The determination of boundary conditions for free open end of one-dimensional nonsteady flow
Abstract
Boundary conditions for a duct end that is either open to the atmosphere or an essentially infinite reservoir are very complicated, especially if both cases of general flows out of and into a duct are to be considered. A systematic investigation which includes subsonic, supersonic outflow, and sonic inflow is presented herein. The study indicates nine possible wave patterns with their boundaries and locations in the pressure Mach number plane, and all possible condition are covered. The fully and efficiently handled boundary conditions made numerical computations of 1-D nonsteady pipe flow fairly successful. The numerical calculation by using the random choice method shows a good agreement with test results.
- Publication:
-
Acta Aerodynamica Sinica
- Pub Date:
- June 1987
- Bibcode:
- 1987AcAer...5..116Z
- Keywords:
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- Boundary Conditions;
- Boundary Layer Flow;
- Ducted Flow;
- One Dimensional Flow;
- Subsonic Flow;
- Supersonic Flow;
- Unsteady Flow;
- Computational Fluid Dynamics;
- Free Flow;
- Pipe Flow;
- Fluid Mechanics and Heat Transfer