the jet propulsion with closed combustion type

[qumf]

DFINITLYDISTRUBD:

I have no idea how many cfm these can achieve

How to estimate the cfm of the turbo?
Because you picked the turbo-charger from the truck, you can know what engine is fixed the turbo(or similar engine), you can know the approximate displacement and the RPM of the engine, then you can know the cfm of the compressor. But the cfm is possible maximum value. The actual value is less than it.
I also think pressure 50psi higher, but if actual currency volume(displacement)/working frequency is bigger than the originally engine in truck, and it is in proper range, the pressure will decrease.

I still worry if the rotary valve can bear the high pressure.

[DFINITLYDISTRUBD]

Yup...

Still seeking engine and turbine specs...wish I had more time to devote to this!!!!!!! Soon I hope these long work weeks are killing me!

[qumf]

I feel little guilty that I can not help you more. I have not more practice experience than you about the current engine. I believe that you can find the specification. Don’t worry, the time and money spent on the preparation must be repayed later definitely.
There are some courses haven’t be figure out clearly. I must leave my mind into the courses.

[qumf]

I think the compressor and turbine’s specification you found are ranges, you should know how wide range they can work, including the several related parameters’ change trend in the range. Which point is the most efficient, which point is used most frequently? Those are useful for your work.
You should think which point is fit for your engine? You can make how wide variation while modification.

[DFINITLYDISTRUBD]

Ranges: 0-120psi (80psi max safe pressure)
0-2000 cfm (dependant on rpm and pressure)
0-280,000 rpm (200,000 max safe rpm)
Typical:

900 cfm @ 50psi @ 120,000 rpm

Now for the real trick calculating the flow capabilities of the combustion chamber and valves!!! auuuuuuuuuuuuuuuuuuuuuuuuuuuuuuugh!!!!!!

[qumf]

DFINITLYDISTRUBD:

for now I think 80psi is too high if you use my disign.. We needn't the so high pressure because the jet can get pressure further higher by the combustion. If you use your design,maybe the combustion can't provide the very high pressure because you don't utilize all volume as air.Thus you need to adopt a higher pressure.

In my design, I think the pressure from compressor is 30-35psi is proper. I prefer you can get more cfm.

i also think the rotation speed is too high(120,000 rpm). if you drive the rotary valve by the turbine, you should reduce the rotary speed a lot to the valve by other transmission case.

I'll calculate and give some idea if there is sth need to be updated.

Any question, pls ask me.

[qumf]

DFINITLYDISTRUBD:

What size of the compressor is? Is it 6” that you said before?
I calculate roughly, the inlet hole of the compressor is about 2”. Is it close to real diameter?
I am not familiar with centrifugal compressor.

You can try to drive the valve with very high speed; your design is different from mine after all. But you should prepare to reduce the speed if it is not effective. The transmission is small size because it need not to transfer big energy.

[DFINITLYDISTRUBD]

900 cfm @ 50psi @ 120,000 rpm

#205^

this is the max reasonable operational data for the engine the turbos were removed from.

Psi for my jet is unknown at this point...I'm shooting for more Cfm than Psi ... but this will bedetermined by the flow characteristics of the combustion chamber and valves.

[qumf]

DFINITLYDISTRUBD

I know why you prefer higher pressure than more currency. You can’t be clear what pressure that the combustion in your jet can get.
Is there enough energy to drive the turbine?
I remind: but only the energy from combustion to turbine should be taken into account, you also consider the additional energy to create pull force. It is a propulsion that you want to make.
It is hard for me to estimate the pressure from combustion in your design though the mechanical structure is simpler than mine. The combustion in your jet is neither completely nor kept closed in volume comparatively. It is hard to estimate the increase on pressure.

[DFINITLYDISTRUBD]

I know why you prefer higher pressure than more currency.

-QUMF

I'm shooting for more Cfm than Psi

-DD
Actually I'm aiming for more flow than higher pressure (though a maximum of both is the ideal result.)