Reynolds number - Characteristic dimension

[tuoni]

Are there any reference tables for what to use as the characteristic dimension of various shapes when calculating the Reynolds number?

I am very interested in ballistics, and have done research and calculations for various ways of estimating the drag coefficient of various bullet shapes. I already have a somewhat crude approximation, but I wouldn't mind finding something better.

This time I have chosen to use the Reynolds number as the basis to estimate drag coefficients in various flow regimes, and try to continue from there.

 

[Chestermiller]

Are there any reference tables for what to use as the characteristic dimension of various shapes when calculating the Reynolds number?

I am very interested in ballistics, and have done research and calculations for various ways of estimating the drag coefficient of various bullet shapes. I already have a somewhat crude approximation, but I wouldn't mind finding something better.

This time I have chosen to use the Reynolds number as the basis to estimate drag coefficients in various flow regimes, and try to continue from there.

There is lots of information like this online. Just Google.