Characterization of spray atomization of 3003 aluminum alloy during linear spray atomization and deposition
- Univ. of California, Irvine, CA (United States)
- Aluminum Co. of America, Alcoa Center, PA (United States). Fluid State Process Design Center
Linear spray atomization and deposition is an attractive technique to produce near-net-shape deposits, such as aluminum sheet and strip. In the present study, phase Doppler interferometry (PDI) was used in a backscatter mode to characterize, in situ, the droplet size and velocity distributions during linear spray atomization and deposition of a 3003 aluminum alloy. The PDI measurements were obtained along axes corresponding to the direction parallel to the nozzle slit and to the direction perpendicular to the slit. The PDI results delineate the temporal and spatial distribution of the droplet size and velocity during the metal spray. Both point and line measurements were obtained and are reported. The line measurements resulted from the integration of measurement made along a line scan obtained in real time (i.e,, not ensemble averaged). Postrun analysis of the droplet size distribution using laser diffraction and sieving techniques is also reported. The PDI point measurements revealed that droplet size and velocity distribution were relatively invariant with time. The line measurements of droplet velocity showed that the droplet axial velocity exhibits a bimodal behavior, which becomes more apparent with increasing atomizing gas pressure, a result of droplet recirculation inside the spray chamber. Postrun characterization of the droplet size distribution of the entire metal spray using diffraction and sieving methods indicated that the mass (volume) median diameter D{sub 50} and the Sauter mean diameter (SMD) D{sub 32} decreased with increasing gas pressure in a manner consistent with PDI results.
- Sponsoring Organization:
- USDOE, Washington, DC (United States); National Science Foundation, Washington, DC (United States)
- DOE Contract Number:
- FC07-94ID13238
- OSTI ID:
- 651074
- Journal Information:
- Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science, Journal Name: Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science Journal Issue: 4 Vol. 29; ISSN MTBSEO
- Country of Publication:
- United States
- Language:
- English
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