Numerical study on flow-induced noise for a steam stop-valve using large eddy simulation

Abstract

The noise induced by the fluctuant saturated steam flow under 250 °C in a stop-valve was numerically studied. The simulation was carried out using computational fluid dynamics (CFD) and ACTRAN. The acoustic field was investigated with Lighthill’s acoustic analogy based on the properties of the flow field obtained using a large-eddy simulation that employs the LES-WALE dynamic model as the sub-grid-scale model. Firstly, the validation of mesh was well conducted, illustrating that two million elements were sufficient in this situation. Secondly, the treatment of the steam was deliberated, and conclusions indicate that when predicting the flow-induced noise of the stop-valve, the steam can be treated as incompressible gas at a low inlet velocity. Thirdly, the flow-induced noises under different inlet velocities were compared. The findings reveal it has remarkable influence on the flow-induced noises. Lastly, whether or not the heat preservation of the wall has influence on the noise was taken into account. The results show that heat preservation of the wall had little influence.

Keywords

flow-induced noise / steam stop-valve / flow field / sound field / large eddy simulation (LES) / computational fluid dynamics (CFD) / ACTRAN

References

[1] Anderson N, Eriksson L, Davidson L. Investigation of an isothermal Mach 0.75 jet and its radiated sound using large-eddy simulation and Kirchhoff surface integration. International Journal of Heat and Fluid Flow, 2005, 26(3): 393-410

[2] Bogey C, Bailly C. Computation of a high Reynolds number jet and its radiated noise using large eddy simulation based on explicit filtering. Computers & Fluids, 2006, 35(10): 1344-1358

[3] Cavalieri AVG, Daviller G, Comte P, Jordan P, Tadmor G, Gervais Y. Using large eddy simulation to explore sound-source mechanisms in jets. Journal of Sound and Vibration, 2011, 330(17): 4098-4113

[4] Germano M, Piomelli U, Moin P, Cabot WH. A dynamic sub-grid-scale eddy viscosity model. Physics of Fluids, 1991, 3(7): 1760-1765

[5] Kim HJ, Lee S, Fujisawa N. Computation of unsteady flow and aerodynamic noise of NACA0018 airfoil using large-eddy simulation. International Journal of Heat and Fluid Flow, 2006, 27(2): 229-242

[6] Lele SK, Mendez S, Ryu J, Nichols J, Shoeybi M, Moin P. Sources of high-speed jet noise: Analysis of LES data and modeling. Procedia Engineering, 2010, 6: 84-93

[7] Lilly DK. A proposed modification of the Germano sub-grid-scale closure method. Physics of Fluids, 1992, 4(3): 633-635

[8] Lu FA, Qi DT, Wang XJ, Zhou Z, Zhou HH. A numerical optimization on the vibroacoustics of a centrifugalfan volute. Journal of Sound and Vibration, 2012, 331(10): 2365-2385

[9] Nicoud F, Ducros F. Sub-grid-scale stress modeling based on the square of the velocity gradient tensor. Flow, Turbulence and Combustion, 1999, 62(3): 183-200

[10] Sandberg RD, Carol S, Ploumhans P, Ambs R, Schillemeit B, Washburn KB, Shakib F. Validation of a CAA formulation based on Lighthill’s Analogy using AcuSolve and ActranLA on an Idealized Automotive HVAC Blower and on an axial fan. 12th AIAA/CEAS Aeroacoustics Conference, (Collection of Technical Papers), Cambridge, USA, 2006, 3795-3812

[11] Scheit C, Karic B, Becker S. Effect of blade wrap angle on efficiency and noise of small radial fan impellers-A computational and experimental study. Journal of Sound and Vibration, 2012, 331(5): 996-1010

[12] Shur ML, Spalart PR, Strelets MK. LES-based evaluation of a microjet noise reduction concept in static and flight conditions. Procedia Engineering, 2010, 6: 44-53

[13] Si HQ, Shen WZ, Zhu WJ. Effect of non-uniform mean flow field on acoustic propagation problems in computational aeroacoustics. Aerospace Science and Technology, 2013, 28(1): 145-153

[14] Xia H, Tucker PG, Eastwood S. Large-eddy simulations of chevron jet flows with noise predictions. International Journal of Heat and Fluid Flow, 2009, 30(6): 1067-1079

[15] Zhang N, Shen H, Yao H. Numerical simulation of cavity flow induced noise by LES and FW-H acoustic analogy. Journal of Hydrodynamics, 2010, 22(5): 242-247