COMPUTATIONAL SIMULATION OF LAMINAR AND TURBULENT UNSTEADY SUPERSONIC FLOW OF A DISCHARGED PROJECTILE FROM A TUBE

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AHMADIKIA H.; ELIASI H.

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Paper Information

Journal: Journal of Aerospace Mechanics Year:2008 | Volume:4 | Issue:2 (12) Page(s): 45-56

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Title

COMPUTATIONAL SIMULATION OF LAMINAR AND TURBULENT UNSTEADY SUPERSONIC FLOW OF A DISCHARGED PROJECTILE FROM A TUBE

Author(s)

AHMADIKIA H. | ELIASI H. | Issue Writer Certificate

Keywords

PROJECTILEQ2

SUPERSONIC FLOWQ3

TURBULENCEQ2

MOVING BOUNDARYQ3

MULTI-BLOCK GRIDQ3

Abstract

In this work, unsteady laminar and turbulent SUPERSONIC FLOWs of a discharged PROJECTILE from a tube have been numerically simulated. The equations of axisymmetric viscous compressible flow has been computed by Van Leer flux vector splitting method, using time and space second order accuracy and MOVING BOUNDARY considerations.When a PROJECTILE is discharged from a tube, a complicated flow in its front and back is created which this flow includes expansion and shock waves. Complicated intractions between these waves make the analysis of this flow very difficult. The numerical simulation predicts expansion wave, bow shock wave in front of PROJECTILE, barrel shock wave, Mach disk, vortex ring, and shear layer. Results show that, there are not many differences between the laminar and turbulent flow arrangements, but the aerodynamic forces are different. The variation of acceleration and aerodynamic forces, when PROJECTILE is discharging from a tube, due to more intractions between the expansion and shock waves, is large and causes vibration of the PROJECTILE and change in its path. When PROJECTILE starts to discharge from a tube, the acceleration will be maximum, but when discharges entirely from tube, the resistant force are increased and the acceleration is decreased.

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References

INTERACTION OF EXHAUST PLUME FROM FIXED AND MOVING NOZZLES WITH A SOLID WALL

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APA: Copy

AHMADIKIA, H., & ELIASI, H.. (2008). COMPUTATIONAL SIMULATION OF LAMINAR AND TURBULENT UNSTEADY SUPERSONIC FLOW OF A DISCHARGED PROJECTILE FROM A TUBE. AEROSPACE MECHANICS JOURNAL, 4(2 (12)), 45-56. SID. https://sid.ir/paper/101875/en

Vancouver: Copy

AHMADIKIA H., ELIASI H.. COMPUTATIONAL SIMULATION OF LAMINAR AND TURBULENT UNSTEADY SUPERSONIC FLOW OF A DISCHARGED PROJECTILE FROM A TUBE. AEROSPACE MECHANICS JOURNAL[Internet]. 2008;4(2 (12)):45-56. Available from: https://sid.ir/paper/101875/en

IEEE: Copy

H. AHMADIKIA, and H. ELIASI, “COMPUTATIONAL SIMULATION OF LAMINAR AND TURBULENT UNSTEADY SUPERSONIC FLOW OF A DISCHARGED PROJECTILE FROM A TUBE,” AEROSPACE MECHANICS JOURNAL, vol. 4, no. 2 (12), pp. 45–56, 2008, [Online]. Available: https://sid.ir/paper/101875/en

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