What Does the Graph in My Compressive Flow Experiment Indicate?

He mentions that the nozzle is converging-diverging and is curious about the relationship between the graph and sonic speeds. He also knows the critical pressure ratio for air and notices that as the pressure difference increases, the P/Po values approach the critical ratio. John is looking for help before his Friday deadline. In summary, John is seeking assistance in understanding a graph he created that shows pressure variations in a converging-diverging nozzle. He is curious about the relationship between the graph and sonic speeds, and also notes that the P/Po values approach the critical pressure ratio as the pressure difference increases. He needs help before Friday.
  • #1
bortonj88
16
0

Homework Statement


Wondering if anyone could give me a hand, I have created the attached graph. It shows the variations of pressure in the nozzle for different supply pressures and back pressures, in the form, P/Po vs position of the nozzle. and not too sure what its showing


Homework Equations


Wondering if anyone can help me figure out what the graph is showing??


The Attempt at a Solution


Picture1.png
 
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  • #2
I didn't mention that the nozzle a converging- diverging nozzle. Also I know that at the throat of the nozzle the fluid cannot reach speeds above Mach 1, sonic speeds. However i am wondering where on the graph this relates too.\

I also know that the Pc/Po(critical pressure ratio) for air is 0.5283 and it seems that as the pressure difference becomes larger the closer the P/Po becomes to the critical ratio value.

Any help will be greatly appreciated as this has to be submitted by friday.

Thanks
John
 
Last edited:
  • #3


I would be happy to assist you with understanding your graph. Based on the information provided, it seems that you have conducted a compressive flow experiment and have plotted the variations of pressure (P) in the nozzle for different supply pressures and back pressures. The graph is in the form of P/Po (pressure ratio) vs position of the nozzle. This type of graph is commonly used in compressive flow experiments to visualize the relationship between pressure and position in a nozzle.

The horizontal axis of your graph represents the position of the nozzle, while the vertical axis represents the pressure ratio. The pressure ratio is the ratio of the pressure at a certain point in the nozzle to the stagnation pressure (Po) at the inlet of the nozzle. This ratio is useful in understanding the effects of different supply and back pressures on the flow behavior in the nozzle.

From your graph, it appears that as the position of the nozzle increases, the pressure ratio decreases. This is expected in compressive flow experiments, as the flow expands and the pressure decreases as it moves through the nozzle. The different curves on the graph represent the variations in pressure ratio for different supply and back pressures. By comparing these curves, you can analyze how changes in supply and back pressures affect the flow behavior in the nozzle.

I hope this explanation helps you understand your graph better. If you have any further questions, please do not hesitate to ask. Good luck with your experiment!
 

FAQ: What Does the Graph in My Compressive Flow Experiment Indicate?

What is a compressive flow experiment?

A compressive flow experiment is a type of scientific experiment that involves exerting pressure or compressive forces on a material in order to study its behavior and properties under such conditions. This can be done using a variety of techniques and equipment, such as compression testing machines, to measure properties like strength, elasticity, and deformation.

Why is compressive flow experimentation important?

Compressive flow experimentation is important because it allows scientists to better understand the behavior and properties of materials under compressive forces, which can be useful in a variety of industries such as engineering, construction, and materials science. This information can also help in developing stronger and more durable materials for various applications.

What are some common materials used in compressive flow experiments?

Some common materials used in compressive flow experiments include metals, polymers, ceramics, and composites. These materials are often chosen for their strength, flexibility, and other properties that make them suitable for withstanding compressive forces.

How is data collected and analyzed in compressive flow experiments?

Data in compressive flow experiments is collected using specialized equipment such as compression testing machines, which can measure the amount of force applied and the resulting deformation of the material. This data is then analyzed using mathematical models and statistical methods to determine the material's properties and behavior under compressive forces.

What are some potential applications of compressive flow experiments?

Compressive flow experiments have a wide range of potential applications, including designing and testing materials for use in construction, developing new manufacturing processes, and understanding the behavior of materials under extreme conditions such as earthquakes or explosions. This research can also lead to advancements in fields like aerospace, automotive engineering, and biomechanics.

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