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[PDF] Top 20 Numerical Modelling of Aerodynamic Noise in Compressible Flows

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Numerical Modelling of Aerodynamic Noise in Compressible Flows

Numerical Modelling of Aerodynamic Noise in Compressible Flows

... Presented in this paper results are the first step into the applications of the in-house CFD code basing on LES method for CAA calculations. Obtained first results show good qualitatively agreement between acoustic wave ... See full document

5

Modelling compressible multiphase flows

Modelling compressible multiphase flows

... of compressible two-phase flow models, detailing closure laws and their main ...two-phase flows in a porous region, and also a class of compressible three-phase flow ...the numerical ... See full document

17

The Numerical Simulation of Aerodynamic Noise Generated by CRH3 Train’s Head Surface

The Numerical Simulation of Aerodynamic Noise Generated by CRH3 Train’s Head Surface

... air flows a certain distance from the train head, the structure of the flow boundary layer tends to be ...the aerodynamic force of the train tends to be ... See full document

8

Simulation of transitional flows through a turbine blade cascade with heat transfer for various flow conditions

Simulation of transitional flows through a turbine blade cascade with heat transfer for various flow conditions

... The numerical simulation of compressible flows in turbo- machinery by means of the RANS approach should be based not only on the advanced turbulence model but also on adequate models of the ... See full document

6

Numerical simulation of turbulent compressible flows in a C-D nozzle with different divergence angles

Numerical simulation of turbulent compressible flows in a C-D nozzle with different divergence angles

... The accuracy of turbulent jet plume prediction significantly depends on the numerical method and turbulence model. Several authors have investigated the effect of different turbulence models on the prediction of ... See full document

8

Direct numerical simulation of noise suppression by water injection in high speed flows

Direct numerical simulation of noise suppression by water injection in high speed flows

... for noise suppression; however, several issues must be ...[direct numerical simulation] studies have advanced to the extent of predicting radiated noise levels from both high subsonic and supersonic ... See full document

11

Numerical simulations of low Mach compressible two-phase flows:
 Preliminary assessment of some basic solution techniques

Numerical simulations of low Mach compressible two-phase flows: Preliminary assessment of some basic solution techniques

... preconditioned compressible flow solver described in Section 3 which is an implicit method with Courant number 20 and Gauss-Seidel solver (50 iterations maximum) ...few numerical evidences (not shown here) ... See full document

18

REVIEW ON VEHICULAR SPEED, DENSITY ESTIMATION AND CLASSIFICATION USING ACOUSTIC SIGNAL

REVIEW ON VEHICULAR SPEED, DENSITY ESTIMATION AND CLASSIFICATION USING ACOUSTIC SIGNAL

... vibrational noise is produced due to contact between tyre threads and road surface texture or the pavement ...the noise (amplification results in tyre noise component in the frequency range 600 Hz to ... See full document

13

Near-wall scaling for incompressible and compressible flows

Near-wall scaling for incompressible and compressible flows

... and compressible flows. It concen- trates on flows with streamwise pressure gradients which render traditional scaling ...incompressible flows a scaling for the velocity profiles is introduced ... See full document

19

Properties of highly nonlinear waves in compressible flows

Properties of highly nonlinear waves in compressible flows

... Having investigated a possible scenario for wave generation in the lower atmosphere, I decided to examine in detail the process by which wave energy can be lost from a propagating highly[r] ... See full document

201

Numerical Investigation on Vortex Structure and Aerodynamic Noise Performance of Small Axial Flow Fan

Numerical Investigation on Vortex Structure and Aerodynamic Noise Performance of Small Axial Flow Fan

... and noise radiation based on vortex sound theory of low speed homentropic flow, and then predicted aerodynamic noise of ...that aerodynamic noise of low speed homentropic flow was ... See full document

9

Computationally Efficient Calculation of Aerodynamic Flows

Computationally Efficient Calculation of Aerodynamic Flows

... • Location of the snapshots in the parameter space is very important, which suggests that a method to select the snapshots position would further increase the computa- tional efficiency. Again, this is currently under ... See full document

6

Online Full Text

Online Full Text

... any numerical instability such as pre- or post-shock ...the numerical results and their respective percentage of errors from the analytical values ... See full document

6

The existence of stationary star solutions for compressible magnetohydrodynamic flows

The existence of stationary star solutions for compressible magnetohydrodynamic flows

... In this paper, we are concerned with the compressible Euler-Poisson system coupled to a magnetic field in the three-dimensional space. Based on a variational method and the exact expression of the Green’s function ... See full document

13

Sound Source Localisation for a High-Speed Train and Its Transfer Path to Interior Noise

Sound Source Localisation for a High-Speed Train and Its Transfer Path to Interior Noise

... In summary, it is obvious that there are many researches on sound sources and noise transfer paths. However, for high-speed trains, there is still a lack of joint analysis of interior sources and exterior sources, ... See full document

16

Issues in the design of switched linear systems: a benchmark study

Issues in the design of switched linear systems: a benchmark study

... deviation of the rate of change of the pitch angle reflects the actuator activity over the medium and long term and is required to remain less than (0.4V-1.8) deg/s over the operating range of mean wind speeds up to 24 ... See full document

29

Numerical modelling of mud volcanoes and their flows using constraints from the Gulf of Cadiz

Numerical modelling of mud volcanoes and their flows using constraints from the Gulf of Cadiz

... the modelling, applied to conical-shaped mud volcanoes in the Gulf of Cadiz, predict an evolution in which the outermost flows are the oldest and thickest, and successively higher, flows are younger, ... See full document

26

Existence and Uniqueness of the Navier-Stokes Problem for Compressible Flows

Existence and Uniqueness of the Navier-Stokes Problem for Compressible Flows

... behavior of motion for compressible flows. There Navier-Stokes equations in the general case represent the evolution of the governing distribution functions, which depend on the velocity vector in the ... See full document

6

Stratified Kelvin–Helmholtz turbulence of compressible shear flows

Stratified Kelvin–Helmholtz turbulence of compressible shear flows

... the Eulerian hydrodynamic conservation laws implemented through an implicit large eddy simulation (ILES) method- ology (Passot et al., 1988; Blaisdell et al., 1993). This is because it is commonly accepted that an ILES ... See full document

20

The critical state of compressible swirling flows

The critical state of compressible swirling flows

... 0.9035 to 0.9283 as the pipe non-dimensional length L increases from 1 and tends to infinity. This result matches with the numerical computations of Rusak & Lee (2002). Results are concluded in section 5. ... See full document

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