{"title":"Study of the S-Bend Intake Hammershock Based on Improved Delayed Detached Eddy Simulation","authors":"Qun-Feng Zhang, Pan-Pan Yan, Jun Li, Jun-Qing Lei","volume":132,"journal":"International Journal of Mechanical and Mechatronics Engineering","pagesStart":1866,"pagesEnd":1876,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/10008269","abstract":"
Numerical investigation of hammershock propagation in the S-bend intake caused by engine surge has been conducted by using Improved Delayed Detach-Eddy Simulation (IDDES). The effects of surge signatures on hammershock characteristics are obtained. It was shown that once the hammershock is produced, it moves upward to the intake entrance quickly with constant speed, however, the strength of hammershock keeps increasing. Meanwhile, being influenced by the centrifugal force, the hammershock strength on the larger radius side is much larger. Hammershock propagation speed and strength are sensitive to the ramp upgradient of surge signature. A larger ramp up gradient results in higher propagation speed and greater strength. Nevertheless, ramp down profile of surge signature have no obvious effect on the propagation speed and strength of hammershock. Increasing the maximum value of surge signature leads to enhance in the intensity of hammershock, they approximately match quadratic function distribution law.<\/p>\r\n","references":"[1]\tR. D. Menzies, K. J. Babcock, G. N. Barakos, \u201cSurge Wave Propagation Modelling Using Computational Fluid Dynamics,\u201d in Proc. 21st Applied Aerodynamics Conference, Florida, 2003, pp. 1\u201312.\r\n[2]\tA. P. Kurkov, R. H. Soeder, J. E. Moss, \u201cInvestigation of the stall hammershock at the engine intake,\u201d Journal of Aircraft, vol. 12, no. 4, pp. 198\u2013204, Apr. 1975.\r\n[3]\tA. R. Porro, \u201cOn Hammershock Propagation in a Supersonic Flow Field,\u201d in Proc. 23rd Congress of the International Council of the Aeronautical Sciences, Toronto, 2002, 11-25.\r\n[4]\tY. Zhu, T. R. Shen, \u201cEvaluation Approach of Hammershock Loading for Aircraft Inlet,\u201d Aeroengine, vol. 41, no. 3, pp. 6\u201311, Mar. 2015.\r\n[5]\tB. Goble, S. King, \u201cInlet hammershock analysis using a 3-D unsteady Euler\/Navier-Stokes code,\u201d in Proc. 32nd Joint Propulsion Conference and Exhibit, Florida,1996, pp. 21\u201345.\r\n[6]\tD. R. Webb, H. K. Heron, \u201cThe effect of engine surge on intake-structure loads,\u201d The royal aircraft establishment, London, 1-9, 1979.\r\n[7]\tD. Causon, D. Ingram, \u201cNumerical simulation of engine surge in a twin side-by-side intake system,\u201d The Aeronautical Journal, vol. 25, no. 3, pp. 365\u2013370, Mar. 1997.\r\n[8]\tA. Ytterstorm, E. Axelson, \u201cHammershock Calculations in the Air Intake of JAS 39 GFUPEN, using Dual Timestepping,\u201d in Proc. 17th Applied Aerodynamics Conference, Florida, 1999, pp. 232\u2013251.\r\n[9]\tJ. Blazek, \u201cComputational fluid dynamics principles and applications,\u201d \t2nd ed. Elsevier, London, 2005, pp. 16\u201318.\r\n[10]\tM. L. Shur, R. R. Spalart, M. Strelets, \u201cA hybrid RANS-LES approach with delayed-DES and wall-modelled LES capabilities,\u201d International Journal of Heat and Fluid Flow, vol. 29, pp. 1638\u20131649, July 2008.\r\n[11]\tF. R. Menter, \u201cTwo-equation eddy-viscosity turbulence modeling for engineering applications,\u201d AIAA Journal, vol. 32, pp. 1598-1605, May 1994.\r\n[12]\tM. Strelets, \u201cDetached eddy simulation of massively separated flows,\u201d in Proc. 39th Aerospace Sciences Meeting and Exhibit, Reno, 2001, pp. 132\u2013155.\r\n[13]\tP. R. Spalart, W. H. Jou, M. Strelets, \u201cComments on the feasibility of LES for wings, and on a hybrid RANS\/LES approach,\u201d Advances in DNS\/LES, vol. 15, pp. 4-8, Aug. 1997.\r\n[14]\tP. R. Spalart, S. Deck, M. L. Shur, \u201cA new version of detached eddy simulation, resistant to ambiguous grid densities,\u201d Theoretical and computational fluid dynamics, vol. 20, pp. 181-195, Dec. 2006.\r\n[15]\tS. R. Wellborn, B. A. Reichert, T. H. Okiishi, \u201cAn experimental investigation of the flow in a diffusing S-duct,\u201d in Proc. 28th Joint Propulsion Conference and Exhibit, Nashville, 1992, pp. 1\u201313.\r\n[16]\tS. Berhm, T. Kachele, R. Niehuis, \u201cCFD Investigations on the Influence of varying Inflow Conditions on the Aerodynamics in an S-Shaped Inlet Duct,\u201d AIAA Journal, vol. 51, pp. 462-474, Jul. 2014.\r\n[17]\tM. K. Gopaliya, P. Jain, S. Kumar, \u201cPerformance improvement of s-shaped diffuser using momentum imparting technique,\u201d IOSR Journal of Mechanical and Civil Engineering, vol. 11, pp. 23-31, Mar. 2014.\r\n[18]\tS. ge, R. Cui, \u201cDesign and numerical simulation of submerged s-shaped inlet duct,\u201d Electrical Engineering & Automation, vol. 2, no. 4, pp. 44-51, Apr. 2013.","publisher":"World Academy of Science, Engineering and Technology","index":"Open Science Index 132, 2017"}