首页 | 本学科首页   官方微博 | 高级检索  
     


Solution in one-dimensional approximation of the variational problem of constructing a maximum-thrust nozzle for gas-particle flow
Authors:A. N. Kraiko  V. K. Starkov  L. E. Sternin
Abstract:In view of the complexity of the exact solution to the variational problem of constructing an optimum nozzle for gas-particle flow (see, for example, [1]) its solution in the one-dimensional approximation is of interest. In certain studies of this sort, by Marble [2] and Sternin [3], in addition to the assumption of one-dimensionality, an important role is also played by additional assumptions of smallness in the differences of the gas and particle velocities (and temperatures), which characterize the dynamic and thermal lag. The resulting linearization, used in [2, 3], not only narrows still further the region of validity of the one-dimensional approximation, but also leads to certain qualitative characteristics which do not correspond to the actual flow. For example, it is found [3] that variation of the contour curvature at only a single point may yield a finite thrust increment.In the following a solution of this problem is obtained without the additional assumptions as to smallness of the lag and the corresponding linearization.The authors wish to thank T. P. Baranova and A. M. Konkina for assistance in this study.
Keywords:
本文献已被 SpringerLink 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号