressure to push the air through, while a larger, more open nozzle will require less pressure to achieve the same flow rate.

3. What are the units of measurement for pressure and air flow?

Pressure is typically measured in units of Pascals (Pa) or pounds per square inch (psi), while air flow is commonly measured in liters per minute (L/min) or cubic feet per minute (cfm).

4. How does the temperature of the air affect the pressure required for air flow through a nozzle?

The temperature of the air can have a significant impact on the pressure required for air flow through a nozzle. As the temperature increases, the gas molecules gain more energy and move faster, resulting in a higher flow rate. This means that a higher pressure will be needed to achieve the desired flow rate.

5. What factors can cause a difference in the required pressure for air flow through a nozzle?

There are several factors that can affect the pressure required for air flow through a nozzle. These include the size and shape of the nozzle, the temperature and density of the air, and any obstructions or restrictions in the flow path. Other factors such as altitude, humidity, and the properties of the gas being used can also play a role in determining the required pressure for air flow through a nozzle.

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