Ultrafine particle generation by high-velocity impact of metal projectiles

18th APS-SCCM; 24th AIRAPT

Stabile, L.^1 ; Iannitti, G.^2 ; Vigo, P.^1,3 ; Ruggiero, A.^1,2 ; Russi, A.^1 ; Buonanno, G.^1

University of Cassino and Southern Lazio, Cassino

I-03043, Italy^1

Techdyn Engineering, Rome

I-00199, Italy^2

PaLMer, Ferentino, Italy^3

关键词: Combustion sources;    Experimental campaign;    High-velocity impact;    Mechanical process;    Particle concentrations;    Particle generation;    Ultrafine particle;    Unimodal distribution;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/500/18/182018/pdf
DOI  :  10.1088/1742-6596/500/18/182018

来源: IOP

【 摘 要 】

Ultrafine particle generation through mechanical processes was not carefully deepened so far, even if it could be related to the human health-based researches. In particular, the evaluation of ultrafine particles produced in battlefield scenarios can be useful to quantify the exposure of soldiers to particles carrying toxic heavy metals. In the present work ultrafine particle generation during high-velocity impact of metal projectiles was deepened performing symmetrical high velocity Taylor impacts of copper cylinder tests (Rod-on-Rod tests) by means of a gas-gun facility. Particle number distributions and total concentrations were measured through one-second-time resolution instruments in a chamber where impact events at different velocities were performed. Particle number generation per impact was also evaluated. Particle concentrations in the 106part. cm-3range were measured corresponding to particle generations higher than 1012particles per impact, then comparable to those typical of combustion sources. Particle number distribution showed a unimodal distribution with a 10 nm mode. Summarizing, the performed experimental campaign revealed an extremely high generation of ultrafine particles from mechanical processes.