Open AccessПространственные эффекты при взаимодействии ударной волны с продольным каналом газа пониженной плотности
Author(s) -
П.Ю. Георгиевский,
В.А. Левин,
О.Г. Сутырин
Publication year - 2018
Publication title -
pisʹma v žurnal tehničeskoj fiziki
Language(s) - English
Resource type - Journals
eISSN - 1726-7471
pISSN - 0320-0116
DOI - 10.21883/pjtf.2018.20.46887.17402
Subject(s) - shock wave , jet (fluid) , cross section (physics) , rotational symmetry , shock (circulatory) , mechanics , physics , gas phase , flow (mathematics) , shear (geology) , materials science , mathematics , geometry , thermodynamics , composite material , medicine , quantum mechanics
Three-dimensional interaction of a shock with lateral low-density gas channel of round, elliptic or rectangular cross-section is numerically studied using Euler’s equations. The structure of formed shock wave precursor is described in detail. Internal shear layer instabilities in three-dimensional flow are shown to develop faster than in axisymmetric case. Moderate amplification of high-pressure jet cumulation effect is noted for elliptic and rectangular channel cases. Dependence of precursor growth rate on cross-section shape is studied. It is found that stretching of cross-section shape significantly increases the duration of linear precursor growth phase.