Shock body interactions

kkanadekkanade Forum Coordinator Posts: 3,081

Hello Experts,

Does the geometry of the body play a major role in supersonic flows? More specifically, will it impact the shock formation?

Comments

  • KremellaKremella Admin Posts: 2,326

    Hello @kkanade ,

    Yes, the geometry does indeed play a major role. If you have sharp nosed body, you will have a shock that is attached to the body. On the other hand, if your body is blunt, the shock wave is detached from the body takes the form of a bow and hence called the bow shock. For example, any re-entry capsule (like the Apollo capsule) generates a bow shock when re-entering in the atmosphere. The bow shock can be described as a combination of all the oblique shock solutions for the free-stream Mach number. Indeed, in front of the stagnation point the shock would be locally normal to the flow direction, while moving away from it the bow shock would be inclined as an oblique shock until the shock's end as a Mach wave. For this reason, behind a bow shock we would find a region of subsonic flow near the stagnation point surrounded by regions of supersonic flow as we move far away from the stagnation point.

Sign In or Register to comment.