Centrifugal pumps and compressors are both rotating equipment devices. Each is a machine that imparts kinetic energy to the fluid to create pressure and move liquids, gases, and other process materials. So what are the differences between pumps and compressors? The main differences are intimately connected with the properties of the process fluid medium being […]
Notes on NPSH Testing
In pump literature, much has been written and continues to be written about NPSH (Net Positive Suction Head) and cavitation. As career pump engineer, I will share some of my knowledge and experience on pump NPSH testing, particularly a few practical matters that may not be covered in the extensive literature on this subject. Terminology […]
Hydrodynamics of Pumps (2011 edition) – A Book Review
Hydrodynamics of Pumps by Christopher E. Brennen was first published in 1994. Aside from my long-time professional acquaintance with the author, what caught my attention in this book are the various technical passages related to rocket propulsion turbomachines, including the Space Shuttle Main Engine. Over the years I would hear about the technical issues with these […]