SUPERSONIC DIFFUSER
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United States of America Patent
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Dec 30, 2008
Grant Date -
Jan 22, 2009
app pub date -
Jan 4, 2005
filing date -
Jun 22, 2004
priority date (Note) -
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status (Latency Note)
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Abstract
A pressure-recovery device for a supersonic, continuous wave gas laser is capable of recovering the pressure of the supersonic fluid in an efficient manner and in a relatively light and compact assembly. The supersonic diffuser has a substantially rectangular inlet and top and bottom walls that extend from the inlet in the direction of the flow of gas. The top and bottom walls are separated by a height (l.sub.1) at the inlet and are connected by two side walls. The side walls are separated by a width (h) at the inlet, wherein the ratio of height to width ranges at the inlet from about 0.001 to about 1. A compression region is formed by the top wall, bottom wall and side walls, wherein said top and bottom walls either are or are not symmetric about a central longitudinal axis of the compression region. The top and bottom walls may each in the shape of a Prandtl-Meyer streamline and the side walls are substantially planar, or the top and bottom walls are each in the shape of a lens analogy streamline and the side walls are substantially planar. A plurality of diffusers may be stacked in series with one another, each of the diffusers being substantially similar in construction.
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