@article{oai:ir.kagoshima-u.ac.jp:00008080,
 author = {片野田, 洋 and Katanoda, Hiroshi},
 issue = {2},
 journal = {溶射},
 month = {Feb},
 note = {This paper investigates the physical reasons of why the particle is more accelerated in the cold spray nozzle when helium
gas is used as a process gas compared to nitrogen gas， by using one-dimensional calculation. In addition， the deceleration
mechanism of the particle between a plate shock wave and a substrate is also investigated. The selected particle in the
calculation is spherical Cu with the diameters of 5 and 15μm. The calculated results reveal that 1) the particle injected into
the helium gas flow has a larger velocity just upstream of the plate shock wave because a larger drag force keeps acting on
the particle from the injection port to the plate shock wave. The larger drag force is due to a larger drag coefficient just
downstream of the injection port, followed by a larger squared relative velocity of the particle in the downstream region，2 )
the particle accelerated by the helium gas is less decelerated between the plate shock wave and the substrate because the
squared relative velocity of the particle is decreased to less than 1/10 by passing through the plate shock wave for the helium
gas case.},
 pages = {52--58},
 title = {コールドスプレーにおけるヘリウムガスの効果 : 粒子のノズル内における加速とプレート衝撃波による減速},
 volume = {48},
 year = {2011},
 yomi = {カタノダ, ヒロシ}
}