- #1
jmex
- 59
- 3
Hello,
I found this from junk. Can you tell me what this is?
I found this from junk. Can you tell me what this is?
What Is "Hello, I Found From Junk
- Thread starter jmex
- Start date
In summary, this is a cut-away "real world" engine from the 1950s with twin radial compressors. Most of the structure "in front of" the compressors (at the left of the picture) is the reduction gearbox to drive the aircraft propeller, not part of the engine itself.
- #2
Q_Goest
Science Advisor
Homework Helper
Gold Member
- 3,012
- 42
Turbocharger? One impeller compresses air, the other impeller expands it.
- #3
Bandit127
Gold Member
- 278
- 35
Yes, it is part of a turbocharger. Called the "core" it sits inside a housing that ducts the air.
- #4
jmex
- 59
- 3
thanks for your help. I am willing to use impeller and compressor in a jet engine out of it. Is it possible to use this existing design?
- #5
jmex
- 59
- 3
I mean a small one.
- #6
Baluncore
Science Advisor
2023 Award
- 15,667
- 9,404
Possibly yes, turbochargers are used to make amateur turbojets. There are many out there. Search the web for sites.
The problems you will have is the quality of the shaft bushing and the provision of forced lubrication. The shape of the outer case of the rotor balances the forces on the centre bearing. You will have to design for that axial pressure.
The material used for the turbines is often different for a diesel or a gasoline engine. You will need to keep your exhaust temperature cool enough, and with the right oxygen level to prevent corrosion or melting of the turbine.
The problems you will have is the quality of the shaft bushing and the provision of forced lubrication. The shape of the outer case of the rotor balances the forces on the centre bearing. You will have to design for that axial pressure.
The material used for the turbines is often different for a diesel or a gasoline engine. You will need to keep your exhaust temperature cool enough, and with the right oxygen level to prevent corrosion or melting of the turbine.
- #7
AlephZero
Science Advisor
Homework Helper
- 6,982
- 299
There are plenty of jet engine designs on the web that use a turbocharger as the compressor. But if you don't have the outer casing of the turbo as well as the rotor you showed in the pictures, that rather defeats the reason for using it, which is that building a small efficient compressor needs a "Swiss watchmaking" level engineering tolerances to be successful, otherwise air leakages between the rotor and casing will make it liable to stall and/or surge, or mechanically self-destruct if the rotor touches the casing at high RPM.
Making a turbine that is "good enough" for a working engine is much less critical. Unlike compressors, the performance of a badly designed or inefficient turbine usually degrades in a "stable" manner, rather than catastrophically.
Here's a cut-away "real world" engine from the 1950s with twin radial compressors. Note, most of the structure "in front of" the compressors (at the left of the picture) is the reduction gearbox to drive the aircraft propeller, not part of the engine itself.
Making a turbine that is "good enough" for a working engine is much less critical. Unlike compressors, the performance of a badly designed or inefficient turbine usually degrades in a "stable" manner, rather than catastrophically.
Here's a cut-away "real world" engine from the 1950s with twin radial compressors. Note, most of the structure "in front of" the compressors (at the left of the picture) is the reduction gearbox to drive the aircraft propeller, not part of the engine itself.
Last edited:
- #8
koolraj09
- 167
- 5
That's a very good picture! Thanks for sharing!
FAQ: What Is "Hello, I Found From Junk
What Is "Hello, I Found From Junk"?
"Hello, I Found From Junk" is a phrase commonly used in the field of recycling and waste management. It refers to the practice of finding useful or valuable items in discarded or unwanted materials.
Why is "Hello, I Found From Junk" important?
"Hello, I Found From Junk" is important because it promotes the idea of reducing waste and reusing materials, which helps to conserve resources and reduce the negative impact of waste on the environment.
How does "Hello, I Found From Junk" benefit the environment?
"Hello, I Found From Junk" benefits the environment by reducing the amount of waste that ends up in landfills and by conserving natural resources that would otherwise be used to create new products.
What are some examples of "Hello, I Found From Junk"?
Examples of "Hello, I Found From Junk" include finding usable items in the trash, repurposing old materials into new products, and upcycling discarded materials into something of higher quality or value.
How can individuals practice "Hello, I Found From Junk" in their daily lives?
Individuals can practice "Hello, I Found From Junk" by actively recycling and reusing materials, purchasing products made from recycled materials, and supporting businesses that prioritize sustainability and waste reduction.
Similar threads
Automotive
Would someone help with a flow simulation?