TY - JOUR
T1 - Dynamic concentration measurement of micro/nano aluminum powder
AU - Fu, Shenghua
AU - Lou, Wenzhong
AU - Wang, Jingkui
AU - Ji, Tongan
AU - Li, Chubao
AU - Chen, Zhaohui
N1 - Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2021/3
Y1 - 2021/3
N2 - An appropriate concentration of micro/nano aluminum powder (MNAP) cloud is necessary for fuel air explosive (FAE) detonation. However, because of the fast dynamics, uncertainty interference, and transient characteristics of MNAP diffusion, experimental research on the measurement of MNAP cloud concentration is still lacking. Here, a pair of ultrasonic transducers were developed based on pulse drive, to measure the dynamic MNAP cloud concentration during MNAP diffusion in a standard 20-L explosion vessel. The measurement method was based on Lloyd-Berry ultrasonic attenuation theory. The experimental results showed that the ultrasonic pulse had a strong anti-interference ability, high precision, and real-time response to enable the characterization of MNAP diffusion concentration. The diffusion concentration gradients of MNAP were established and agreed well with the trend predicted by computational fluid dynamics simulations. The results also indicated that aluminum nanoparticles have better distribution characteristics than those of aluminum microparticles. These analyses provide technical support to improve FAE detonation energy.
AB - An appropriate concentration of micro/nano aluminum powder (MNAP) cloud is necessary for fuel air explosive (FAE) detonation. However, because of the fast dynamics, uncertainty interference, and transient characteristics of MNAP diffusion, experimental research on the measurement of MNAP cloud concentration is still lacking. Here, a pair of ultrasonic transducers were developed based on pulse drive, to measure the dynamic MNAP cloud concentration during MNAP diffusion in a standard 20-L explosion vessel. The measurement method was based on Lloyd-Berry ultrasonic attenuation theory. The experimental results showed that the ultrasonic pulse had a strong anti-interference ability, high precision, and real-time response to enable the characterization of MNAP diffusion concentration. The diffusion concentration gradients of MNAP were established and agreed well with the trend predicted by computational fluid dynamics simulations. The results also indicated that aluminum nanoparticles have better distribution characteristics than those of aluminum microparticles. These analyses provide technical support to improve FAE detonation energy.
KW - Concentration measurement
KW - Fuel air explosive (FAE)
KW - Micro/nano aluminum powder (MNAP)
KW - Ultrasonic attenuation
UR - http://www.scopus.com/inward/record.url?scp=85098140277&partnerID=8YFLogxK
U2 - 10.1016/j.powtec.2020.11.052
DO - 10.1016/j.powtec.2020.11.052
M3 - Article
AN - SCOPUS:85098140277
SN - 0032-5910
VL - 380
SP - 303
EP - 310
JO - Powder Technology
JF - Powder Technology
ER -