JASC
Active Combustion Control Valve (ACCV)
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JASC Active Combustion
Control Valve |
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JASC Active Combustion Control Valve Description
The Active Combustion Control Valve is being developed to attenuate
undesireable pressure pulses within the combustion chamber of a
turbine engine. These valves are derived from patented JASC servo
valve technology that employ a robust and extremely reliable means
for metering and modulating fuel flow over a broad range of conditions
- all in a relatively compact and light-weight package.
Benefits and Features
*Variant of JASC’s 3-Way EHSV to Achieve High-Speed Servo
Valve (HSSV)
*Designed to Attenuate Pressure Pulses within Combustor
*Operates on the Principle of Modulating Fuel Pressure Pulses Out
of Phase with Combustion Pressure Pulses
*Demonstrated Response w/in 5 dB to 550 Hz and w/in 10 Db to 600
Hz using Liquid Fuel in the Lab (Modulation Strength of +/- 20%
@ 300 pph)
*Have Design Leading to 800 Hz and Higher Versions
*Applications Include Both Industrial and Aircraft Turbine Engines
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JASC
Active Combustion Control Valve System |
(click for
larger image) |
JASC Active Combustion Control Valve System
The high-speed servo valves mounted on a manifold together with
amplifier-drivers yields a system which is capable of controlling
high-frequency pressure oscillations associated with combustion
instabilities in lean-burn combustors and afterburners. JASC’s
Active Combustion Control Valve (ACCV) uses patented JASC clevis-valve
technology to achieve a High-Speed Servo-Valve (HSSV) enabling single-port
and multi-port (synchronous) flow-based frequency response up to
600 Hz @ <-10 dB.
Product Specifications (Active Combustion
Control Valve)
Fuel Media: Most jet-type liquid hydrocarbon fuels
found in commercial airline and US military service
Flow Rate[1]: 20 to 300 pph (TDR=15) @ 100 ±10
psid
Typical Modulation: +/- 50% @ 50 pph; +/- 20% @
200 pph
Frequency Response: -1 dB @ 400 Hz, 0 dB @ 500
Hz
Maximum Inlet Pressure[2]: 800 psig
Fuel Temperature: -65° to +250 °F
Filtration: 10 µm nominal, 25 µm absolute
(integral to inlet fitting, supplied)
Dimensions: 7.5” x 4.5” x 2.5”
Weight: approx. 4.5 lb
Product Specifications (High Speed Servo Valve)
Natural Frequency[3]: 400 Hz
Coil Excitation: 0 to 600 mA
Command Input: 0 to +10 Vdc
Power: -30 to +30 Vdc, 1.0 A Max.
Steady State Flow: Linear with command
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