Shock Wave Propagation Into a Dust-Gas Suspension Inside a Double-Bend Conduit
Author:
Igra O.1, Wu X.1, Hu G. Q.1, Falcovitz J.2
Affiliation:
1. The Pearlstone Center for Aeronautical Studies, Department of Mechanical Engineering, Ben Gurion University of the Negev, Beer Sheva, Israel 2. Institute of Mathematics, The Hebrew University, Jerusalem, Israel
Abstract
Using conduits in which a transmitted shock wave experiences abrupt changes in its direction of propagation is an effective means for shock wave attenuation. An additional attenuation of the transmitted shock wave is obtained when the medium contained inside the conduit (through which the shock wave is transmitted) is a suspension rather than a pure gas. The present numerical study shows that adding small solid particles (dust) into the gaseous phase results in sharp attenuation of all shock waves passing through the conduit. It is shown that the smaller the dust particles diameter is, the higher the shock attenuation becomes. Increasing the dust mass loading in the suspension also causes a quick attenuation. By proper choice of dust mass loading in the suspension, or the particles diameter, it is possible to ensure that the emerging wave from the conduit exit channel is a (smooth) compression wave, rather than a shock wave.
Publisher
ASME International
Subject
Mechanical Engineering
Reference14 articles.
1. Igra, O., Wu, X., Falcovitz, J., Meguro, T., Takayama, K., and Heilig, W., 2001, “Experimental and Theoretical Study of Shock Wave Propagation Through Ducts With Abrupt Changes in the Flow Direction,” J. Fluid Mech., 437, pp. 255–282. 2. Falcovitz, J., and Igra, O., 2000, “Shock Wave Structure in Dusty Gas Suspension,” The 14th Mach Reflection Symposium, Sendai, Japan. 3. Igra, O., and Ben-Dor, G., 1988, “Dusty Shock Waves,” Appl. Mech. Rev., 41, pp. 379–437. 4. Rudinger, G., and Chang, A., 1964, “Analysis of Nonsteady Two-Phase Flow,” Phys. Fluids, 7, pp. 658–663. 5. Miura, H., and Glass, I. I., 1983, “On the Passage of a Shock Wave Through a Dusty-Gas Layer,” Proc. R. Soc. London, Ser. A, A385, pp. 85–105.
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