The Use of Perforated Inlets for Efficient Supersonic Diffusion
Abstract
The use of vail perforations on supersonic diffusers to avoid the internal contraction-ratio limitation Is described. Experimental results at a Mach numberof 1.85 on a preliminary model of a perforated diffuser haying a geometric internal contraction ratio of 1.49 (the isentropic value) are presented. A theoretical discussion of the flow coefficients as well as the size and the spacing of the perforations is also included. At angles of attack of 0, 3, and 5 deg, total-pressure recoveries of 0.931, 0.920, and 0.906, respectively, were obtained.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1956
- Accession Number
- AD0107148
Entities
People
- John C. Evvard
- John W. Blakey
Organizations
- National Advisory Committee for Aeronautics