Nozzle having a variable neck section for a spacecraft thruster provided with a mobile needle
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United States of America Patent
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Dec 27, 2016
Grant Date -
Jan 7, 2016
app pub date -
Mar 4, 2014
filing date -
Mar 7, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A nozzle of variable throat section for an aerospace vehicle thruster, the nozzle including a cylindrical housing presenting a throat of aperture diameter less than the diameter of the housing, and a needle suitable for sliding inside the housing between a high discharge rate front position in which the nose is set back from the throat of the housing, and a low discharge rate rear position in which the nose is in abutment against the throat, the needle including a rod for sliding inside the housing of the nozzle, the rod terminating in a nose of decreasing diameter. The nose of the rod is suitable for coming into abutment against the throat of the nozzle housing forming a seat and includes at least two axial grooves formed in its outer periphery to allow gas to pass when the nose is axially in abutment against the throat of the housing of the nozzle.
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