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The IFRF utilizes movable block swirl generators in order to allow for accurate and continuous variation of the inlet swirl. The block mechanism for the 500 Nm³/h is shown below.

These swirl generators create flows which can be characterized by an almost constant tangential velocity profile across the inlet duct. Important properties of the inlet swirling flow which have to be characterized are the degree of initial swirl imparted to the flow and the inlet turbulence level. The degree of swirl is characterized by the swirl number defined as:

where W and U stand for tangential and axial velocities, p is the density of the combustion air while Ro (Do/2) is the radius of the combustion air duct . The movable block swirler allows the inlet swirl to be varied from zero to high swirl without changing,the type of inlet vortex. The swirler generates vortices of relatively low levels of isotropic turbulence with the axial fluctuations being of the same order as tangential fluctuations.

VENDOR: IFRF Research Station b.v.

Would you be interested in:

• getting more information about the movable swirl generator?

Please contact us:

IFRF Research Station B.V.
P.O. Box 10 000
1970 CA IJmuiden
The Netherlands

email: sales@ifrf.net