RX8 jet turbine turbocharger

>>15718210
Hahahaha, retard.
I shouldn't have responded to your thread because of how lame it is but I had to make sure you know we all think you're an idiot

>>15718239
Alright, wiseguy, what exactly is "retarded" about it?

Dont worry bud, I dont think your an idiot. This is an interesting, although unnecessary concept. The thing is that the exhaust gases are already perfectly capable of spinning a turbo. So much so that you have to limit your intake for risk of engine damage.

If the exhaust already creates all the power you need, what is the sense in overcomplicating the system?

>>15718290
He doesn't know, because he's too retarded to understand jet turbines. People make turbines out of turbos all the time. The main issue with your idea is the fuel. Usually you need jet fuel to get it to work properly. Might be worth a try if you are good with fabrication and just want to give it a try. If you are trying to do this on your dd don't.

>>15718210
Because you'd need to inject fresh air into the exhaust in order to burn the fuel and the ratio of combustible air fuel mixture to spent exhaust probably isn't going to be enough to actually ignite it.

>>15718290
not him
but first thing you would need another intake for the combustion chambers (of the turbo)
the combustion chambers would need to have a lower pressure than exhaust of the engine or you would need a non return valve
let's say you make it work
you have now extra hot exaust gas spining you turbo that won't be cooled by fuel that condensate in your turbo
you have extra pressure in your exhaust that spins your turbo faster but you could have a smaller turbo and have the same result or twin turbo etc
and the rx8 has no turbo

>>15718210
so you want to burn more fuel in the exhaust, so you can force more air into the engine, so you have more fuel to burn in the exhaust?

I don't see the point OP.
Just make it run on diesel.

>>15718316
Jet fuel is more ideal for a jet engine because it's more rich; however, the idea here is to use the untapped potential of the small bit of remaining fuel that leaves the engine to provide a bit of additional torque to spin the turbo, and combusting fuel + hot gases has more energy than hot gases.

>>15718319
I'm sure a small fraction of the compressed fresh air from the turbo could be looped back into the turbine.

>>15718336
It's not uncommon for people to turbo the RX8. The idea is to use this unspent fuel to spin a turbine that would otherwise be waste.

>>15718373
Not burn more fuel in the exhaust, but burn unused fuel from the exhaust.

>>15718391
>Not burn more fuel in the exhaust, but burn unused fuel from the exhaust.
if you keep upping the boost pressure, you'll have to keep dumping in more fuel to keep the AFR right.

How can you not see that this is a negative feedback loop?

>>15718210
The closest thing you're going to get to this is an air injection system and igniters on a section of exhaust after the cat. If there's actually enough unburnt gas in the exhaust, you will end up with an anti-lag system. The amount of thrust produced will be trivial.

>>15718417
>Not burn more fuel in the exhaust, but burn unused fuel from the exhaust.
I meant that you are not injecting additional fuel into the exhaust to spin the turbo, but simply taking advantage of the remaining unspent fuel that is left to provide additional energy to spin the turbo.

When you introduce more air into the engine, you introduce more fuel into the engine. This in turn creates more wasted fuel to be burned. When this fuel is burned, it forces more air into the engine. If anything, it's a positive feedback loop.

>>15718456
It's not much but at least that fuel is being used for something. It addresses the main criticism of the Wankel engine: poor efficiency due to wasted fuel.

Just get a turbo diesel.

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you know, afterburners in the exhaust has been tried before

>>15718210
Why not skip the middleman and inject the fuel into the turbine directly? Oh wait, right, you're trying to optimize the dorito engine. It appears the first step to make rotary engines better is to replace them with literally anything else.

>>15718731
>>15718731
>>15718731
>>15718731
>>15718731
this to be honest

>>15718210
Considering even the NA ones managed to melt things with exhaust heat turbos might be a problem.
Yes it's energy being wasted but there's the reliability aspect to consider.

>>15718210
We used to call that "anti-lag".
Rubbish for fuel economy. Great for reducing turbo lag. It's the reason old rally cars would spit flames out the exhaust. Would never pass an emissions test. All in all, a fond relic of the 80's.

Something closer to a sensible idea would be a turbocompound system, where you have a second turbine connected to the crankshaft, not the turbo compressor. Some heavy-duty diesel engines use them; no idea how it would work with the rotary's torque curve. I suspect, not well, and it'll slow your engine speed as well, taking longer to hit peak torque.

>>15718510
You'll just spool up faster. Eventually you'll hit the boost threshold: the compressor has a certain max mass flow, max speed and max pressure ratio, and no matter how much energy you put into the turbine, you can't get around that. If you could just endlessly spool the turbo up to whatever crazy speeds, we wouldn't have wastegates.

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>>15718391
>Jet fuel is more ideal for a jet engine because it's more rich
wut . . .?

>>15718210
> jet turbine turbocharger

only if it's driven by 17yo
>"BOOST ON"
>"Engine shutdown to critical pressure limit (...) 4...3...2...1...."

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>wasted

its used to create fireballs

It's a wonderful idea OP should pursue.

Do it, faggot. Why are you even asking?

>Not burn more fuel in the exhaust, but burn unused fuel from the exhaust.

You need a catalytic converter to react with the remaining gas, so put a cat in front of your turbo and tell us how that works out. With dyno sheets.

>>15719201

You don't epoxy your wastegates shut?

It's like you hate fun, why even live?

>>15718210
What makes a gas turbine produce power is its pressure ratio. The higher the compression in the combustion chamber, the more power you get.

That's fine for a turbojet, where you have a compressor stage. But you want the backpressure at the engine exhaust to be as low as possible. You can trade some increase in backpressure for the power gain of a regular turbo. But if you go injecting more combustion air and igniting that mess again, your backpressure will go up and power from the primary (rotary) engine will go down.