Question about what happens to density of airflow through a heated tube

AI Thread Summary
Heating air in a copper tube with a blowtorch affects its density and behavior as it flows into a piston cylinder system. The increased temperature from the blowtorch reduces the air density, leading to changes in airflow characteristics compared to an unheated scenario. This phenomenon can be analyzed using Rayleigh flow principles, which describe how temperature variations impact airflow. The heated air will enter the cylinder with different velocity and pressure dynamics due to the reduced density. Understanding these effects is crucial for applications involving heated airflow systems.
Green Zach
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I know the basic equations for airflow, but for some reason this question has been puzzling me: say you have a copper tube open at one end and connected to a piston cylinder system at the other. Air is drawn through the copper tube and into the cylinder as the piston moves from top to bottom, and while this is going on you are holding a blowtorch up to a section of the copper tube and thus transferring some heat to the flowing air. Other than increased temperature, how would the air entering the cylinder differ from the exact same experiment minus the blow torch? For some reason this is really bugging me.
 
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RIGHT! I'm an idiot... Just to clear it up you would probably be able to figure this out using Rayleigh flow.
 

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