Numerical Simulation of Supersonic Gas Jet Flows and Acoustics Fields
The source of the jet noise is generated by rocket exhaust plume during rocket engine testing. A domain decomposition approach is applied to the jet noise prediction in this paper. The aerodynamic noise coupling is based on the splitting into acoustic sources generation and sound propagation in separate physical domains. Large Eddy Simulation (LES) is used to simulate the supersonic jet flow. Based on the simulation results of the flow-fields, the jet noise distribution of the sound pressure level is obtained by applying the Ffowcs Williams-Hawkings (FW-H) acoustics equation and Fourier transform. The calculation results show that the complex structures of expansion waves, compression waves and the turbulent boundary layer could occur due to the strong interaction between the gas jet and the ambient air. In addition, the jet core region, the shock cell and the sound pressure level of the gas jet increase with the nozzle size increasing. Importantly, the numerical simulation results of the far-field sound are in good agreement with the experimental measurements in directivity.
 Anjaneyuiu K, Brenton G, David W. Aeroacoustics of a heated Mach 2.0 jet. AIAA 2005-2931.
 Peng XB, Li JM, Hu, CB. Experimental study on jet noise characteristics of solid rocket motor. Journal of Experiments in Fluid Mechanics. 2013;27(1):52~55 (in Chinese).
 Bailly C, Bogey C. Contributions of computational aeroacoustics to jet noise research and prediction. Int J Comput Fluid Dyn 2004;18(6):481-91.
 Cunha G, Redonnet S. Towards a robust and accurate CFD/CAA coupling procedure for hybrid methods in aeroacoustics, Part 1: on the optimization of CFD/CAA coupled calculations. AIAA;2012-2063.
 Mathieu L, Franck C. Analysis of noise radiation mechanisms in hot subsonic jet from a validated large eddy simulation solution. Physics of Fluids 2015;27(7).
 Papamoschou D, Morris PJ, Mclaughlin DK. Beamformed flow-acoustic correlations in a supersonic jet. AIAA J 2010; 48(10):2445-2453.
 Morris PJ, Mclaughlin DK, Kuo CW. Noise reduction in supersonic jets by nozzle fluidic inserts. J sound and vib 2013, 332:3992-4003.
 Koh S, Schroder W, Meinke M. Noise sources in heated coaxial jets. Computers&Fluids 2013; 78:24-28.
 Koh S, Schroder W, Meinke M. Turbulence and heat excited noise sources in single and coaxial jets. J Sound Vib 2010; 329:786-803.
 Fu DB, Yu Y, Niu QL Simulation of underexpanded supersonic jet flows with chemical reactions. Chinese Society of Aeronautics and Astronautics 2014, 27(3):505-513.
 Bodony D, Lele SK. Current status of jet noise predictions using large-eddy simulation. AIAA J 2008;46(2).
 Depuru NK, Dowling AP. Acoustic sources and far-field noise of chevron and round jets. AIAA J 2015;53(9).
 Xia H, Tucker PG. Numerical simulation of single-stream jets from a serrated nozzle. Flow Turbulence Combust 2012, 88:3-18.
 Sipatov AM, Usanin MV, Chuhlantseva NO. Applying fluent software for jet noise generation modeling. AIAA 2010-3843.
 Daniel C, Bhupatindra M. The response of supersonic jet noise components to fluidic injection parameters. AIAA 2013-2196.
 Xu CY, Chen LW, Lu XY. Large-eddy simulation of the compressible flow past a way cylinder. J. Fluid Mech. 2010; 665:238-273.