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Experimental comparison of Dual Bell and Expansion Deflection Nozzles
47th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit
Replacing conventional bell nozzles with altitude compensating forms represents an attractive proposition for launch vehicle design, as both efficiency across the altitude range and altitude performance. through the use of larger area ratios. may be increased. This paper compares the performance of two such compensating nozzle types, the Expansion Deflection and Dual Bell, through a series of cold flow tests conducted at nozzle pressure ratios encompassing the entirety of the compensatingdoi:10.2514/6.2011-5688 fatcat:qzk7acbd5zfn7lvors52azncv4