The spatial stability equation of moving jet containing dense suspended solid particles was derived out by means of the continuum phase-coupled model. The stability curves of moving jet far different downstream distan...The spatial stability equation of moving jet containing dense suspended solid particles was derived out by means of the continuum phase-coupled model. The stability curves of moving jet far different downstream distances, Reynolds number of flow-field, particle properties and velocities of jetting device are got by the finite difference method based on the asymptotic method and the Eulerian conservative difference scheme. Founded on the analysis of the obtained stability curves it is found that the positive velocity of jetting device widens the unstable frequency range of flow-field hut the effect of the negative one is contrary. In addition, particles existing in the flow-field curb the instability of flow-field and the effect enhances with the decrease of Reynolds number of flow-field. These conclusions benefit learning the development of moving two-phase jet.展开更多
The stability equation of interface of moving two phase jet and the corresponding equation of particle gas disturbance velocity ration are derived by means of the continuum phase coupling model. The stability curve...The stability equation of interface of moving two phase jet and the corresponding equation of particle gas disturbance velocity ration are derived by means of the continuum phase coupling model. The stability curves of interface of moving two phase jet for different particle properties and velocities of jetting device are given out through numerical computation. Further, sevral important conclusions on the effect of particle property and velocity of jetting device on the growth and propagation of disturbance of interface of moving two phase jet are reched on the basis of analyses of the obtained stability curves. These important conclusions can play a guiding role in studying development of moving two phase jet and executing artificial controls over it in practice.展开更多
文摘The spatial stability equation of moving jet containing dense suspended solid particles was derived out by means of the continuum phase-coupled model. The stability curves of moving jet far different downstream distances, Reynolds number of flow-field, particle properties and velocities of jetting device are got by the finite difference method based on the asymptotic method and the Eulerian conservative difference scheme. Founded on the analysis of the obtained stability curves it is found that the positive velocity of jetting device widens the unstable frequency range of flow-field hut the effect of the negative one is contrary. In addition, particles existing in the flow-field curb the instability of flow-field and the effect enhances with the decrease of Reynolds number of flow-field. These conclusions benefit learning the development of moving two-phase jet.
文摘The stability equation of interface of moving two phase jet and the corresponding equation of particle gas disturbance velocity ration are derived by means of the continuum phase coupling model. The stability curves of interface of moving two phase jet for different particle properties and velocities of jetting device are given out through numerical computation. Further, sevral important conclusions on the effect of particle property and velocity of jetting device on the growth and propagation of disturbance of interface of moving two phase jet are reched on the basis of analyses of the obtained stability curves. These important conclusions can play a guiding role in studying development of moving two phase jet and executing artificial controls over it in practice.
