1、RESEARCH M EMORAN DUM GENERALIZATION OF TURBOJET AND TURBINE-PROPELLER ENGINE PERFORMANCE IN WINDMILLING CONDITION By Lewis E. Wallner and Henry J. Welna Lewis Flight Propulsion Laboratory . “. , ,$. bin a, cdd I ma ri a! -. cd in- C,k Y -yu YdW R 2 .5 0 .2 .4 .i; .8 1.0 1.2 B Figure 7. - Variation
2、of engine total-pressur- change with engirlt.-speed parameter Corrected engine-speed parameter, N/N, 6 for turbine-propeller engine in windmjlllng condition. Data obtained at alti- tudes between 5000 and 40,000 feet. Provided by IHSNot for ResaleNo reproduction or networking permitted without licens
3、e from IHS-,-,-0 u NACA RM E51J23 13 (b) Combustor. 0 .2 .4 .s .8 1.0 1.2 Corrected ergine-speed parameter, li/Nr (c) Turbine. Figure 8. - Variation of component pressure changes with ewine-speed parameter for two turbine-propeller engines in windmilling condition. Data obtained at altitudes between
4、 5000 and 40,000 feet. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-14 1 NACA RM E51523 0 .2 .4 .6 .8 1.0 Corrected engine-speed parameter, N/Nr fi Figure 9. - Variation of wiridmilling-propellHr-drag parameter with engine-speed parameter for two
5、turbine-propeller erginas at alti- tudes from 5000 to 40,000 feet; propeller blade angle set for maximum windmilling speed. - Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-p“- NACA RM E51523 Figure 10. - Variation of air-flow parameter with corrected engine-speed parameter for two turbine-propeller engines in windmilling condition. Data obtained at altitudes between 5000 and 40,000 feet. NACA-Langley - 12-12-51 - 325 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
