SPHERE DRAG IN THE FREE-MOLECULAR AND TRANSITIONAL FLOW REGIMES
- 1 April 1970
- report
- Published by Defense Technical Information Center (DTIC)
Abstract
Results are presented of sphere drag measurements made in the free- molecular and transitional flow regimes. The drag data were obtained using a drag balance and the free-flight technique. Conditions for which measurements were made are given. An analysis of the drag on a sphere in rarefied flow is also presented, and the results are compared with experimental data and other theories. The analytical results well predict the trend of the experimental data in the transition regime and remain valid at Knudsen numbers for which previous theories are not applicable.Keywords
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