the jet propulsion with closed combustion type

qumf · 12-08-2005

Quote:

Originally Posted by goku

i think they already use what you are talking about, they call it a rocket engine
if that's what you're talking about.
the other engine you could be talking about is the german, so called because of the sound it males, buzz bomb engine that was used in WW2

i'm thinking jet engines are about as efficient as they can get, sure the compresser fan is heavy but it is doing two fuctions. it is compressing and acting as a propeller.

The commen rocket engine isn't as I new designed. As I know,the common rocket engine's combustion is steady, mine is discontinuous.

the compressor has two function: compressing,as a propeller. If we can find another one instead of it and have same function at whole engine, We should do.

CraigD · 12-08-2005

Quote:

Originally Posted by goku

i think they already use what you are talking about, they call it a rocket engine … i'm thinking jet engines are about as efficient as they can get, sure the compresser fan is heavy but it is doing two fuctions. it is compressing and acting as a propeller.

I agree – qumf’s idea seems a form of rocket, since the system that supplies oxidant – air in this case – isn’t, from what I can gather, meant to provide much if any propulsion.

It also appears to share features of pistons engine and pulse jets – the engine used in the V-1 “buzz bomb” goku mentions. This is an interesting, promising design, because it suggests that the engine’s fuel-air ratio could be carefully regulated, and the combustion pattern made very clean and efficient. While it might be less efficient than a conventional, high-bypass turbofan jet engine, the design might prove much cleaner, especially if a natural gas or hydrogen is used as fuel.

Other advantage that come to mind: unlike most turbofan engines, the design could work well at super-sonic speeds; the flexibility in placing the intake lends itself to the flexible placement of exhausts, making it promising for crafts like the Moller Skycar. Despite popular enthusiasm this vehicle, it continues to be plagued by such severe technical problems that I seriously doubt that the current design will every fly – doubts apparently shared by the US SEC, which recently filed this lawsuit for fraud agains Moller.

I’m interested in seeing some preliminary numeric estimates of the proposed engine’s power, weight, and efficiency, and hope that qumf can provide them, as well as sketches, soon.

qumf · 12-08-2005

I draw in a hurry, sorry, I will explain soon.
You can see that patent ZL 95237295.9 . Those pictures are good,but it is old thoght about the jet engine.You can refer it.

qumf · 12-08-2005

who can tell me how to attach picture from my picture?

Qumf

GAHD · 12-08-2005

Don't count your chickens before they're hatched fellas, qumf might surprise us all.

@qumf: I was just referring to the way the air moves coming out aof a jet; it spins. if the air was forced into a straight path there would be an increase in the thrust provided. check it out when you build your prototype: run smoke in th intake and watch it spin as it comes out the rear.

GAHD · 12-08-2005

when you reply, click the 'go advanced' button below the typing box. Scroll down untill you see a button that says 'manage attachments', use this button to upload your files.

qumf · 12-08-2005

Quote:

Originally Posted by GAHD

when you reply, click the 'go advanced' button below the typing box. Scroll down untill you see a button that says 'manage attachments', use this button to upload your files.

I can't find the button" 'go advanced' button below the typing box. what shape is it?

qumf · 12-08-2005

I draw in a hurry, sorry, I will explain soon.
You can see that patent ZL 95237295.9 . Those pictures are good,but it is old thoght about the jet engine.You can refer it.