高圧空気を用いた船舶用推進装置の計算モデル : 一次元非線形格子モデルの特性と実験結果との比較

概要

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The purpose of this study is to investigate a new type of nozzle which generates a high-speed two-phase water jet as a propulsion device for a ship. In order to examine the characteristics of the flow in the nozzle analytically, a one-dimensional nonlinear lattice model is applied to the flow systems for various nozzles such as an axially symmetrical nozzle and a two-dimensional nozzle. Because of air injection, the propagation of compression and expansion waves is induced in these nozzles. The jet velocities of Model 1 # (straight nozzle) increase as compared with those of Model 2 # (divergent nozzle). The thrusts of Model 3 # (two-dimensional nozzle without bottom) increase as compared with those of Model 2 # (two-dimensional nozzle with bottom). Analytical results of these models qualitatively agree with those obtained by experimental results. Consequently, the proposed models are effective to investigate the characteristics of the flow in these nozzles.
社団法人日本機械学会の論文
1994-10-25