Application of 3-signal coherence to core noise transmission | Zendy

E. A. Krejsa | Zendy

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Application of 3-signal coherence to core noise transmission

Author(s) -

E. A. Krejsa

Publication year - 1983

Publication title -

nasa sti repository (national aeronautics and space administration)

Language(s) - English

Resource type - Conference proceedings

DOI - 10.2514/6.1983-759

Subject(s) - coherence (philosophical gambling strategy) , transmission (telecommunications) , computer science , core (optical fiber) , noise (video) , signal (programming language) , electronic engineering , telecommunications , physics , engineering , artificial intelligence , quantum mechanics , image (mathematics) , programming language

A method for determining transfer functions across turbofan engine components and from the engine to the far-field is developed. The method is based on the three-signal coherence technique used previously to obtain far-field core noise levels. This method eliminates the bias error in transfer function measurements due to contamination of measured pressures by nonpropagating pressure fluctuations. Measured transfer functions from the engine to the far-field, across the tailpipe, and across the turbine are presented for three turbofan engines.

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