| 摘要 |
PROBLEM TO BE SOLVED: To provide an autogenous swirl flow generating method, generating device, control method and verifying method for the effect, which have a turbulence restraining effect with good workability and maintenanceability by utilizing an outside surface Coanda effect. SOLUTION: In the autogenous swirl flow generating and maintaining control, it is necessary to provide on the downstream side a fluid introducing device for introducing a fluid toward an axisymmetric tube axis to decrease a swirl direction component of a downstrea flow and a second fluid introducing device on the upstream for introducing a fluid in the tangential direction of an axisymmetric circular section (36, 35 in the drawing). In fluid introduction on the upstream of an autogenous swirl flow generating device where an axisymmetric annular Coanda outer curved surface and the large radius of rotation side end of a fixed rotor gradually decreased in radius of rotation are smoothly connected, when the downstream autogenous swirl is incompletely caused, or when a turbulence restraning effect is not obtained, fluid introduction for temporarily giving a flow component in the swirl direction is made.
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