TY - JOUR
T1 - Discussion: “Rotordynamic Force Prediction of Centrifugal Compressor Impellers Using Computational Fluid Mechanics” by J. J. Moore, D. L. Ransom, and F. Viana
PB - ASME
AU - Childs, Dara
Y1 - 2010/11/23
N1 - 10.1115/1.2904894
JO - Journal of Engineering for Gas Turbines and Power
SP - 045501
EP - 045501-1
VL - 133
IS - 4
N2 -
The authors are to be commended for an interesting demonstration of computational fluid dynamics (CFD) methods in the analysis of rotordynamic forces for impellers in centrifugal compressors. CFD approaches clearly represent the future for this important calculation. As they state, data are vitally needed to anchor predictions for impeller coefficients for compressors. In fact, better data would also be helpful for pump impellers. The data of Bolleter et al. [4] yield whirl frequency ratios that range upward from 0.75 to 2.2. To the extent that the destabilizing forces arise from fluid rotation, WFR cannot exceed the average circumferential velocity ratio, and more reasonable values would be on the order of 0.5 (as predicted by the authors).
SN - 0742-4795
M3 - doi: 10.1115/1.2904894
UR - http://dx.doi.org/10.1115/1.2904894
ER -