Large Eddy Simulation and Hilbert Huang Transform for fluctuation pressure of high speed train

Author

Yanan Wang ; Chunju Chen ; Hongyang He

Author_Institution

Sch. of Mech. Eng., Southwest Jiaotong Univ., Chengdu, China

fYear

2015

fDate

11-14 May 2015

Firstpage

284

Lastpage

288

Abstract

Fluctuation pressure acting on the surface of high speed trains is the main source of aerodynamic noise. Therefore, it becomes very important to research components of the fluctuation pressure for controlling the aerodynamic noise. In this paper, Large Eddy Simulation (LES) method is applied to calculate the fluctuation pressure acting on a certain type of CRH high speed train and the distribution rule of the fluctuation pressure is studied by Hilbert Huang Transform (HHT) method. Both the fluctuating part and the average part from the surface pressure are extracted by Empirical Mode Decomposition (EMD). A comparison of the distribution rules for fluctuation pressure at two different speed levels is made.

Keywords

Hilbert transforms; aerodynamics; fluctuations; mechanical engineering computing; noise abatement; pressure measurement; railways; CRH high speed train surface; EMD; HHT method; Hilbert Huang transform; LES method; aerodynamic noise control; empirical mode decomposition; fluctuation pressure distribution rule; large eddy simulation method; Aerodynamics; Computational modeling; Fluctuations; Noise; Pressure measurement; Surface treatment; Transforms; Hilbert Huang Transform; Large Eddy Simulation; fluctuation pressure; high speed train;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation and Measurement Technology Conference (I2MTC), 2015 IEEE International

Conference_Location

Pisa

Type

conf

DOI

10.1109/I2MTC.2015.7151280

Filename

7151280