Design, fabrication and characterization of a Tesla pump
DOI:
https://doi.org/10.11606/issn.2526-8260.mecatrone.2018.143554Keywords:
Centrifugal pump, Fluid dynamics (Simulation), Finite element method, Topology methods (Optimization)Abstract
Tesla devices consist of rotating disks (without blades), whose operation is based on the boundary layer effect (i.e., viscous friction forces acting on the fluid and Coandă effect). According to this working principle, the flow becomes continuous and nonpulsatile. The objective of this project is to design, fabricate and characterize a Tesla pump aiming to improve its efficiency and power. The Tesla pump has various applications, but the efficiency of its operation is quite low, which makes room for the optimization of its design. This project is based on the optimization of the rotor and the volute of a Tesla pump operating with a newtonian fluid in laminar flow. The operation of the Tesla pump is simulated by using the Finite Element Method in the FEniCS platform and validated with the software ANSYSR© CFX. The topology optimization is implemented in the FEniCS platform by using the dolfin-adjoint library for sensitivity (derivative) calculation and the IPOPT algorithm for optimization. Two prototypes are fabricated and characterized experimentally, consisting of a Tesla pump composed of CDs (polycarbonate discs used as digital data storage) as the rotor disks; and a prototype designed by the topology optimization method (fabricated by additive manufacturing).Downloads
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