Questions

[Seth Allen]

On Wed, 11 Jun 1997, Christopher E. Hill wrote:

> Date: Wed, 11 Jun 1997 14:26:04 -0400
> From: Christopher E. Hill <chill6 at utk.edu>
> To: diy_efi at coulomb.eng.ohio-state.edu
> Subject: Questions
> 
> Ladies and Gentlemen,
> 	I have lurked on this list for about 6 months, and now I finally get enough
> time to ask a few questions:
> 
> 1.  On dealing with mass flow rate, formula M(dot)=(Volumetric Efficiency *
> absolute pressure)/(R * absolute temperature), could I assume that the VE is
> going to be constant for at that particular rpm, regardless of  temperature
> and pressure?  This is from my Thermodynamics I book.  
> 2.  On programming using vectors, what language should I use?  I had BASIC
> in high school, and I think I can figure out the logic of any language.
> 3.  With VE's and turbocharged applications, will the M(dot) equation be the
> same as above?
> 
> Thanks,
> 
> PATSY HILL
> 
> 
Um, I wouldn't make that assumption about VE right off, as VE is affected 
by Helmholtz resonance(tuned length, or pressure wave supercharging), and as 
the speed of sound changes with density 
(and to a small degree temperature)  and this Helmholtz resonation will 
affect VE.  
I doubt that this effect is significant, unless the temp or density changes 
are large. But I am not an expert. But, I would be willing to bet that the 
SAE has a few papers on just this topic...  


Seth Allen