กก3/6/2003
1.
Flow control equations:
Axis-symmetric Euler equations + one species equation.
2. Numerical method: CESE method
3.
Computational Domain: [0, 56.9 ft]
x [-30, 30 ft]
(Because of symmetry, only up half of the domain is calculated)
4.
Mesh: 6,400,000 cells
(Inside and near thrust tube,
the mesh is uniform; the others are stretching)
5.
Boundary conditions:
--
On solid wall and symmetric line, reflective boundary condition is used.
-- On outlet and open surface, non-reflective boundary condition is used.
6.
Flow conditions:
Chamber temperature T = 510 R; Chamber
pressure P = 15.0 Psia;
Equivalence ratio F
= 1.3;
Freq. = 60 Hz
C-J detonation velocity VC-J = 6200 ft/sec.;
Pressure jump P2/P1 = 16.667.
Diameter of tube = 5 inches, and its length =26.138inches.
7.
Pressure contour:
At time 40.15 ms
At time 99.36 ms
Movie
(up
to 6 cycles, 100ms):
(17 MB GIF format)
8.
Domain and checking points distribution:
9. Pressure history (up to 6 cycles, 100ms) :
Pressure history on the wall at the dead end of the thrust tube.
| 5 ft | 10 ft | 15 ft | 20 ft | 25 ft | 30 ft | 35 ft | 40 ft | 45 ft | 50 ft | |
| 0o | P-t | P-t | P-t | P-t | P-t | P-t | P-t | P-t | P-t | P-t |
| 3o | P-t | P-t | P-t | P-t | P-t | P-t | P-t | P-t | P-t | P-t |
| 6o | P-t | P-t | P-t | P-t | P-t | P-t | P-t | P-t | P-t | P-t |
| 9o | P-t | P-t | P-t | P-t | P-t | P-t | P-t | P-t | P-t | P-t |
| 12o | P-t | P-t | P-t | P-t | P-t | P-t | P-t | P-t | P-t | P-t |
| 15o | P-t | P-t | P-t | P-t | P-t | P-t | P-t | P-t | P-t | P-t |
| 18o | P-t | P-t | P-t | P-t | P-t | P-t | P-t | P-t | P-t | P-t |
| 21o | P-t | P-t | P-t | P-t | P-t | P-t | P-t | P-t | P-t | P-t |
| 24o | P-t | P-t | P-t | P-t | P-t | P-t | P-t | P-t | P-t | P-t |
| 27o | P-t | P-t | P-t | P-t | P-t | P-t | P-t | P-t | P-t | P-t |
| 30o | P-t | P-t | P-t | P-t | P-t | P-t | P-t | P-t | P-t | P-t |
| 33o | P-t | P-t | P-t | P-t | P-t | P-t | P-t | P-t | P-t | P-t |
| 36o | P-t | P-t | P-t | P-t | P-t | P-t | P-t | P-t | P-t | P-t |
| 39o | P-t | P-t | P-t | P-t | P-t | P-t | P-t | P-t | P-t | -- |
| 42o | P-t | P-t | P-t | P-t | P-t | P-t | P-t | P-t | P-t | -- |
| 45o | P-t | P-t | P-t | P-t | P-t | P-t | P-t | P-t | -- | -- |
