There is, I think, something ethereal about i —the square root of minus one. I remember first hearing about it at school. It seemed an odd beast at that time—an intruder hovering on the edge of reality.

Usually familiarity dulls this sense of the bizarre, but in the case of i it was the reverse: over the years the sense of its surreal nature intensified. It seemed that it was impossible to write mathematics that described the real world in …

I and i

[신간의 별자리x] 우리/미술, 그리고 ‘슬픔의 박물관’

On centrifugal pumps

https://dr.ntu.edu.sg/bitstream/10356/84717/1/Optimal%20design%20of%20multistage%20centrifugal%20pump%20based%20on%20the%20combined%20energy%20loss%20model.pdf

Optimal design of multistage centrifugal pump based on the combined energy loss model and computational fluid dynamics

Review and implementation of CFD-DEM applied to chemical process systems

Energy characteristics of mixed-flow pump under different tip clearances based on entropy production analysis

Mechanism and propagation characteristics of rotating stall in a mixed-flow pump

In order to improve the hydrodynamic performance of the centrifugal pump, an orthogonal experiment was carried out to optimize the impeller design parameters. This study employs the commercial computational fluid dynamics (CFD) code to solve the Navier-Stokes equations for three-dimensional steady flow and predict the pump performance. The prototype experimental test results of the original pump were acquired and compared with the data predicted from the numerical simulation, which presents a good agreement under all operating conditions. Five main impeller geometric parameters were chosen as the research factors. According to the orthogonal table, 16 impellers were designed and modeled. Then, the 16 impellers equipped with the same volute were simulated by the same numerical methods. Through the variance analysis method, the best parameter combination for higher efficiency was captured finally. Compared with the original pump, the pump efficiency and head of optimal pump have a significant improvement.

https://journals.sagepub.com/doi/pdf/10.1155/2013/385809

Weidong Shi

Papers

Optimal design of multistage centrifugal pump based on the combined energy loss model and computational fluid dynamics

Energy characteristics of mixed-flow pump under different tip clearances based on entropy production analysis

Mechanism and propagation characteristics of rotating stall in a mixed-flow pump

Performance Optimization in a Centrifugal Pump Impeller by Orthogonal Experiment and Numerical Simulation

Interstage difference of pressure pulsation in a three-stage electrical submersible pump