Fluid flow guide element and fluid flow apparatus equipped therewith
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United States of America Patent
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Jul 15, 2008
Grant Date -
Oct 13, 2005
app pub date -
Jun 8, 2005
filing date -
Feb 12, 2004
priority date (Note) -
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status (Latency Note)
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Abstract
A fluid flow guide element (1) constructed, for example, as a diffuser having an inlet opening (2) and an outlet opening (3) whose respective cross-sectional areas differ from one another. Corresponding to the exterior view shown in FIG. 1, the inside wall surface (4) of the fluid flow guide element (1) is provided with spirally arranged recesses (5) and elevations (6) having an inclination (7) relative to a longitudinal axis (8) of the guide element (1). The recesses (5) and/or elevations (6) have a width that increases or decreases steadily between the inlet opening (2) and the outlet opening (3). This facilitates efficient operation of a fluid flow guide element (1) which simultaneously has both a large opening angle and a reduced design length by achieving a more uniform flow or flow profile due to the spiral arrangement of the recesses (5) and elevations (6).
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