air scram jet

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Andrew Haynes
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air scram jet

Post by Andrew Haynes » Sun Sep 01, 2013 2:34 am

Hi this is a basic design of a scram jet, the pressure from one chamber, increase the velocity of the first/second chamber velocity. As the pressure increase the same pressure get changed into velocity to sucking the income air and the cycle repeats, untill it blows.
Was thinking that at 14Mv(past binding energies) the fuser would be close to breakeven, and with magnetic compression high rates could be achieved, Using the RT gas law the output thrust would be greater than the input. Designs of the geometry for compression and acceleration would need to be worked out, but it would be starting at 3000K plasma temperatures.
The design is to be burnt up, so internal temperatures isn't much of a issue.
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Richard Hull
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Re: air scram jet

Post by Richard Hull » Tue Sep 03, 2013 4:07 pm

The design would start at 3,000 kelvins! Wow! Well only another 500,000,000 kelvins to go. We are on our way now boys.

This isn't fusion; it is an ill conceived chemistry project. Sorry 'bout that.

Richard Hull
Progress may have been a good thing once, but it just went on too long. - Yogi Berra
Fusion is the energy of the future....and it always will be
Retired now...Doing only what I want and not what I should...every day is a saturday.

Andrew Haynes
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Re: air scram jet

Post by Andrew Haynes » Tue Sep 03, 2013 7:02 pm

Hi Richard Hall
:)
The 3000K is just to get plasma, if you have say 10 turns of wire around the chamber with 100kamp going through them It would compress the plasma. What would it be if you have 10Mtelsa. The z pinch operates by compressing.
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Rich Feldman
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Re: air scram jet

Post by Rich Feldman » Tue Sep 03, 2013 7:51 pm

Andy, we've long been wondering what planet you are on.
Let's presume that by 10Mtelsa [sic] you mean 10 megateslas. Sounds like neutron star territory.

Please give us some real dimensions for your 10 turns x 100 kA, so we can help you to compute the magnetic flux density.
I bet the result would be unremarkable in a high-field lab electromagnet or an amateur coin shrinker. I could get pretty close in my garage.

What rate of change of flux density (number, please) do you have in mind when you utter the buzzword z-pinch?

Bottom-line message: learn more Earth physics, and practice making your ideas quantitative.
All models are wrong; some models are useful. -- George Box

Andrew Haynes
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Re: air scram jet

Post by Andrew Haynes » Tue Sep 03, 2013 8:08 pm

Hi Rich Feldman

10 Turns
0.1 m length
0.25m3 radius
100,000amps
0.9 permeability
11.3 Tesla Yeah abit short :(

I was thinking 100hz to 10khz switching
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Re: air scram jet

Post by Ross Moffett » Tue Sep 03, 2013 8:15 pm

You won't get switching. I've wound coils for a coin shrinker before. I didn't make a mistake.. that's plural.. because that much amperage vaporizes the copper coils in the first cycle and you have to make a new coil for the next coin. If you thicken the cable, it will still get hot enough to melt in short order. Calculate the power dissipation by resistance (wire resistance tables by diameter easily available on the web).

P = R*I^2
(power in watts) = (resistance in ohms) * (current in amps squared)

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Re: air scram jet

Post by Richard Hull » Tue Sep 03, 2013 8:50 pm

If you use 1" copper buss bar in the coils it would not vaporize. What is a realistic duty cycle on this "fall-short system"..... One pulse a second? However, the compression realized wouldn't fuse much and if it should get a fusion or two, it is "putt-putt boat" operation. ( A form of worthless operation I have discussed many times, like trying to power a city off lightning and the abject, signal failure fully realized in the terawatt laser fusion failures at NIF recently). They have effectively admitted defeat and abandoned power fusion work at NIF and moved on to their main mission of making and testing better H bomb concepts. You will never "putt-putt boat" your way to real power fusion.

Richard Hull

For those too young to remember.............A small tin boat once sold in five and dime stores from the early 1900's until the demise of that type of store was called a putt-putt boat. In the boat was a little tin boiler tube heated by a candle or alcohol which flash boiled a slug of water, shooting it out a rear tube under the boat, propelling it forward. Once the tube reached an optimum temperature, the boat would putt-putt about the pond, pool or bathtub ocean provided by the child.
Progress may have been a good thing once, but it just went on too long. - Yogi Berra
Fusion is the energy of the future....and it always will be
Retired now...Doing only what I want and not what I should...every day is a saturday.

Andrew Haynes
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Re: air scram jet

Post by Andrew Haynes » Tue Sep 03, 2013 10:40 pm

Hi Ross Moffett
The wire would be large enough, spec out some 640mm2 AL wire that can handle 8kamp steady state about 0.02ohms/meter.

Hi Richard Hull
I'm work on a power system that might be capable of that current at 10khz, high voltage with a small cap, the induction of the coil will limit the current though.What telsa level would you need to achieve fusion, if the field was designed for almost round compression.

The 10MT was meant to be 10Mamp/turns/meter
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Ross Moffett
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Re: air scram jet

Post by Ross Moffett » Wed Sep 04, 2013 12:53 am

Just wanted to make sure you wouldnt wind this with 10 gauge. The next thing is that you won't be using a small capacitor. Look up maxwell low esr oil capacitors. Thats the sort of bank that will discharge 8kamps. Capacitors and batteries have internal resistance limiting the discharge current. Microwave caps are an acceptable substitute, for short runs, if you place a lot of them in parallel. After a while they fail.

Andrew Haynes
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Re: air scram jet

Post by Andrew Haynes » Wed Sep 04, 2013 1:59 am

Hi Ross Moffett
I was thinking about making my own, 1cm thick AL,1m3 with barium titante at 1cm spacing is about 1uF, I think it should reach 100kv, at low resistance it should put out the amps, but not over a long time.

Would 1uF be to small?

Might make some interesting plasma physics experiments.
Andrew Haynes

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