High Speed Compressor design CFD

CFD used to run multiple iterations of volute design on 15000 RPM high output air compressor using CFdesign. Design comparison was key - showed better designs in a few days without prototypes.

Category:

Howto & Style

Tags:

• FSAE
• CFD
• compressible
• turbine
• analysis
• CFdesign
• Upfront
• engineering
• mechanical
• compressor
• research
• consulting

[djillali8722]

you need 32Go of RAM (DDR 3) + 3.2 Ghz of processor (quad) to keep working the animation with flurent

[Particletrace]

OUCH! This was cfdesign. I only used a 32bit XP workstation with a dual core 3.2 GHz processor and 3 GB (using unofficial 3 GB windows switch) of RAM. standard stuff.

[gearhead364]

I noticed that you incorporated stator vanes into the design in order create a more uniform flow through the scoll/volute, but why did you not take the next step an incorporate diffuser vanes (wedge or cambered) to further increase the total to static pressure ratio?

[mihir1310]

Openfoam. But it requires a Linux platform .

[vochitoken]

is COMSOL any good for this types of simulations?

[camelon]

i was watched that gus presentation one of SpaceClaim webinar but bro your sound so weird soo sory but this is real...

[vangro1]

Cohiba,

The compressor wheel is spinning in the proper direction. See Peng's "Fundamentals of Turbomachiner".

[vangro1]

@CohibaSkeeza

The compressor wheel is spinning in the CORRECT direction in this simulation. The compressor direction should match the direction of the volute to conserve momentum.

As whotookmynickkokoal mentions, the key to improving this design is to reduce the housing size, especially to force the fluid to travel in the volute's direction.

See Peng's "Fundamentals of Turbomachinery" for more info.

[whotookmynickkokokai]

Good observation. How will it be a better design? Do you think the design need to have a smaller housing(radial boundary) near the turbine?

[sjh7132]

If you assume the intake is at the top then it would be spinning clockwise.

[CohibaSkeeza]

If you want to leave your compressor you need to take the corner of the volute to eliminate separation.

[CohibaSkeeza]

Dude, this desing has two major problems:

1. Your radial turbine is backwards dumping the fluid in the counter-clockwise direction and then you want it to travel in a clock-wise direction - the air is being pushed in the wrong direction

2.The fluid is turning that huge corner and you have separation. The fast moving fluid is due to all the back-pressure rather than steady flow.

Your stator veins work because they redirect the air clockwise. Section-off your volute and flip your turbine.

[PNCA1984]

for a compressor or pump simulation is not necesary ALE formulation??