CFD Simulation of Two-Stroke Engine Scavenging

This is an animation of the scavenging process of a small two-stroke engine. The simulation was carried out with 3d cfd software.

Category:

Autos & Vehicles

Tags:

• CFD
• two
• stroke
• engine
• scavenging
• zweitaktmotor

[k0ent]

is a boost port included with this?

[Hellbier]

@k0ent

This is a cylinder for a small handheld power tool, so no boost port.

[vikkiandbradley07]

looks good, shame it dosnt show a full cycle

[k0ent]

@Hellbier

ok, verry nice simulation by the way! looks realy cool

[NikosSTD]

My diploma thesis is based on the use of a CFD program called KIVA. I dont know weather you know it or not, but i believe, that KIVA along with ENSIGHT (opictal reproduction of results) would give a much better video quality! Nevertheless, CFD keeps "rocking my world" and I must underline the fact that your job is still great! Keep it up, greetings from Greece!!!

[JETZcorp]

Well, the fuel is stuffed back into the cylinder if the engine happens to be at the right RPM for the pipe. If the RPM is wrong, then the pulse will try go stuff exhaust back in. If it's too high, it'll try to stuff the fuel back in but only manage to ram it against the piston. That's my understanding, at least.

[newbonne]

Burning fuel is blue. As the piston approaches the exhaust port, the piston uncovers the transfer ports and fresh fuel(red) swirls up and around the cylinder and across the head and sweeps the burned fuel mixture out the exhaust port. What is not seen is that some of the fresh fuel mixture leaves along with the burned fuel mixture, but a returning pressure pulse from the expansion chamber stuffs this back into the cylinder before the piston closes the exhaust port.

[mickeymoose76]

Its not very clear, these no detail or actual form to the blobs of colour, and er jepson, shut up you smarmy dick!

[medfexer]

The Schnurle scavenge principle. It revolutionized the two stroke engine.

[Jepsion]

well thats your fault, not the video´s.. i understand it 100%