Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Numerical investigation of a new pipe wall design to reduce elbow erosion
Submission Author:
Carlos Duarte , MG , Brazil
Co-Authors:
Carlos Duarte, Francisco Souza
Presenter: Carlos Duarte
doi://10.26678/ABCM.COBEM2017.COB17-0294
Abstract
Pneumatically conveyed particles are commonly responsible for triggering the erosion process by impacts on the wall. Those impacts result from the fluid-particle interaction and understanding their mechanisms is the key to mitigate the erosion damage in engineering applications. In this paper, a novel pipe wall design is proposed in order to reduce the erosion on a 90º elbow. This design consists of twisting a pipe wall along the flow streamwise direction. Basically, such configuration generates a swirling flow upstream of the elbow and consequently re-disperses the transported particles, preventing them from focusing on a single point at the elbow. An accurate CFD model based on the Euler-Lagrange approach is used for evaluating the erosion depth. Experimental data on a standard pipe elbow is employed for validating the numerical results. Further, simulations are run for the new pipe geometry. In general, the changes in the two-phase flow brought about by the twisted pipe wall are effective for reducing elbow erosion. The simulations show that a reduction of erosion peak up to 33% can be achieved in a pipeline equipped with the twisted pipe wall in comparison to the baseline configuration.
Keywords
New pipe wall design, CFD, Solid particle erosion modeling, Erosion reduction, Air-sand erosion
