1973 Volume 16 Issue 93 Pages 529-540
Concerning double concentric jets, the authors performed experimental studies on influences of nozzle conditions such as thickness of nozzle wall or boundary layers on the inside and outside walls of a nozzle on the characteristics of jets in the main region. And the following results are obtained. (1) In the main region, the dimensionless radial velocity profile fits the cosine curve independently of values of δ^-, λ and χ^-. (2) The velocity decay on the central axis and the intensity of turbulence are hardly affected by the value of δ^- for small values of λ. But for large values of λ, the tendency of velocity decay becomes remarkable and the intensity of turbulence is affected heavily by the wake behind the nozzle wall with an increase in the value of δ^-. (3) Values of ι^- and ε^- vary in radial and axial directions and these values are different respectively in both cases of large and small values of λ.
JSME International Journal Series C Mechanical Systems, Machine Elements and Manufacturing
JSME International Journal Series B Fluids and Thermal Engineering
JSME International Journal Series A Solid Mechanics and Material Engineering
JSME international journal. Ser. C, Dynamics, control, robotics, design and manufacturing
JSME international journal. Ser. 3, Vibration, control engineering, engineering for industry
JSME international journal. Ser. A, Mechanics and material engineering
JSME international journal. Ser. 1, Solid mechanics, strength of materials