Helicopter Rotor Rotational Noise Prediction And Correlation Volume Ii Documentation Of Noise Prediction Computer Program

Download or read book Helicopter Rotor Rotational Noise Prediction and Correlation. Volume II. Documentation of Noise Prediction Computer Program written by Ronald G. Schlegel and published by . This book was released on 1970 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: A computer program for rotational noise prediction is documented. The program was developed as a part of a study to develop more accurate methods for predicting rotational noise levels under conditions of nonuniform inflow over the rotor disc. The computer program will calculate the root-mean-square sound pressure level for up to the 10th harmonic of rotor noise at any field point in the near or far field outside of the rotor disc. Noise levels can be calculated either from a rectangular chordwise distribution of pressure or from the measured chordwise distribution. Although the report concentrated on a helicopter rotor, the analytical results are applicable to propellers in general. (Author).