Open AccessA Numerical Investigation Into the Nozzle Flow of High By-Pass Turbofans
Author(s) -
Horst Zimmermann,
K. Katheder,
A. Jula
Publication year - 1992
Publication title -
volume 2: aircraft engine; marine; microturbines and small turbomachinery
Language(s) - English
Resource type - Conference proceedings
DOI - 10.1115/92-gt-010
Subject(s) - nozzle , discharge coefficient , thrust , mechanics , flow (mathematics) , static pressure , mechanical engineering , materials science , aerospace engineering , physics , engineering
Numerical investigations for the interacting flow fields of primary and secondary nozzles confirm, that for high by-pass turbofans there is a strong influence of the fan flow on the discharge and thrust coefficients of the core nozzle and of the fan afterbody shape on the coefficients of the fan nozzle. After a review of standard methods two new parameters to correlate the thrust of different concepts are proposed and investigations into flight conditions are put forward. Several nozzle coefficients derived from the integrated velocity profiles and the static pressure field are necessary to assess the quality of nozzle flow.