1303 2次元CFDによるロケットノズルに生じる非定常横推力に関する研究(GS-5 数値流体力学と乱流(1))

概要

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In the present report, transient side thrust fluctuations in the latest rocket nozzle are researched. In the latest rocket nozzle, a large side thrust fluctuations in transient condition ( start up or shut down ) are reported. It is considered that the flow asymmetry in the nozzle is responsible for the side thrust. To research this phenomina quantitatively, 3D unsteady,CFD is neccesary. But 3D unsteady CFD needs huge calculation time. In this report, 2D unsteady CFD is used to reserch the flow patern and shock behavior qualitatively. The results show that the side thrust fluctuation has 2 modes. One is caused by instability of flow downstream^ of normal shock, the other is associated with the transition from Cap Shock to Mach Disk.
社団法人日本機械学会の論文
2001-03-16