The results presented are of a series of experimental tests in which a General Electric J85-13 turbojet engine was subjected to both distorted and undistorted inlet total-pressure conditions. A distinctive feature of the data base obtained is that it includes compressor interstage informa¬tion not previously recorded for a J85-13 engine. Each of the eight compressor stages was in¬strumented to obtain the characteristics of the individual stages for undistorted inlet conditions, and these data are documented in the report along with the undistorted compressor overall per¬formance. Also included in the report is the overall performance of the compressor exposed to 14 different distorted-inlet conditions - 10 circumferential patterns and 4 radial patterns. The distortion patterns were introduced using screens that spoiled from 8 to 50 percent of the com¬pressor face area;the distortion screen density, or the area blocked by the screen wire per unit area of screen, varied from 26 to 69 percent.
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