SV: SV: "Leaf Blower" Forced induction idea

[espen hilde]

Dear Stewart!
Thanks !
Would be nice to know the math so deaply that it would be possible to 
calculate it all and  not have to get my hands dirty to prove it......
But maybe real life horsepower is more impressing after all?
I have something I would love to have calculated.....would make it possible 
for me to convice people about a idee I have I will contact you off list if 
its ok?
I have difficoult of understanding some things below :
Stewart Prince [SMTP:sprince at csun.edu] skrev 19. mars 2001 18:23:
> Espen
> Here are the equations:
> assuming upstream stagnation temp(whats that?) is 300 deg Kelvin, 
compressor efficiency is .7,
> and specific heat ratio(whats that?and how do you know its) 1.4,and the 
engine volumetric efficiency is .85
> air density= 1.18 kg/m^3
> cpair=1(kj/kg K)
> Mdotair (kg/sec)=Eng_disp(cm^3) x vol_eff x density_ratio x air 
density(kg/m^3) x
> RPM
>
> ---------------------------------------------------------------
>                                                            2 x 60 x 100^3
> power(kwatt)=
>
> Mdot(?)air(kg/sec) x cp(?)air(kj/kg K) x Temp (K)/comp_eff x 
[press_ratio^.285 - 1]
> try this with 2000 cc at 3000 rpm and you should get about
> mdotair=.075 kg/sec
> compressor power =3.5 kwatt
> this might really work for your application.........
>Pling !
It just struk me.....The way to do it realy nice, is to use an electrical 
engine..
to drive a small turbo compressor designed to work at idle speed and up to
a air delivery where the second exhaust driven turbo spools up rapidly.
That way we dont need the big electrical engine, Lets say that 2 hp 
electrical engine is max suited size in a small car ,how high RPM could 
this amount of hp deliver air at 1 bar to a 2000cc engine?
With lots of money the starter engine could be designed to run backwards
to drive the turbo compressor and be a regular starter the other way...with 
a nice japanese ball bearing start engine.Less weight .......
would this
work Stewart?
Thanks
Espen
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