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Predicted air entrainment by subsonic free round jets.
Cook EB; Singer JM
J Spacecraft and Rockets 1969 Sep; 6(9):1066-1070
With the ultimate objective of developing a method for predicting mixing spread of buoyant and momentum-controlled hydrogen plumes and of air pollutants exhausted into the open atmosphere, our approach is to develop a method of calculation based on theoretical and empirical analyses and not compare the theoretical predictions with experimental results obtained by ourselves and others. Our experiments cover free jets of helium, argon, and methane discharging at relatively low velocities into "ambient" air. A semiempirical correction is made for the effect of buoyancy based on Froude numbers and entrainment data of Ricou and Spalding. The computed results also are compared with the Morton analyses, in which approximations and simplifications are applied to jet entrainment with small density gradients.
Jets; Jet exhausts; Air pollutants; Mathematical models; Airflow; Aircraft
1333-74-0; 7440-59-7; 7440-37-1; 74-82-8
Issue of Publication
Journal of Spacecraft and Rockets
Page last reviewed: May 20, 2022
Content source: National Institute for Occupational Safety and Health Education and Information Division