Effects of Porous Parameters on the Aerodynamic Noise of the Blowing Device of Guardrails

Document Type : Regular Article


Department of Mechanical and Electronic Engineering, Shandong University of Science and Technology, Qingdao, 266590, China



To solve the problem of the strong noise generated in the galvanizing process on the surface of the guardrail board, optimal design of the outlet structure of the blowing device is carried out according to the sound absorption and noise reduction theory of microperforated plates. The aerodynamic characteristics and aerodynamic noise analysis of the blowing device are investigated by large eddy simulation with dynamic grid technology. The oblique surface of the outlet is processed with blind holes, and then the influence of blind holes on the aerodynamic noise of the blowing device is explored, including different shapes, porosities and depths. The spectral study reveals that when the guardrail board just enters the blowing device, there is greater noise compared to other working conditions. The place with the highest noise sound pressure level (SPL) is at the outlet of the blowing device at the monitoring point of R=1 m and the direction of 90°. The SPLs of the monitoring points at 0° and 180° are smaller than those in other directions, while the SPL distribution of the monitoring points in other directions is relatively even. Compared with the original blowing device, the best noise reduction performance is achieved when the blowing device has cylindrical holes, with a porosity of 10% and a hole depth of 3 mm. The noise reduction value reaches up to 28.4 dB. In addition, an aerodynamic noise test was carried out on the blowing device in the corrugated board galvanizing workshop to demonstrate the correctness of the results of the numerical simulation.


