Influence of free stream effects on jet noise generation and propagation within the Goldstein acoustic analogy approach for fully turbulent jet inflow boundary conditions
SA Karabasov, RD Sandberg
International Journal of Aeroacoustics | Multi-Science Publishing | Published : 2015
© Multi-Science Publishing. Sound generation and propagation by low-Reynolds number turbulent jets from a DNS database is modelled using the Goldstein acoustic analogy method. In comparison with previous work, the DNS data feature fully resolved turbulent boundary layers at the pipe nozzle exit and include the free-stream flow to study the influence of coflow on effective noise sources. To investigate the statistics of turbulent sources, fourth-order correlation analysis is applied to the DNS data. The results are in reasonable agreement with the conventional Gaussian turbulence statistics source model. For meanflow sound propagation modelling, adjoint linearised Euler equations are solved i..View full abstract
Awarded by Royal Academy of Engineering/EPSRC research fellowship
Awarded by UK turbulence consortium under EPSRC
Awarded by Engineering and Physical Sciences Research Council
The work of SK has been supported by the Royal Society of London and Aero Acoustics Research Consortium. The second author was partly supported by a Royal Academy of Engineering/EPSRC research fellowship (EP/E504035/1) and part of the DNS computing time was provided by the UK turbulence consortium under EPSRC grant EP/G069581/1.