Liquid atomization by coaxial rocket injectorsThe atomization characteristics of a scaled-down version of a coaxial rocket injector was investigated using a phase Doppler particle analyzer (PDPA). The injector was operated in the conventional mode with liquid being injected through its inner orifice and gas being injected through its outer annulus. The shearing action occurring at the liquid-gas interface causes the liquid jet to atomize. In this study, two different liquid-air systems, namely a water-air system and a liquid nitrogen-gaseous nitrogen system, were chosen for detailed investigation. This paper discusses the performance characteristics of the coaxial injector under different flow and geometric conditions. Specifically, the effects of injection gas pressure and the injector cavity size on variables such as the mean particle diameter, Sauter mean diameter, number density, volume flux, and velocity have been presented.
Document ID
19910036965
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Sankar, S. V. (Aerometrics, Inc. Sunnyvale, CA, United States)
Brena De La Rosa, A. (Aerometrics, Inc. Sunnyvale, CA, United States)
Isakovic, A. (Aerometrics, Inc. Sunnyvale, CA, United States)
Bachalo, W. D. (Aerometrics, Inc. Sunnyvale, CA, United States)