AN EXPERIMENTAL STUDY ON THE TURBULENCE CHARACTERISTICS OF A COAXIAL ROUND JET
1978 年 21 巻 155 号 p. 840-847
詳細
1978 年 21 巻 155 号 p. 840-847
The turbulence characteristics of a coaxial round jet are studied experimentally. Measurement is made of the turbulence intensities and Reynolds shear stress for various excess-velocity ratios. The investigation is performed considering that the character of the jet varies towards downstream. It is found that the self-preservation does not apply for this flow field. The turbulence structure varies gradually with a progressing homogeneity of the intensity to the downstream and approaches asymptotically to an axisymmetric wake. The process of variation depends strongly on the initial condition and on the local excess-velocity ratio. Experimental results confirm the theoretical assumption which the authors made in the previous paper.
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