Experimental investigation of thrust augmenting ejectors using vane excited primary jets
McClellan, Thomas Robert
Platzer, Max F.
MetadataShow full item record
An experimental investigation has been conducted to evaluate the entrainment characteristics of a thrust augmenting ejector, with a small, oscillating airfoil inserted in the potential core of the primary jet. Velocity distributions were measured across the width of the jet, at downstream distances of 20 and 40 nozzle widths, with the jet exhausting into still air and with the jet exhausting into an instrumented ejector shroud, for the following range of parameters: Pressure ratio 1.137 and 1. 268, amplitude of oscillation 2.6° and 6.9° zero-to-peak, frequency of oscillation 0, 20, 40 and 60 Hz. Static pressure distributions were measured within the shroud when the ejector was installed. The results amplify previously conducted studies. Jet spreading and entrainment appear to increase with increasing amplitude and frequency of oscillation and to decrease with increasing nozzle pressure ratio.
Approved for public release; distribution is unlimited
Showing items related by title, author, creator and subject.
Cai, W.J.; Chu, Peter C. (1998);The authors report an interdecadal oscillation in a wind- and thermally-driven ocean general circulation model (OGCM). The oscillation is tantalizing in that it occursunder a relatively strong thermal damping(26.3 W ...
Lambright, Harold R. (Monterey, California. Naval Postgraduate School, 1964);The apparently random oscillation of the mixed-layer depth is investigated and, by the nature of its energy spectrum and its correlation with tidal activity, a determination of the source of some components of this ...
Tuite, Joseph M. (Monterey, California. Naval Postgraduate School, 1999-03);The boiling of a highly wetting dielectric fluid, in an oscillating environment, has been investigated. Because of low surface tension, these liquids require very high superheat to initiate nucleate boiling. This high ...