Accession Number:

ADA050747

Title:

Effect of Injector Geometry on Characteristics of a Liquid Jet Injected Normal to a Supersonic Air Stream,

Descriptive Note:

Corporate Author:

VIRGINIA POLYTECHNIC INST AND STATE UNIV BLACKSBURG DEPT OF AEROSPACE AND OCEAN ENGINEERING

Personal Author(s):

Report Date:

1974-10-01

Pagination or Media Count:

9.0

Abstract:

An experimental investigation concerning the effect of injector geometry on liquid jet characteristics is reported in this paper. The penetration and spread of the jet were given major emphasis in the present work. Attention was also directed to the jet structure, separation zone and liquid layers. Circular and rectangular injectors of four different port areas were tested in a Mach 3 air stream over a wide range of jetfree stream dynamic pressure ratio. For the rectangular injectors both aligned and transverse configurations with respect to the cross flow were studied. The penetration and spread data were obtained from streak photographs and the jet structure was examined using spark photomicrographs. Correlations for jet penetration and spread were developed by analyzing the jet as a blunt body in supersonic flow. The effect of injector geometry was incorporated through an experimentally obtained factor. The penetration correlation provided a good fit for the experimental data, however, the width correlation was less satisfactory. It was observed that the transverse configuration of the jet has the most pronounced jet breakup and the largest liquid surface layers. Author

Subject Categories:

  • Fluid Mechanics
  • Jet and Gas Turbine Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE