Accession Number:

AD0281765

Title:

A STUDY OF AERODYNAMIC EFFECTS OF ISOTHERMAL AND TEMPERATURE GRADIENT ATMOSPHERES ON RE-ENTRY TRAJECTORIES,

Descriptive Note:

Corporate Author:

POLYTECHNIC INST OF BROOKLYN N Y

Personal Author(s):

Report Date:

1962-03-01

Pagination or Media Count:

22.0

Abstract:

The behavior of skip and impact trajectories of space vehicles entering an atmosphere in which temperature varies with altitude is studied. The atmosphere is divided into layers, each of which is characterized by an appropriate temperature gradient. Numerical results for heat transfer rates, relative decelerations and altitude as functions of flight time, and an altitude-range history for STD Day ARDC Model Atmosphere, 1959 Hot and Cold Day, are presented for selected re-entry conditions. These results are compared with those obtained in an isothermal exponential atmosphere for the same re-entry conditions. The difference in peak heat transfer rates and maximum relative decelerations in the two atmospheric models is not significant for properly selected scale heights. However, the effect of temperature variation upon minimum elevation for the skip trajectory and upon range to point of impact for impact trajectories is noticeable. Author

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Distribution Statement:

APPROVED FOR PUBLIC RELEASE