http://jultika.oulu.fi/files/nbnfi-fe2018062726516.pdf

Slurry erosion of steel – Review of tests, mechanisms and materials

Effect of impact angle and velocity on erosion of API X42 pipeline steel under high abrasive feed rate

This paper discusses the application of proper orthogonal decomposition (POD) to the particle image velocimetry (PIV) velocity fields of the recirculation zone of an annular jet. The annular jet is an example of complex shear flow situations. Two axisymmetrical shear layers, originating at the exit of the jet, one at the lip of the nozzle and the other in the centre of the body, eventually meet downstream or interact with each other. In this study we propose use of the POD on PIV velocity fields of the recirculation zone of this annular jet. According to POD analysis, the primary objective of this paper is to describe the mode effects on the understanding of the nature of the flow and especially the link between the first eigenfunctions of POD and the motion of the stagnation point at the extremity of the recirculation zone of the annular jet. In particular, this allows us to dissociate the oscillation and velocity fluctuations due to the turbulent flow behaviour.

https://iopscience.iop.org/article/10.1088/0957-0233/12/9/305/pdf

Flow analysis of an annular jet by particle image velocimetry and proper orthogonal decomposition

The Dynamics And Thermodynamics Of Compressible Fluid Flow

Effect of impact angle and testing time on erosion of stainless steel at higher velocities

An experimental investigation of the near-field region of free turbulent round central and annular jets

A coating weight model was developed to describe the pressure and wall shear stress distributions as functions of slot gap (d) and impingement distance (Z), for the air knife wiping of the liquid zinc coatings in continuous hot dip galvanizing at ratios of Z/d ≤ 8. This model was then used in validation studies in order to predict the coating weight as a function of the process parameters. The model was based on improved correlations for pressure and shear stress developed by a combination of experimental and computation techniques, which has resulted in more accurate predictions of coating weight validated using industrial coil average coating weight data, particularly for coating weights of up to 75 g/m2. For this region, the maximum deviation between the predicted and measured coating weights was 8 pct. The coating weight model was further developed by incorporating a lumped heat-transfer analysis to predict the solidification “dry line” of the coating. For a typical continuous galvanizing process, the model predicts an 80 pct coating solid fraction for a coating weight of 130 g/m2 to occur at 15 m from the air knives, which agrees qualitatively with visual observations in continuous galvanizing lines.

Ehab Elsaadawy

Papers

An experimental investigation of the near-field region of free turbulent round central and annular jets

Coating Weight Model for the Continuous Hot-Dip Galvanizing Process

The solid particle erosion of 12 metals using magnetite erodent

An experimental investigation of the near-field region of a free turbulent coaxial jet using LDA

Influence of the magnitude of the two initial velocities on the flow field of a coaxial turbulent jet