Normal Shock Table: P02/P01 & P1/P02 Meaning

In summary, a Normal Shock Table is a table used in aerodynamics to calculate the characteristics of a normal shock wave, such as the shock wave angle and downstream pressure and temperature. It is used to determine the properties of a normal shock wave, which occurs when a supersonic flow is suddenly slowed down to a subsonic speed. The terms P02/P01 and P1/P02 in the table represent the ratio of upstream and downstream pressures, which are used to calculate the properties of the shock wave. The values in the table are significant in understanding and designing efficient supersonic systems. However, there are limitations to using the Normal Shock Table, as it assumes perfect gas, steady and one-dimensional flow, and normal shock wave. These assumptions
  • #1
gfd43tg
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Hello,

I am wondering, on a Normal Shock Table, what are the two most right columns supposed to mean?

What is the ratio P02/P01 and P1/P02 supposed to be?
 

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  • #2
[itex]p_{02}/p_{01}[/itex] is how the total pressure changes across the shock and is essentially a measure of how dissipative the shock is since total pressure loss is a result of the entropy gained across the shock.

[itex]p_1/p_{02}[/itex] is effectively just a ratio that is useful in some calculations.
 

FAQ: Normal Shock Table: P02/P01 & P1/P02 Meaning

What is a Normal Shock Table?

A Normal Shock Table is a table that shows the relationship between the upstream pressure ratio (P02/P01) and the downstream pressure ratio (P1/P02) for a normal shock wave. It is used in aerodynamics to calculate the characteristics of a normal shock wave, such as the shock wave angle and the downstream pressure and temperature.

How is the Normal Shock Table used?

The Normal Shock Table is used to determine the properties of a normal shock wave, which occurs when a supersonic flow is suddenly slowed down to a subsonic speed. It is used in aerodynamics to analyze the performance of supersonic aircraft and to design efficient engines and nozzles.

What do the terms P02/P01 and P1/P02 mean in the Normal Shock Table?

P02/P01 represents the ratio of the upstream pressure (P01) to the total pressure (P02) before the shock wave. P1/P02 represents the ratio of the downstream pressure (P1) to the total pressure (P02) after the shock wave. These ratios are used to calculate the properties of the normal shock wave, such as the Mach number and the shock wave angle.

What is the significance of the values in the Normal Shock Table?

The values in the Normal Shock Table represent the properties of a normal shock wave for different combinations of upstream and downstream pressure ratios. These values are important in understanding the behavior of supersonic flows and designing efficient supersonic systems.

Are there any limitations to using the Normal Shock Table?

Yes, there are limitations to using the Normal Shock Table. It assumes that the gas is perfect, the flow is steady and one-dimensional, and the shock wave is normal to the flow direction. These assumptions may not always hold true in real-world situations, so the results obtained from the Normal Shock Table may not be entirely accurate.

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