Friday, June 4, 2010

High Speed Compressor design using computational fluid dynamics

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

This kind of simulation needs quite powerful computer. As example the person who created this simulation has used a 32bit XP workstation with a dual core 3.2 GHz processor and 3 GB (using unofficial 3 GB windows switch) of RAM.

According to the comments of the youtube video this model has two problems.

1. This radial turbine is backwards dumping the fluid in the counter-clockwise direction and then it 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.
This  stator veins work because they redirect the air clockwise. Section-off this volute and flip this turbine.

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