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美国政府科技报告
>TRANSONIC INVESTIGATION OF THE EFFECTS OF NOSE BLUNTNESS, FINENESS RATIO, CONE ANGLE, AND BASE SHAPE ON THE STATIC AERODYNAMIC CHARACTERISTICS OF SHORT, BLUNT CONES AT ANGLES OF ATTACK TO 180°
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TRANSONIC INVESTIGATION OF THE EFFECTS OF NOSE BLUNTNESS, FINENESS RATIO, CONE ANGLE, AND BASE SHAPE ON THE STATIC AERODYNAMIC CHARACTERISTICS OF SHORT, BLUNT CONES AT ANGLES OF ATTACK TO 180°
An investigation has been conducted in the Langley transonic blowdown tunnel to determine the effects of variations in Mach number, nose bluntness, fineness ratio, cone semiangle, and base shape on the static longitudinal characteristics of low-fineness-ratio blunted cones. The tests were made at Mach numbers from about 0.8 to 1.2 through an angle-of-attack range that generally varied from 0°' to l8o°. Reynolds number, based upon the base diameter, varied from 3.67 X 10 to 5.32 X 106.nThe results of the investigation indicate that all shapes tested have a stable trim point at an angle of attack of l8o° that is undesirable for a passive entry body designed to enter along a purely ballistic path.
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