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by Mike Everman
Mon Nov 24, 2003 1:24 pm
Forum: Valveless pulsejet forum
Topic: Jam Jar Turbine
Replies: 15
Views: 18110

but I'm starting to think that you could allow air in more toward the hub, and the exhaust farther out and more tangentially. Centripetal accelerations bring an interesting twist I wish we had on the engines we're talking about. Imagine if our VPJ's had a strong apparent axial acceleration to bias ...
by Mike Everman
Mon Nov 24, 2003 4:05 am
Forum: Valveless pulsejet forum
Topic: r.b pelteire.question
Replies: 53
Views: 58515

LMGM wrote:...have workig pulse detonation chambers.and all of them work fine...
I for one would like to hear about your PDE chambers, fuel type, ignition, configuration; anything you feel like sharing...
by Mike Everman
Mon Nov 24, 2003 12:44 am
Forum: Valveless pulsejet forum
Topic: Jam Jar Turbine
Replies: 15
Views: 18110

The whirls are going to get smashed flat by centripetal force, so maybe in this case they should be encouraged to form parallel to the plane of the fuel surface... Isn't the "eye" of these whirls the highest compression state, being the lowest velocity? And in the second diagram, what happens in the...
by Mike Everman
Sun Nov 23, 2003 11:51 pm
Forum: Valveless pulsejet forum
Topic: Jam Jar Turbine
Replies: 15
Views: 18110

So what other details are part of the design? Why have three or four exit tubes along the inner rim? Why not have ten to twenty smaller tubes along the upper side of the rim bending so that they exhaust straight back? But I guess what you have there now kind of reminds me of a Harrier's vectored ex...
by Mike Everman
Sun Nov 23, 2003 7:11 pm
Forum: Tools and Construction
Topic: Fluidic Circuits for use in BCVP?
Replies: 2
Views: 4452

How would this improve on placing a turbulator in the region where you want to encourage flow separation?

cudabean
I have no clue what end to put the damn thing on, I just feel it could switch a rather large flow for something!
by Mike Everman
Sun Nov 23, 2003 7:00 pm
Forum: Valveless pulsejet forum
Topic: Jam Jar Turbine
Replies: 15
Views: 18110

I've got little jamjar theory under my belt, but I am proposing that centrifugal pressure increase is the goal. I like the pool of boiling fuel concept. Makes delivery a non-issue. the model is cut away depicting it in spun up mode, so fuel is perfectly destributed about the rim.
by Mike Everman
Sun Nov 23, 2003 11:21 am
Forum: Valveless pulsejet forum
Topic: Jam Jar Turbine
Replies: 15
Views: 18110

It's a "to heck with efficiency" may be a nice demo, maybe a spinning top for fun.
by Mike Everman
Sat Nov 22, 2003 7:16 pm
Forum: Tools and Construction
Topic: Sintering, porosity & combustion synthesis
Replies: 20
Views: 21159

Makes a good case for many fuel orifices at reduced pressure. Hey, Bruno, check out two things for me, OK? The jamjar turbine in valveless thread and the fluidic oscillator circuit in tools and construction. I'm firing on all cylinders right now, with no resposibilities but to rest my back. I want t...
by Mike Everman
Sat Nov 22, 2003 6:42 pm
Forum: Tools and Construction
Topic: Sintering, porosity & combustion synthesis
Replies: 20
Views: 21159

If you have continous flow at the intakes, doesn't fuel get blasted out the intake every cycle, or does it suck it all back in?
by Mike Everman
Sat Nov 22, 2003 6:40 pm
Forum: Tools and Construction
Topic: Fluidic Circuits for use in BCVP?
Replies: 2
Views: 4452

Fluidic Circuits for use in BCVP?

May be an old idea, but I'm trying to massage this concept into an engine...
by Mike Everman
Sat Nov 22, 2003 4:21 pm
Forum: Valveless pulsejet forum
Topic: Jam Jar Turbine
Replies: 15
Views: 18110

Jam Jar Turbine

Something for Bruno's over-rated originality file! I don't know whether this will work or not, or if it's missing something; whether it's been thought of or would any efficiency whatsoever. I suspect a certain pipe length would dictate only one working rpm, so you may have to have a variable pitch p...
by Mike Everman
Sat Nov 22, 2003 3:04 pm
Forum: Tools and Construction
Topic: Hydroforming
Replies: 21
Views: 23640

So, who cares about originality? Bruno, there is very little chance of originality without a great deal of research into what's been done before. Sure, we now have tools and materials that can reduce the necessity of a great deal of experimentation, but if you are going make a goal out of a very lo...
by Mike Everman
Sat Nov 22, 2003 11:12 am
Forum: Tools and Construction
Topic: Sintering, porosity & combustion synthesis
Replies: 20
Views: 21159

bruno wrote:Mike, if you can be educated by us, boy, you're in trouble...
Cute, but am I on the right track with these fueling opinions?
by Mike Everman
Sat Nov 22, 2003 11:10 am
Forum: Tools and Construction
Topic: Hydroforming
Replies: 21
Views: 23640

Ha Ha Ha! that poster has been on my wall for years. If it is too "easy" to imagine, it may have already been tried. That goes for anyone who thinks they have arrived there first. Remember, many lovely shapes have been fondled. Mark I rankle a bit on the whole notion that everything has been invente...
by Mike Everman
Fri Nov 21, 2003 3:13 pm
Forum: Valveless pulsejet forum
Topic: Catastrophic failure
Replies: 31
Views: 36772

Yeah, and the pretty common 6Al4V is is a nice workable high temp grade with something like 5-6 ppm/degF. Beautiful but relatively expensive stuff.