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NUMERICAL ANALYSIS OF THE AERODYNAMIC NOISE PREDICTION IN DNS AND LES - RIGOROUS MATHEMATICAL APPROACH IN AEROACOUSTICS

English, German · Paperback / Softback

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This work presents the rigorous numerical analysis of the aerodynamic noise generation via Lighthill acoustic analogy, which is a non-homogeneous wave equation describing the sound waves. Over more than five decades, the Lighthill analogy was extensively used as one of the major tools in engineering applications in acoustics. However, the first mathematical research of the Finite Element approximation for it is introduced here. Specifically, the focus is on both Direct Numerical and Large Eddy Simulations. The semidiscrete and fully discrete Finite Element methods in DNS are presented. Also, three independent ways of computing the sound power in the semidiscrete case in DNS are introduced. All of these methods are based on the Finite Element scheme. The methods are compared from the point of view of computational cost, accuracy and simplicity. Finally, the concept of Large Eddy Simulation is introduced for aeroacoustic research via Lighthill analogy. Two subgrid scale models are presented for the filtered acoustic analogy. The semidiscrete Finite Elemet Method is analyzed for both. The computational experiments are presented.

About the author










Having graduated from the Mechanics and Mathematics Department of the Moscow State University in 2006 when I was 21, I entered the University of Pittsburgh Graduate School at the Department of Mathematics where I did research on numerical methods applied to aeroacoustics. I was supported by Dr. William Layton (USA), and Dr. Pierre Sagaut (France).

Product details

Authors Alexander Lozovskiy
Publisher LAP Lambert Academic Publishing
 
Languages English, German
Product format Paperback / Softback
Released 24.01.2011
 
EAN 9783838398990
ISBN 978-3-8383-9899-0
No. of pages 132
Subject Natural sciences, medicine, IT, technology > Physics, astronomy > Mechanics, acoustics

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