A droplet generator has been designed and built to make wax and tin alloy droplets for freeform fabrication. The linear stability theory of liquid jets for forming droplets is first reviewed. The analytical formula for predicting droplet size and breakup length at optimal conditions are then developed. The suitability of the formulas to be used for the present droplet deposition system is studied by comparing its prediction with the more accurate numerical results and previously published experimental data. Only the suitable formulation is adopted for the design and operation of the droplet generator system. Experiments have been conducted at a wide range of operating conditions including different nozzle sizes, jet velocities, and frequencies. Good agreements are found between the predictions based on the adopted analytical formulation and the experimental results. It has been found that using the present design and procedure recommended, the droplet sizes can be controlled having a size deviation of less than 3 percent and the shape variation of the deposited layer can be managed within 3 percent of its deposited width.
Design and Operation of a Droplet Deposition System for Freeform Fabrication of Metal Parts
Contributed by the Materials Division for publication in the JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY. Manuscript received by the Materials Division May 5, 1999; revised manuscript received November 23, 1999, Associate Technical Editor: A. M. Rajendran.
- Views Icon Views
- Share Icon Share
- Cite Icon Cite
- Search Site
Tseng, A. A., Lee , M. H., and Zhao, B. (November 23, 1999). "Design and Operation of a Droplet Deposition System for Freeform Fabrication of Metal Parts ." ASME. J. Eng. Mater. Technol. January 2001; 123(1): 74–84. https://doi.org/10.1115/1.1286187
Download citation file:
- Ris (Zotero)
- Reference Manager