Description
Areas of application
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Determination of acoustic mode distributions in pipe systems and turbomachinery
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Application in various geometries, both in non-flowing areas and in ducts with uniform or swirling flow
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Noise reduction through analysis and optimization of silencers and other acoustic systems
Functionality
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Measurement variables: sound pressure frequency, blade change frequency, circumferential and radial amplitudes, phase, radial and circumferential mode order
- Measurement principle:
- Wall-flush microphones record sound pressures at various circumferential and axial positions
- Fourier analysis (FFT) identifies azimuthal orders of the sound pressure modes
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Solution of linear systems of equations calculates radial mode orders
- Measurement setup:
- The number of microphones determines the maximum detectable mode order
- Combination of microphone positions in circumferential and axial direction for comprehensive data acquisition
Properties
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Precise analysis of complex sound fields through high-resolution data evaluation
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Flexible application for different flow conditions and geometries thanks to customizable measurement setups
