NASA NACA-TN-4117-1957 Experimental investigation of lift drag and pitching moment of five annular airfoils《五个环形机翼升力 阻力和俯仰力矩的实验研究》.pdf

1、TECHNICALNOTE4117EXPERIMENTALINVESTIGATIONOF IJI?T, DRAG,ANDPITCHINGMOMENTOF FTVEANNULARAIRFOILSByHermanS. FletcherLangleyAeronauticalLaboratoryLangleyField, Va.WashingtonOctober1957Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TECHLIBRARYKAFB,NMF

2、WTIONALADVISORYCO a = 19.5. L-57-2708Figure 13. - Tuft-gridphotographsof flow behind variow wings.Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-. . .-x= 1.5. tx s 25.5(b) A = 2/3; a = 20.1. L-57-2709Figure 13. - Continued.* .Provided by IHSNot for

3、ResaleNo reproduction or networking permitted without license from IHS-,-,-,x. 3.125(c)x = 27. E?5A= 1.0; a = 13.5. L-57-2p.oFigure 13.- Continued.Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-RI.FX = 6.0Ix = 30.0(d) A= 1.5; u= 16.0. Ir57-27KlW3ure 13. - Continued.r a71 ,Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I tx . 4.3p3wI ,(e) A= 3.0; a= 12.0. L.5T-2Figure 13. - Concluded.x= 28.x25Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-