PASSIVE EDGE-TONE SUPPRESSION METHOD
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United States of America Patent
Stats
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Nov 8, 2016
Grant Date -
Nov 17, 2016
app pub date -
May 13, 2015
filing date -
May 13, 2015
priority date (Note) -
Granted
status (Latency Note)
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Abstract
The passive edge-tone suppression method includes the step of inserting a central insertion tube within a nozzle to disturb jet oscillations in a flow field of an edge-tone feedback loop. The central insertion tube can have a diameter of 200 micrometers and can be inserted within a center of the nozzle. The method also includes the step of extending the central insertion tube through the nozzle and into an alignment with the edge producing the edge tone. Further, the method includes the step of increasing a length of the central insertion tube in relation to a stand-off distance between the nozzle and the edge. The length of the central insertion tube can be increased to a length of about 30 percent of the stand-off distance.
First Claim
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