Anyoji, M. and I. Tabaru (2017). Effect of boundary layer trip on reduction of jet noise in over-expanded nozzle flow. Journal of Thermal Science 26(5), 448-452.##
Barbarino, M., M. Ilsami, R. Tuccillo and L. Federico (2017). Combined CFD-Stochastic analysis of an active fluidic injection system for jet noise reduction. Applied Sciences 7( 623), 1-17.##
Baqui, Y. B., A. Agarwal1, A. V. G. Cavalieri and S. Sinayoko (2015). A coherence-matched linear source mechanism for subsonic jet noise. Journal Fluid Mechanics 776, 235–267.##
Baskaran, K., S. K. Parimalanathan, A. Dhamanekar and K. Srinivasan (2018). Effects of passive grids on pipe and orifice jet noise. Journal of Sound and Vibration 435, 218–233.##
Bychkova, O. P. and G. A. Faranosov (2014). On the possible mechanism of the jet noise intensification near a wing. Acoustical Physics 60(6), 633–646.##
Balakrishnan, P. and K. Srinivasan (2019). Impinging jet noise reduction using non-circular jets. Applied Acoustics 143, 19–30.##
Brehma, C., J. A. Housmanb, C. C. Kiris, M. F. Baradb and F. V. Hutcheson (2017). Four-jet impingement: Noise characteristics and simplified acoustic model. International Journal of Heat and Fluid Flow 67, 43–58.##
Balakrishnan, P.  and K. Srinivasan (2017). Pipe jet noise reduction using co-axial swirl pipe. The Aeronautical Journal 121(1238), 488-514.##
Dahl, M. D. (2015). Turbulence statistics for jet noise source modeling from filtered PIV measurements. Aeroacoustics 14 (3-4), 521 – 552.##
Doty, M. J., T. F. Brooks, C. L. Burley, C. J. Bahr and D. S. Pope (2018). Jet noise shielding provided by a hybrid wing body aircraft. International Journal of Aeroacoustics 17(1–2), 135–158.##
Faranosov, G. and I. Belyaev (2019). Azimuthal structure of low-frequency noise of installed jet. AIAA Journal 57(5), 1885-1898.##
Ilário, C. R. S., M. Azarpeyvand, V. Rosa, R. H. Self and J. R. Meneghini (2017). Prediction of jet mixing noise with lighthill's acoustic analogy and geometrical acoustics. The Journal of the Acoustical Society of America 141(2), 1203-1213.##
Karabasov, S. A. and R. D. Sandberg (2015). Influence of free stream effects on jet noise generation and propagation within the Goldstein acoustic analogy approach for fully turbulent jet inflow boundary conditions. Aeroacoustics 14 (3-4), 413 – 430.##
Koenig, M., K. Sasaki, A. V. G. Cavalieri, P. Jordan and Y. Gervais (2016). Jet-noise control by flfluidic injection from arotating plug: linear and nonlinearsound-source mechanisms. Journal Fluid Mechanics 788, 358–380.##
Lee, H., A. Uzun and M. Y. Hussaini (2017). Identification of jet noise source using causality method based on large-eddy simulation of a round jet flow. International Journal of Aeroacoustics 16(1–2), 78–96.##
Liu, G. Q., T. Zhang, Y. O. Zhang and X. Li (2014). Underwater jet noise simulation based on a Large-Eddy Simulation/Lighthill hybrid method. 168th Meeting of the Acoustical Society of America, 27-31 October, Indianapolis, Indiana, Vol. 22 070005.##
Liu, J. T. C. (2016). Some fundamental considerations of streamwise vortices found useful in mixing enhancement and jet noise suppression. International Journal of Aeroacoustics 15(4–5), 515–525.##
Lee, I., Y. Z. Zhang and D. K. Lin (2019). Experimental investigation of jet noise from a high BPR dual-stream jet in a static model-scale test. Applied Acoustics 150, 246–267.##
Nelson, C. C., A. B. Cain, R. Dougherty, K. S. Brentner and P. J. Morris (2017). Application of synthetic array techniques for improved simulations of hot supersonic jet noise. International Journal of Aeroacoustics 16(4–5), 382–402.##
Pouangué, A. F., M. Sanjosé and S. Moreau (2015). Subsonic jet noise simulations using both structured and unstructured grids. AIAA Journal 53(1), 55-69.##
Pankaj, R. and K. Sunil (2019). Use of downstream fluid injection to reduce subsonic jet noise. International Journal of Aeroacoustics 18(4-5), 554–574.##
Pilon, A. R., R. W. Powers, D. K. McLaughlin and P. J. Morris (2017). Design and analysis of a supersonic jet noise reduction concept. Journal of Aircraft 54(5),1705-1717.##
Semiletov, V. A. and S. A. Karabasov (2017). Similarity scaling of jet noise sources for low-order jet noise modelling based on the Goldstein generalised acoustic analogy. International Journal of Aeroacoustics 16(6), 476–490.##
Semiletov, V. A., P. G. Yakovlev, S. A. Karabasov, G. A. Faranosov and V. F. Kopiev (2016). Jet and jet–wing noise modelling based on the CABARET MILES flow solver and the Ffowcs Williams–Hawkings method. International Journal of Aeroacoustics 15(6–7), 631–645.##
Shur, M. L., P. R. Spalart and M. K. Strelets (2016). Jet noise computation based on enhanced DES formulations accelerating the RANS-to-LES transition in free shear layers. International Journal of Aeroacoustics 15(6–7), 595–613.##
Tester, B. J. and S. Glegg (2018). Phased array transformation methods to estimate non-compact jet noise source characteristics. International Journal of Aeroacoustics 17(4–5), 380–398.##
Viswanathan, K. (2018). Progress in prediction of jet noise and quantification of aircraft/engine noise components. International Journal of Aeroacoustics 17(4–5), 339–379.##
Wei, X. F., R. Mariani, L. P. Chua, H. D. Lim, Z. B. Lu, Y. D. Cui and T. H. New (2019). Mitigation of under-expanded supersonic jet noise through stepped nozzles. Journal of Sound and Vibration 459, 114875.##
Zhang, M. H. and T. P. Chong (2020). Effects of porous trailing edge on aerodynamic noise characteristics. International Journal of Aeroacoustics 19(3–5), 254–271.##
Volume 15, Issue 4
July and August 2022
Pages 1193-1206
  • Received: 06 October 2021
  • Revised: 20 April 2022
  • Accepted: 22 April 2022
  • First Publish Date: 15 May 2022