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Shocks at Re 100

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Old   October 23, 2013, 22:09
Default Shocks at Re 100
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Karan Bansal
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Hi,

Does anybody know of any physically possible flow at Reynolds number between 100-200 and has shock waves or is compressible ?
Is it possible in compressors or gas turbines ?

thanks
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Old   October 24, 2013, 06:51
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Filippo Maria Denaro
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Originally Posted by Karan View Post
Hi,

Does anybody know of any physically possible flow at Reynolds number between 100-200 and has shock waves or is compressible ?
Is it possible in compressors or gas turbines ?

thanks
your fluid is air? how about velocity and temperature?
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Old   October 24, 2013, 09:44
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agd
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And what length scale are you using for the Reynolds number?
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Old   October 24, 2013, 09:47
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And what length scale are you using for the Reynolds number?
I think he was asking for compressor or turbine therfore I assumed the lenght is not so small, at least O(10^-1) meter ... but I can be wrong
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Old   October 24, 2013, 09:49
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Filippo Maria Denaro
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Just to clarify my opinion, I think that for real fluid (i.e., not-vanishing viscosity) there is never a schock wave if we consider that as same as the singularity developed in case of ideal gas (inviscid flow).

The Re number governs the width of the "shock layer", a zone of deep gradient but with regular solution
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Old   October 24, 2013, 13:53
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I think your assumption is a reasonable one, but the OP is somewhat confusing to me. I'm trying to imagine a turbine or compressor where the operating Re is so small. That's why I asked.
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