Microprojectile velocities in a gas driven launcher

Duval A.L., Page N.W. and Bremhorst K. (1995) Microprojectile velocities in a gas driven launcher. Experiments in Fluids, 19 5: 313-318. doi:10.1007/BF00203415


Author Duval A.L.
Page N.W.
Bremhorst K.
Title Microprojectile velocities in a gas driven launcher
Journal name Experiments in Fluids   Check publisher's open access policy
ISSN 0723-4864
Publication date 1995-01-01
Sub-type Article (original research)
DOI 10.1007/BF00203415
Volume 19
Issue 5
Start page 313
End page 318
Total pages 6
Publisher Springer-Verlag
Subject 2211 Mechanics of Materials
2210 Mechanical Engineering
2206 Computational Mechanics
1507 Transportation and Freight Services
Abstract Microprojectile methods of genetic engineering sometimes employ a macroprojectile which launches the microprojectiles when it hits a stopping plate. A study has been made of the relationship between the velocities of the macroprojectile and the microprojectile it launches. Macroprojectile velocities were measured using a beam blanking method and the microprojectile velocities were measured with a laser Doppler anemometer. Particles of tungsten, titanium dioxide and silicon carbide were investigated as microprojectiles. The microprojectile velocity was found to depend not only on the macroprojectile velocity but also on the microprojectile size and material, the bond strength with the macroprojectile and the gas flow that develops ahead of the macroprojectile. On average the microprojectile launch velocity was similar to the macroprojectile velocity. However, some tungsten particles had velocities twice this value. Experimental evidence suggests that these higher velocities were caused by early break-way of particles from the macroprojectile followed by further acceleration by aerodynamic drag arising from the gas flow ahead of the macroprojectile.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
 
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