Accession Number : AD0461622


Title :   EXPERIMENTS ON FREE AND IMPINGING UNDEREXPANDED JETS FROM A CONVERGENT NOZZLE


Corporate Author : AERONAUTICAL RESEARCH ASSOCIATES OF PRINCETON INC NJ


Personal Author(s) : Snedeker, Richard S ; Donaldson, Coleman duP


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/461622.pdf


Report Date : Sep 1964


Pagination or Media Count : 178


Abstract : Experiments were performed in which the velocity profiles and decay and spreading properties of free underexpanded jets of cold air were measured. Stagnation point heat transfer parameters for impingement of these jets on various surface shapes were evaluated and correlations made with the free jet data. Pressure distribution and photographic studies of the free and impinging jets revealed that an unusual separated flow phenomenon can exist under certain impingement conditions. Problems associated with changes in jet stability and the effects of interference due to geometric arrangement of the apparatus were considered in a qualitative way.


Descriptors :   *AXISYMMETRIC FLOW , *JET FLOW , DENSITY , FLOW VISUALIZATION , GROUND EFFECT , PRESSURE , SCHLIEREN PHOTOGRAPHY , SHOCK WAVES , STAGNATION POINT , TURBULENCE , VELOCITY


Subject Categories : Fluid Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE