| Revision as of 21:00, 30 January 2007 editGenick (talk | contribs)134 edits ←Created page with ' thumb|300px|Fig. 1: View of the flow direction for oblique shock Detached shock is referred to situation in which shock isn't touching th...' | Revision as of 07:53, 24 March 2007 edit undoGuy M (talk | contribs)Extended confirmed users, Rollbackers5,229 editsm Wikified.Next edit → | ||
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| Detached shock is referred to situation in which shock isn't touching the body. This |
'''Detached shock''' is referred to situation in which shock isn't touching the body. This occurs when a ] flow is inclined to ] (boundary conditions). If the inclined angle is exceeded maximum value the ] solution to ] results into a ] of negative number. The physical implication is that there isn't a shock angle that can exist that satisfies normal shock and the boundary conditions in the same time. Thus, a ] occurs. The normal shock occur same distance from the body which depends on the ] (flow velocity and ]). | ||
| is exceeded maximum value the Bar-Meir solution to ] results into a square root of negative number. The physical implication is that there isn't a shock angle that can exist that satisfies normal shock and the boundary conditions in the same time. Thus, a ] occurs. The normal shock occur same distance from the body which depends on the Mach number (flow velocity and | |||
| speed of sound). | |||
| == History == | == History == | ||
| The detached shock has a significance in increasing the resistance to movement in super sonic flow. | The detached shock has a significance in increasing the ] to movement in super sonic flow. | ||
| This phenomenon was discovered when the people try to increase the velocity of airplanes and the | This phenomenon was discovered when the people try to increase the ] of airplanes and the | ||
| propeller show remarkable reduction in power above certain point which turn to shock and detached shock. This phenomenon is significant in reentry of space vehicle when the major contribution to the heating is due to normal shock (detached shock) temperature increase. The mathematical solution of this problem was found in 2004 that explain what physically was known since Mach discovery. | propeller show remarkable reduction in power above certain point which turn to shock and detached shock. This phenomenon is significant in reentry of space vehicle when the major contribution to the heating is due to normal shock (detached shock) temperature increase. The mathematical solution of this problem was found in ] that explain what physically was known since Mach discovery. | ||
| ==External links== | ==External links== | ||
Revision as of 07:53, 24 March 2007
Detached shock is referred to situation in which shock isn't touching the body. This occurs when a supersonic flow is inclined to surface area (boundary conditions). If the inclined angle is exceeded maximum value the Bar-Meir solution to oblique shock results into a square root of negative number. The physical implication is that there isn't a shock angle that can exist that satisfies normal shock and the boundary conditions in the same time. Thus, a normal shock occurs. The normal shock occur same distance from the body which depends on the Mach number (flow velocity and speed of sound).
History
The detached shock has a significance in increasing the resistance to movement in super sonic flow. This phenomenon was discovered when the people try to increase the velocity of airplanes and the propeller show remarkable reduction in power above certain point which turn to shock and detached shock. This phenomenon is significant in reentry of space vehicle when the major contribution to the heating is due to normal shock (detached shock) temperature increase. The mathematical solution of this problem was found in 2004 that explain what physically was known since Mach discovery.
External links
- Fundamentals of compressible flow mechanics - Genick Bar-Meir, Ph.D.
- Shockwave calculator (Java applet).