Development of a small-sized acoustic probe for the measurement of pressure pulsations in the gasdynamic duct of gas turbine engines

Gimadiev, Asgat; Bystrov, N. D.; Ильинский, С. А.

doi:10.18287/1998-6629-2014-0-1(43)-98-106

Cited by 1 publication

(2 citation statements)

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“…The research work [15] shows that for acoustic probes a small-size RC-filter can be used as an alternative to corrective element (CE) in the form of long line. As for the CE weight it can be reduced considerably in comparison with the long line weight providing light alloys are used.…”

Section: Correction Element As An Adjustable Rc-filtermentioning

confidence: 99%

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On the Development of a Compact Acoustic Probe for Pressure Oscillation Measurements in Gas Turbine Engine

Шорин

Gimadiev

Bystrov

2015

Procedia Engineering

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In experimental fine-tuning of aircraft and ground-based gas turbine engines the gas-air line pressure oscillations is a highly informative parameter. Because of high temperatures and vibration levels the pressure sensors do not meet tolerances and thus they are connected to the measuring point by supply channels forming an acoustic probe. The resonant pressure oscillation amplification in the probe, reducing the accuracy of the measurement, occurs if no correction elements are used. Applicable correction elements in the form of long lines are of limited use due to their large size. The authors suggest corrective compact devices capable of measuring the acoustic pressure oscillations by the probe in a wide range of medium pressure. The corrective devices are implemented as a set of capillary channels and a porous MR throttle made of 0,09 mm diameter wire spiral by mold compression regulated by the average acoustic pressure. The technique of selecting parameters and design of the corrective devices are presented herein.

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Section: Correction Element As An Adjustable Rc-filtermentioning

confidence: 99%

“…The authors have already developed the probe for higher medium pressure and temperature conditions in flow duct of gas turbine engine, with 40 m waveguide channel of 6 mm diameter [15]. Due to the acoustic probe's large size and heavy weight it is often impossible to place the probe in the test stand area.…”

Section: Introductionmentioning

confidence: 99%