1、TECHNICAL NOTE 0-71 AN APPROXIMATE METHOD FOR CALCULATING SURFACE PRESSURES ON CURVED PROFILE BLUNT PLATES IN HYPERSONIC FLOW By Marcus 0. Creager Ames Research Center Moffett Field, Calif. NATIONAL AERONAUTICS AND SPACE ADMINISTRATION WASHINGTON September 1959 CALCUIATILG SCIikACB FIiESSL6E5 CB CbE
2、VEC LCPIIE tLffbl IILSES Ib HYILCblC FLCW (EASA) TC z5 - - f: + factor defined as y 2 + 0.166(7-1) 1 7 empirical constant (see eq. (6) pressure drag coefficient based on plate thickness and unit width constant in linear viscosity relation, VW TW T = cwII constant equal to 0.112 for air and 0.169 for
3、 helium plate thickness or leading-edge thickness pressure drag in free-stream direction plane blast-wave parameter, - M, = 5.7, Rernd = 9,720, A = 4, air. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-20 . Provided by IHSNot for ResaleNo reproduct
4、ion or networking permitted without license from IHS-,-,-21 X Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-22 a kc 0 5 . 3 II c Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-. 00 0 0 m(D d (u Pro
5、vided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-24 f W w 0 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Y 10.0 8.0 6.0 4.0 2.0 I .o .8 .6 .4 .2 I .I .2 .6 .8 I X - d 2 4 Figure 9.- Comparison of vario
6、us terms of equation (4). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-c W 0 rl . . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-40 20 IO 4 2 I .I .2 .4 .6 .8 I X - d 2 4 Figure 11.- Comparison of various methods of calculation to measurements for M, = 5.7, Re,d = 9,720, = 0 , A = 3. NASA - Langley Field, Va A-299 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
