2007 Volume 15 Issue 2 Pages 73-79
The previous report described a stability study in which a flow rate v. pressure ratio curve obtained from simulation was used as an evaluation index. As a result of iterative optimization a large gain was obtained from a series of smaller gains. Study of the parameter design results at each iteration also clarified such issues as level ranges and system selection. Reproducibility was obtained by resolving these issues, leading to a compressor with a higher pressure ratio and higher efficiency. Further improvements on the basis of this index, however,turned out to be difficult, and there were also tuning problems. An iterative optimization was therefore performed using the input-output energy relationship in the basic function as the evaluation index. This led to higher gain, and the tuning problem was solved through parallel use of the results of the flow rate v. pressure ratio curve. Through these studies we established a method of applying quality engineering to the design of centrifugal compressors, which we report here.
