Vadim Tokarev

Aircraft noise modelling for environmental assessment around airports

Abstract Various models for predicting aircraft noise around airports are described. Improved acoustic models of aircraft are formed by summing models for the noise sources peculiar to each of the aircraft types. The concept of “noise radius” has been formulated and implemented as a useful alternative to the conventional noise–power–distance relationship. Trajectory noise models have been used to analyse the influence of various operational factors on noise levels. The main procedure for assessment of aircraft noise around an airport is in accordance with the international requirements but each component has been derived in a particular way. Results of noise predictions for certain types of aircraft are presented. Atmospheric conditions are predicted to have an important influence.

Predicted flight procedures for minimum noise impact

Abstract Several problems relating to minimization of aircraft noise impact have been formulated and solved. As part of this work analytical and semi-empirical aircrafts trajectory and noise models have been developed and used. The study results indicate various operational measures for reducing aircraft noise levels under flight paths around airports.. All rights reserved

Acoustics at the kyiv international university of civil aviation

Abstract The results in teaching and research in the field of aviation acoutics at Kyiv International University of Civil Aviation are reviewed. Peculiarities of experimental facilities for acoustic researches are considered. Some specific topics of researches are submitted with their features.

Aircraft noise model corrected by operational and propagation effects

Although there are mathematical models for predicting aircraft noise, the requirements on their accuracy have recently increased. Possibilities for model improvements are reviewed with respect to both noise source generation characteristics and noise propagation effects. The review indicates that the required corrections are not standard since they depend on the physical model of the noise source. The results of aircraft noise assessment for different types of aircraft and for different models of noise propagation are discussed. Recommendations for their use in computational schemes are made. The most rational method generates the required corrections for each type of aircraft according to the operational and noise propagation conditions in a given situation.

Noise from airborne air conditioning system

A prediction model for noise produced by an air conditioning system in an aircraft pressurized compartment is described. It is based on analysis of the sound flow energy in air conditioning system channels, including both the generation attenuation effects of the acoustic oscillations within the system. Differences in calculations from those usually used in stationary air conditioning systems for industrial, public, and residential buildings are discussed. The mechanism of noise generation by compressors, cooling turbine, separated flows in regulator, and jet flows from the pipe nozzle are investigated. The calculation results are obtained and carried out for different operational airplane conditions. Optimum tasks for operation conditions of an air conditioning system for noise impact criterion are formulated and solved.