Investigation of Aerosol Penetration Through Individual Protective Equipment in Elevated Wind Conditions

Figures & data

Figure 1 FIG. 1 Approach to modeling the component test: the sleeve is modeled as a rigid permeable cylinder, with a solid inner cylinder representing an appendage.

Figure 2 FIG. 2 Illustration of the potential flow model, adapted from Li et al. (2001).

Figure 3 FIG. 3 Pressure drop across fabric predicted by potential flow and the numerical model plotted at four different free stream velocity values.

Figure 4 FIG. 4 Schematic diagram of the bench-top test setup used for fabric penetration measurements as a function of particle size and face velocity.

Figure 5 FIG. 5 Swatch test setup in wind tunnel. The wind-tunnel test section is 4 feet wide and 3 feet tall.

Figure 6 FIG. 6 Component test setup. The wind-tunnel injection and sampling system are identical to that of the swatch holder setup.

Figure 7 FIG. 7 Component holder with fabric support screen and additional sleeve covering the stand at the bottom, and full component test with sleeve. (Color figure available online.)

Figure 8 FIG. 8 Pressure drop measurements at θ = 0 compared to the potential flow model.

Figure 9 FIG. 9 Penetrations obtained from bench-top measurements for four different face velocities. The error bars represent the range of penetration values for five different fabric pieces. Measurement errors were similar for all face velocity cases and are only shown for the 6.5 cm s^-1 case. These experimental results were used to determine the variables B₁–B₄ in Equation (4)(4) . The predictions of the penetration model using the variables B₁–B₄ are shown.

Figure 10 FIG. 10 Contribution of filtration mechanisms for 6.5 cm s⁻¹ face velocity.

Figure 11 FIG. 11 Contribution of filtration mechanisms for 27 cm s⁻¹ face velocity.

Figure 12 FIG. 12 Wind-tunnel swatch test results for two different free stream velocities (30 and 60 ft/s) plotted with bench-top data of equivalent face velocity (27 cm s⁻¹; based on the sample flow through the swatch).

Figure 13 FIG. 13 Component penetration predicted by the model. The error bars represent the standard deviation of penetration results with three different sleeve samples. Measurement uncertainties were similar for all velocity cases and are only shown for one test case (60 ft/s).

LiL.LiuJ.ChengD.200162559562

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