HIF 2010
18th International Symposium
on Heavy Ion Inertial Fusion -
Information

Title:	Mr.
Family Name:	Takahashi
First Name:	Kazumasa
E-Mail:	takahashi.k.axm.titech.ac.jp
Affiliation for Badge:	Tokyo Institute of Technology
Institute:
Address (Street):	4259 G3-32, Nagatsuta, Midori-ku
Postal Code, City:	226-8502, Yokohama
Country:	Japan
Phone:	+81-45-924-5665
Fax:	+81-45-924-5575
Payment:	Cash at the conference site
Author(s):	Kazumasa Takahashi, Yujin Oogata, Mitsuo Nakajima, Kazuhiko Horioka
Institute(s):	Department of Energy Sciences, Tokyo Institute of Technology
Title:	Cluster Formation in Hypersonic Miniature Nozzle
Abstract:	We investigated nonequilibrium condensation process during rapid expansion in hypersonic miniature nozzle (diameter at nozzle exit ~ 3 mm) for characterization of the quantity, and size distribution of cluters as a function of P0, T0, and nozzle geometries for high flux cluster beams. Effects of stagnation pressure P0 and nozzle geometries on the flow propaties and the cluster formation are discussed. The stagnation temperature was fixed at T0 ~ 293K and pressure P0 was varied from 5 to 30 atm. The boundary layers were considered by comparing helium flow results with those of argon, together with basic relation of viscosity coefficients. The flow property and condensation process were estimated from static pressure measurements on the wall at the nozzle exit. The experimental data were compared with a numerical calculation based on nucleation and drop-growth model and we estimated the formation process of clusters. We also investigated relation between the flow properties and the nozzle geometries.
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