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Experimental Investigation of Spreading Characteristics of Choked Jets Expanding into Quiescent AirInvestigations have been conducted to determine by means of total-pressure surveys the boundaries of single and twin jets discharging through convergent nozzles into quiescent air. The jet boundaries for the region from the nozzle outlets to a station 6 nozzle diameters downstream are presented for nozzle pressure ratios ranging from 2.5 t o 16.0 and for twin-Jet nozzle center-line spacings ranging from 1.42 to 2.50 nozzle diameters. The effects of these parameters on the interaction of twin Jets are discussed. In order to ascertain the utility of the results for other than the test conditions, the effects of jet temperature, Reynolds number, and humidity on the pressure boundaries have been briefly investigated. The result indicate that for a jet of 2.6 the pressure boundaries are slightly smaller than those of corresponding unheated jets and that the effects of Reynolds number and humidity are negligible.
Document ID
20050080794
Acquisition Source
Langley Research Center
Document Type
Other - NACA Research Memorandum
Authors
Rousso, Morris D. (National Advisory Committee for Aeronautics. Lewis Flight Propulsion Lab. Cleveland, OH, United States)
Kochendorfer, Fred D. (National Advisory Committee for Aeronautics. Lewis Flight Propulsion Lab. Cleveland, OH, United States)
Date Acquired
August 22, 2013
Publication Date
August 9, 1950
Subject Category
Aircraft Design, Testing And Performance
Report/Patent Number
NACA-RM-E50E03a
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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