Event Title

Ablation and Drag Modeling for Reentry of a Blunt Body with Complex Geometry

Start Date

1-3-2011 8:00 AM

End Date

3-3-2011 12:30 PM

Description

An analytical modeling to describe hypersonic movement of a blunt body in an atmosphere is considered. The body is taken to be of unknown shape with complex geometry. We permit further changes in the body shape during the whole luminous part of an atmospheric trajectory. Using the basic differential equations one can introduce the dimensionless parameters describing a problem. Then the study takes an approach that models the body’s mass and other properties based on the height and rate of body deceleration in an atmosphere, which also provides us a good link for better understanding accompanying radiation processes. The model is fitting to the actual data of observations, by selecting key dimensionless parameters describing drag, ablation and rotation rate of a body. The obtained parameters explicitly characterize the ability of entering body to survive an atmospheric entry and reach the ground.

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Mar 1st, 8:00 AM Mar 3rd, 12:30 PM

Ablation and Drag Modeling for Reentry of a Blunt Body with Complex Geometry

An analytical modeling to describe hypersonic movement of a blunt body in an atmosphere is considered. The body is taken to be of unknown shape with complex geometry. We permit further changes in the body shape during the whole luminous part of an atmospheric trajectory. Using the basic differential equations one can introduce the dimensionless parameters describing a problem. Then the study takes an approach that models the body’s mass and other properties based on the height and rate of body deceleration in an atmosphere, which also provides us a good link for better understanding accompanying radiation processes. The model is fitting to the actual data of observations, by selecting key dimensionless parameters describing drag, ablation and rotation rate of a body. The obtained parameters explicitly characterize the ability of entering body to survive an atmospheric entry and reach the ground.