Throttleable swirling injector for combustion chambers
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United States of America Patent
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Issued Date -
Feb 8, 2007
app pub date -
Aug 2, 2005
filing date -
Aug 2, 2005
priority date (Note) -
Abandoned
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Abstract
A throttling injector is constructed with a swirl chamber, a plurality of tangentially directed liquid fuel inlets and an outlet orifice, the inlets arranged to create a swirling flow in the swirl chamber to leave through the outlet in a stream that is in the shape of a hollow tube or cone. Variations in the number of inlets that are actuated results in variations in the thickness of the wall of liquid in the tube or cone and hence variations in the volumetric flow rate of fuel ejected from the outlet orifice without changing the linear velocity of the fuel in the axial direction through the orifice or the pressure drop across the orifice. The injector thus permits throttling to occur from a high to a low volumetric fuel flow rate without the chugging instability that plagues liquid-fuel-fed combustion chambers of the prior art.
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