Electronic assist turbo charger

PACougar said:
And how is that tip speed generated?
Click to expand...

I imagine a smaller rotor needs more rpm to generate the same tip speed as a larger rotor at a much lower rpm. I guess we have to give a full accurate description or everything discussed in this thread otherwise the post is null and void.

Equation for tip speed in case I didnt get technical enough for somebody:

Speed is simply distance over time. V=d/t

In this case distance is circumference.

Circumference is the length of the outer edge of a circle.

Calculated as pi x diameter or 2 x pi x radius

Combine the two and you get v=((pi x d)/rev)/time

Replace time with RPM as follows

v=(pi x d) x RPM

Example 66mm turbo:

v=(pix66mm) x 100,000 rev/min

v=3.14 x 66mm x 100,000 rev/min

v~20,724,000 mm/min

Convert to meters/hour

20,724,000 mm/min x 1m/1000mm x 60min/hour

1,243,440 meters per hour.


Oh and by pi I am referring to the numerical value that associates radius of a circle to the circumference not the food. Didn't want to catch chit for a misspelling.

And PAcougar you aren't that somebody it just so happens you were the one i quoted.
 
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PACougar said:
And how is that tip speed generated?
Click to expand...

Wheel diameter vs. rpm , use BW Matchbot wheelspeed calculator and you might understand atleast something. http://www.turbos.bwauto.com/aftermarket/matchbot/index.html#version=1.3&displacement=2&CID=122.04&altitude=500&baro=14.502&aat=75&turboconfig=1&compressor=70s75&pt1_rpm=2000&pt1_ve=85&pt1_boost=5&pt1_ie=99&pt1_filres=0.08&pt1_ipd=0.2&pt1_mbp=0.5&pt1_ce=66&pt1_te=75&pt1_egt=1550&pt1_ter=1.18&pt1_pw=NaN&pt1_bsfc=0.43&pt1_afr=11.5&pt1_wts=300&pt1_wd=83&pt1_wd2=74&pt1_wrsin=69033&pt2_rpm=3000&pt2_ve=95&pt2_boost=10&pt2_ie=95&pt2_filres=0.1&pt2_ipd=0.2&pt2_mbp=1&pt2_ce=70&pt2_te=73&pt2_egt=1600&pt2_ter=1.36&pt2_pw=NaN&pt2_bsfc=0.45&pt2_afr=11.5&pt2_wts=320&pt2_wd=83&pt2_wd2=74&pt2_wrsin=73635&pt3_rpm=4000&pt3_ve=100&pt3_boost=15&pt3_ie=95&pt3_filres=0.12&pt3_ipd=0.3&pt3_mbp=1.3&pt3_ce=74&pt3_te=72&pt3_egt=1650&pt3_ter=1.61&pt3_pw=NaN&pt3_bsfc=0.48&pt3_afr=11.5&pt3_wts=340&pt3_wd=83&pt3_wd2=74&pt3_wrsin=78238&pt4_rpm=5000&pt4_ve=100&pt4_boost=17&pt4_ie=92&pt4_filres=0.15&pt4_ipd=0.4&pt4_mbp=1.5&pt4_ce=76&pt4_te=71&pt4_egt=1650&pt4_ter=1.81&pt4_pw=NaN&pt4_bsfc=0.5&pt4_afr=11.5&pt4_wts=368&pt4_wd=83&pt4_wd2=74&pt4_wrsin=84681&pt5_rpm=6000&pt5_ve=105&pt5_boost=17&pt5_ie=90&pt5_filres=0.18&pt5_ipd=0.5&pt5_mbp=1.8&pt5_ce=72&pt5_te=70&pt5_egt=1650&pt5_ter=1.98&pt5_pw=NaN&pt5_bsfc=0.52&pt5_afr=11.5&pt5_wts=400&pt5_wd=83&pt5_wd2=74&pt5_wrsin=92044&pt6_rpm=7000&pt6_ve=105&pt6_boost=17&pt6_ie=90&pt6_filres=0.2&pt6_ipd=0.6&pt6_mbp=2&pt6_ce=66&pt6_te=70&pt6_egt=1650&pt6_ter=2.18&pt6_pw=NaN&pt6_bsfc=0.55&pt6_afr=11.5&pt6_wts=400&pt6_wd=83&pt6_wd2=74&pt6_wrsin=92044&
 
You sound like 300D. Who came back as someone else who got banned. Now you're starting to sound like him yet again
 
They have used electronic turbochargers on big slow speed two stroke diesels in ships for awhile now. They call them "boost blowers". As soon as the turbo gets to speed they declutch and the turbo acts like a normal turbo. They are only used in low load conditions. Slightly different compared to this technology but similar fwiw.
 
EMDs in locomotives declutch the blowers too. Not electronic though.

It sounds awesome when they zing and lift off the flywheel.
 
Just FYI I work on EMD engines and they do have drive clutches on the turbos but they are clutched to the rear gear train not the flywheel
 
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