Trials prove potential for jet noise reduction
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Camcon Technology product story
Edited by the Engineeringtalk editorial team
Mar 21, 2005
A pair of Camcon Technology binary valves have now completed more than 25 billion operations in laboratory trials, proving the feasibility of efficient jet aircraft noise reduction.
A pair of Camcon Technology binary valves have now completed more than 25 billion operations in laboratory trials, proving the feasibility of efficient jet aircraft noise reduction.
Active control for aero-engine noise suppression requires high speed, long life valves capable of frequency and amplitude modulation.
Traditional actuator and valve technologies used in the control of liquids and gases typically have a service life of 10 million operations.
The Camcon digital valve offers a 2500 times improvement on that figure, an essential requirement for an efficient jet aircraft noise reduction system.
In experiments at Berlin Technical University, Camcon Binary Actuation Technology (BAT) valves have already been shown to reduce the front-end high-pitched noise emitted by jet engine blades by more than 20dB at critical frequencies.
"To suppress noise for 20% of flight operations supporting a system life of 20,000 hours at an average frequency of 1000Hz would require a valve life of at least 15 billion cycles", said Bryn Jones, aerospace industry consultant.
"By demonstrating a valve life of more than 25 billion cycles, as well as with frequency and amplitude modulation, Camcon offers promise of a practical means to enable active noise control at source".
"The lifetime performance of Camcon binary valves has been proved once again".
"We are delighted with the results and we are working closely with companies involved in jet noise reduction to implement our technology in prototype products", said Wladyslaw Wygnanski, inventor of the Camcon Binary Actuator and Managing Director of Camcon Technology.
Two binary valves have been undergoing tests at Camcon's research and development facility in Cambridge since January 2002, with each actuator driven at 526 changeovers per second, equivalent to more than 30,000 times per minute.
To date neither actuator shows any signs of wear.
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