[Karan]

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

[FMDenaro]

Originally Posted by Karan

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?

[agd]

And what length scale are you using for the Reynolds number?

[FMDenaro]

Originally Posted by agd

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

[FMDenaro]

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

[agd]

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.