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ESDU Engineer

Issue 08


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

Issue Table of Contents

Elasto-plastic buckling of flat isotropic stiffened panels and struts in compression

VGK Aerofoil Code for Windows

Data Item 01002 - The use of Data Items on cam design

Computer-based estimation procedure for single-stream jetnoise

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

MMDH - How it all works

Fracture toughness values of some cast irons

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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