the jet propulsion with closed combustion type

[qumf]

HiFINITLYDISTRUBD

I study what you wrote THOUGH I still have sth not clear.

I need remind you sth according to my understand about your explanation:
1. you need modify the turbo-charger, basically make place for other components, such as combustion chambers; pipes and so on.
2. do you think the reed in reed valve has enough strength to bear the high pressure? Pls check and calculate. It would bear 10 bar gas pressure as well as high temperature.
3. do you think the reed can work at the high frequency, at least over 150HZ
4. the reed’s work should avoid energy lost much as possible as it can.
5. What is “a glow plug”?
6. Can you ignite the gas rapidly by electric method at very high frequency?
7. These accessories you noted are necessary to support the jet. For now they are not specialized designed for the new type. Later they will be lighter after improvement.

[qumf]

Hi, DFINITLYDISTRUBD:

I forgot to remind you sth:
In my momery, the current in common turbo-charger isn't axial flow.If you need it change the flow's direction to axial get the push force, that would influence the efficiency of engine because it will lost some energy while changing direction.

The common turbine is designed for get more energy as much as possible.But it isn't I only desire. I hope the gas still have much energy after turbine to produce push force.

[GAHD]

I'm still following, i'd like to see a schematic or some pics of one of these engines, they sound like fun to play with.

FYI Glow plug

[DFINITLYDISTRUBD]

First off thanx GAHD for saving me an explanation!

Secondly the second reed aparently is not capable of surviving the violent environment of the exhaust stream (post combustion chamber) as upon inspection of my working prototype it is strangly missing (he he!) though the intake reed is fine.
As far as how much pressure it can withstand please note that reed valves have been withstanding the high compression of piston engine use for many years now in everything from gas trimmers to large comercial diesels in tractor-trailors. Also in 2-cycle engines (dirt bike, 4-wheeler, etc.) they are fully capable of opperating at up to 416Hz+ @25,000 rpm.

Thirdly as far as ignition rate I'm pretty sure it's nearly constant. Playing around with various goodies I have around the ol shop I've built "sparkies"
that spark at 35Khz. (currently I'm trying for 999Mhz).

Lastly what the heck is "sth"

[qumf]

Originally Posted by GAHD

I'm still following, i'd like to see a schematic or some pics of one of these engines, they sound like fun to play with.

FYI Glow plug

sorry,GAHD:

I can't open "http://en.wikipedia.org/wiki/Glow_plug", try other ways and tell me.

thanks

[qumf]

Originally Posted by DFINITLYDISTRUBD

Secondly the second reed aparently is not capable of surviving the violent environment of the exhaust stream (post combustion chamber) as upon inspection of my working prototype it is strangly missing (he he!) though the intake reed is fine.
As far as how much pressure it can withstand please note that reed valves have been withstanding the high compression of piston engine use for many years now in everything from gas trimmers to large comercial diesels in tractor-trailors. Also in 2-cycle engines (dirt bike, 4-wheeler, etc.) they are fully capable of opperating at up to 416Hz+ @25,000 rpm.

Not only the pressure of the gas the reed bears we should consider, but also we should consider the the size of reed. because they are all related to the force that the reed bears. the force and the strength are different if they have different size even though the reed bear the same pressure of gas. the size is bigger, the strength required is higher.

You also should consider the temperature of the gas that the reed bear. that is also important.

In my momery, the piston engine's the intake valve and exhaust valve aren't the reed valve type.Why do you the one has the valve?

Your 2-cycle engines can work @25000rpm. It is too high. it is out of my image.

[qumf]

In this new type jet engine.
Some parts bear very high temperature, they touch high temperature gas at short time. They also touch cool temperature gas at other time.
2. Some parts touch high temperature gas always, but the temperature is not very high.The density of the gas is small and the "c" of the gas is small also.These parts can be cooled from another side also.
3. Few parts always touch very high temperature gas, such as some place in the front door. If we haven't other method really, we can input cool clean gas through small holes from other place in the front door. (at a certain moment or always). The method can cool the place or isolate the place from the very high temperature gas. We also can input cool air to cool the front door inside or another side.

[GAHD]

"Glow plugs are used to heat the combustion chambers of diesel engines in cold conditions to help ignition at coldstart. In the tip of the glow plug is a coil of a resistive wire or a filament which heats up when electricity is connected.

Glow plugs are required because diesel engines produce the heat needed to ignite their fuel by the compression of air in the cylinder and combustion chamber." -quote & image coutosy of wikipedia.com

[qumf]

Thank you ,GAHD

[qumf]

Originally Posted by DFINITLYDISTRUBD

First off thanx GAHD for saving me an explanation!
As far as how much pressure it can withstand please note that reed valves have been withstanding the high compression of piston engine use for many years now in everything from gas trimmers to large comercial diesels in tractor-trailors. Also in 2-cycle engines (dirt bike, 4-wheeler, etc.) they are fully capable of opperating at up to 416Hz+ @25,000 rpm.
"

What is the movement formation of reed in reed valves? Can it allow a lot of gas pass the hole?