Prediction of noise generated by fans and compressors in turbojet and turbofan engines

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ESDU Engineer

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Prediction of noise generated by fans and compressors in turbojet and turbofan engines

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Data Item 98008 permits the user to estimate the noise generated by axial-flow fans or compressors in turbojet and turbofan engines with and without inlet guide vanes. Sound pressure levels in one-third octave bands in the frequency range of 50Hz to 10000Hz are calculated for lossless free-field ambient conditions. The main parameters that need to be specified are the mass flow rate, the total temperature rise across a fan stage, the design point and the operating point values of the rotor tip relative inlet Mach number and certain data about the fan geometry.

Dr Cyrus Chinoy is the Group Head responsible for Aircraft Noise and Structural Dynamics. He can be contacted at cbchinoy@esdu.com

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