Erosion of Gaseous Suspension Flow Duct due to Particle Collision, (I)

Abstract

An experimental study is presented on the erosion process caused on the target specimens by solid particle impingement, in which precise quantifications are given as to the dependencies on collision angle and collision velocity. In order to eliminate fluid-dynamic drag force that retards the particles' motion before they impinge upon the targets, the experiments are performed in the vacuum vessel. In the process of erosion, the existence of so-called incubation period is confirmed. Measured exponents of the velocity are considerably smaller than those for the handy application and are rather close to semi-theoretical values of Bitter and Finnie, which suggests that they can be used in the numerical prediction. Regarding the dependency on collision angle, it was found clear discrepancy between the experimental results and predicted one by means of models of Bitter and Finnie as the collision angle increased. For the spherical particles, the cutting erosion actually ceases before the collision angle becomes normal.

Comparison of ductile material erosion models combining cutting and deformation components of wear

“…Figure 1 presents the erosion curves produced by the studied models when fitted to the experimental data of Shimizu et al [19].…”

“…Figure 1 presents the erosion curves produced by the studied models when fitted to the experimental data of Shimizu et al [19].

Figure 1 Modelling results of the various erosion models when fit to experimental data from Shimizu et al [19] for three particle velocities (9.97, 17.3, and 23 m/s).

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“…In summary, seven erosion models were studied: All models were applied to experimental data from three investigations by Shimizu et al [19], Arabnejad et al [18], and Wong et al [20].…”

“…Table 3 presents the erosion rates extracted from graphs provided by Shimizu et al [19]; these values are approximations obtained with reference to the graph axes because the data used in the graphs was not available in tabular form. The same procedure was repeated to extract data from Refs.…”

“…; velocity: 80 m/s. Modelling results of the various erosion models when fit to experimental data from Shimizu et al[19] for three particle…”