Compression ratio and compression test readings.

[Greg Hermann]

At 10:19 AM 10/17/01, Eric Fahlgren wrote:
>Greg Hermann wrote:
>
>> You need to look up the equation for an "adiabatic" compression process in
>> order to get an idea of what is going on.
>
>Here ya go:
>
>   Trise = (PR^0.283 - 1) * Tambient

Yep. Where .283 = (k-1)/k, "k" for air =1.395 = the ratio of Cp/Cv . Cp
=specific heat at constant pressure, Cv =specific heat at constant volume.
"k"varies with the molecular weight of a gas.

Greg
>
>where
>
>   Trise    = increase in temperature
>   PR       = pressure ratio
>   Tambient = ambient temperature (in an absolute scale, Kelvin or Rankine)
>
>--
>Eric Fahlgren                            Mechanical Dynamics, Inc
>efahl at adams.com                          Ann Arbor, Michigan, USA
>----------------------------------------------------------------------------
>To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes)
>in the body of a message (not the subject) to majordomo at lists.diy-efi.org


----------------------------------------------------------------------------
To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org