Force and Pressure Tests on Cones with Simulated Ablated Noses at Mach Numbers 8 and 16
Final rept. 10 May-7 Sep 1971
ARNOLD ENGINEERING DEVELOPMENT CENTER ARNOLD AFB TN
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Results are presented from static-force tests and pressure distribution tests of conical bodies with various nose shapes which were chosen to simulate the estimated shapes obtained after significant ablation of the nose had taken place. The basic cone half-angle is 6.3 deg, and the nominal bluntness ratio is 0.25. Nose shapes tested consisted of symmetrical biconics with nose angles of 30, 40, and 50 deg and asymmetrical noses derived from the 50-deg biconic. Results were also obtained for a 50-deg symmetric biconic nose on 4.0- and 9.0-deg cones. The effect of changing the nose-to-cone shoulder radius was investigated on several configurations. Most of the data were obtained at Mach 8, and a limited amount of data was taken at Mach 16. The nominal Reynolds number was 3,100,000 based on the sharp cone length of the 6.3-deg pressure model. For the force tests, the angle-of-attack range was from -5 to 11 deg, and for the pressure tests, the angles of attack included the configuration trim angle and up to 4 deg on either side of the trim angle in increments of generally 1 deg. At Mach 8, data are given for the ablated nose shapes with the vehicle rolled -30, -60, and -90 deg.
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