Perforated plate for evening out the velocity distribution

Details Perforated plate for evening out the velocity distribution Perforated plate for evening out the velocity distribution

1983-06-20

1985-12-17

Thomas, Alexander S.

Stock material or miscellaneous articles

All metal or with adjacent metals

Having aperture or cut

428131, 7386152, 13762528, 138 37, B32B 310

Patent

active

045592756

ABSTRACT:
In a perforated plate (1) for evening out the velocity distribution in a flow channel, the passage holes (2) are designed as shock diffusers arranged in parallel. For this purpose, they are provided with an inlet diameter (d) on the inflow side (3) and with a larger outlet diameter (D) on the outflow side (4) of the perforated plate. Due to this design, a relatively large blocking (area ratio of blocked flow cross-section to the free flow cross-section) on the inflow side and a relatively small blocking on the outflow side of the perforated plate are obtained. To ensure a shock diffuser effect, the length of the outlet holes must be sized such that the flow makes contact again before the outlet edge thereof. Important advantages of this perforated plate are that, with a relatively low pressure drop coefficient, a very good evening-out effect and a short back-flow zone on the outflow side of the perforated plate are achieved. Perforated plates of this type are used in the construction of turbo machines, in particular in gas turbines.

REFERENCES:
patent: 3840051 (1974-10-01), Akashi et al.
patent: 4262049 (1981-04-01), Kaspar

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