www.pulse-jets.com

Mike Everman wrote: ↑

Tue Jan 14, 2020 8:43 pm

Nice!

Thank you Mike.

This is my video how to video on rotating type marble stirling engine. I have explained step by step how to build a stirling engine out of very simple materials but effective running. Materials used: 1. Testtube- Displacer cylinder 2. Marbles - Displacer piston 3. Glass syringe- Power piston 4. Prop...

Hi Zono and Ganesh, I'd like very much to know if this motor's intake and exhaust alternate. I'm about to put it to a turbine and in or out of phase is important. Any interest in running this geometry? I'm imagining test rigs to find out, but thought you guys would enjoy the idea. pocket jet, 3.5 l...

Straight or bent design anything is ok for me.

Hi Mike

That's interesting. If you could share me the geometry file,it will be easy for me to proceed with simulation.

I would require the following details from your side:
1. Fuel type
2. Injector location and size
3. CAD file in x_t,x_b,step or iges format

Thank you

Regards
Ganesh

Hi Zono'

Thank you very much.

I am beginner in OpenFOAM, have just done flow past cylinder case . It will be very interesting to see these kind of simulations in OpenFOAM, eagerly waiting for your results. All the best.

Regards
Ganesh

Got some updates on the code creation, 1. 2d RANS successfully done in MATLAB. STill not yet reached to combustion coding. 2. Created a basic GUI for users to enter values and visualize answers. As of now I have written 1d, 2d inviscid and laminar flow in explicit form. Trying to build code for impl...

Hey Ganesh, how is the project going? Hi Mike Got some updates, In my previous post you can see some colourful images it seems the Lax-Friedrich scheme is too dissipative. So now I have changed the scheme to Maccormack scheme (predictor-Corrector method), the results seems to be reasonable. I have ...

Hi all, Recently I have been thinking to write a CFD code specifically to simulate pulsejet engines. I started the work two weeks ago and now I have reached a starting point with fully compressible coupled Navier Stokes equation (2D and 3D analysis). Currently tweaking some of the things to match ou...

Another just for fun numerical simulation. This was fun creating.
https://youtu.be/VdnT-rudMb8

A just for fun simulation.

Video link:
https://youtu.be/AlN7lFJ826o

Another valveless type numerical simulation but this time its single intake chinese type. Its really interesting to see the things happening inside the PJ.

https://youtu.be/FgFmT-_KZfA

Actually there will be a velocity motion in opposite direction during suction phase from exhaust and intake side but velocity does not show in negative value (i.e positive velocity in reverse direction). In this video the motion of colours represents the movement of mass either in froward or reverse...

Oh, that one is fun to watch! I would love to see the pressure animation as well. Does it not make sense that the velocity scale should be -300 to +300m/sec? Loses that "hot-cold" spectrum, but freezing it would allow some better interpretation. Will surely post the pressure plots in my next simula...

Numerical simulation of valveless thermojet in commercially available software.

Combustion chamber pressure: 1.3bar
Peak temp: 2200K
Thrust: 4.2pounds approx 1.95kg

Video: https://youtu.be/1l-MQX_ozCk