There doesn't seem to be any proper online source that describe these flows properly.(adsbygoogle = window.adsbygoogle || []).push({});

Please explain the following points that i read about on wikipedia:

1."The heat addition causes a decrease in stagnation pressure, which is known as the Rayleigh effect and is critical in the design of combustion systems"...why is this so important?

2. "unlike Fanno flow, the stagnation temperature is a variable"-- is this because we're considering uniform cross-sectional area and no mass change, so due to heat addition/removal the net energy at any point will vary?

3. Can anyone tell me where I could find a derivation of the formulae related to Rayleigh flow found in the wikipedia article http://en.wikipedia.org/wiki/Rayleigh_flow?...similarly for Fanno flow.

Thanks a lot!

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# Rayleigh and Fanno flows:

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