Study of the S-Bend Intake Hammershock Based on Improved Delayed Detached Eddy Simulation
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.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1314570Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 456
 R. D. Menzies, K. J. Babcock, G. N. Barakos, “Surge Wave Propagation Modelling Using Computational Fluid Dynamics,” in Proc. 21st Applied Aerodynamics Conference, Florida, 2003, pp. 1–12.
 A. P. Kurkov, R. H. Soeder, J. E. Moss, “Investigation of the stall hammershock at the engine intake,” Journal of Aircraft, vol. 12, no. 4, pp. 198–204, Apr. 1975.
 A. R. Porro, “On Hammershock Propagation in a Supersonic Flow Field,” in Proc. 23rd Congress of the International Council of the Aeronautical Sciences, Toronto, 2002, 11-25.
 Y. Zhu, T. R. Shen, “Evaluation Approach of Hammershock Loading for Aircraft Inlet,” Aeroengine, vol. 41, no. 3, pp. 6–11, Mar. 2015.
 B. Goble, S. King, “Inlet hammershock analysis using a 3-D unsteady Euler/Navier-Stokes code,” in Proc. 32nd Joint Propulsion Conference and Exhibit, Florida,1996, pp. 21–45.
 D. R. Webb, H. K. Heron, “The effect of engine surge on intake-structure loads,” The royal aircraft establishment, London, 1-9, 1979.
 D. Causon, D. Ingram, “Numerical simulation of engine surge in a twin side-by-side intake system,” The Aeronautical Journal, vol. 25, no. 3, pp. 365–370, Mar. 1997.
 A. Ytterstorm, E. Axelson, “Hammershock Calculations in the Air Intake of JAS 39 GFUPEN, using Dual Timestepping,” in Proc. 17th Applied Aerodynamics Conference, Florida, 1999, pp. 232–251.
 J. Blazek, “Computational fluid dynamics principles and applications,” 2nd ed. Elsevier, London, 2005, pp. 16–18.
 M. L. Shur, R. R. Spalart, M. Strelets, “A hybrid RANS-LES approach with delayed-DES and wall-modelled LES capabilities,” International Journal of Heat and Fluid Flow, vol. 29, pp. 1638–1649, July 2008.
 F. R. Menter, “Two-equation eddy-viscosity turbulence modeling for engineering applications,” AIAA Journal, vol. 32, pp. 1598-1605, May 1994.
 M. Strelets, “Detached eddy simulation of massively separated flows,” in Proc. 39th Aerospace Sciences Meeting and Exhibit, Reno, 2001, pp. 132–155.
 P. R. Spalart, W. H. Jou, M. Strelets, “Comments on the feasibility of LES for wings, and on a hybrid RANS/LES approach,” Advances in DNS/LES, vol. 15, pp. 4-8, Aug. 1997.
 P. R. Spalart, S. Deck, M. L. Shur, “A new version of detached eddy simulation, resistant to ambiguous grid densities,” Theoretical and computational fluid dynamics, vol. 20, pp. 181-195, Dec. 2006.
 S. R. Wellborn, B. A. Reichert, T. H. Okiishi, “An experimental investigation of the flow in a diffusing S-duct,” in Proc. 28th Joint Propulsion Conference and Exhibit, Nashville, 1992, pp. 1–13.
 S. Berhm, T. Kachele, R. Niehuis, “CFD Investigations on the Influence of varying Inflow Conditions on the Aerodynamics in an S-Shaped Inlet Duct,” AIAA Journal, vol. 51, pp. 462-474, Jul. 2014.
 M. K. Gopaliya, P. Jain, S. Kumar, “Performance improvement of s-shaped diffuser using momentum imparting technique,” IOSR Journal of Mechanical and Civil Engineering, vol. 11, pp. 23-31, Mar. 2014.
 S. ge, R. Cui, “Design and numerical simulation of submerged s-shaped inlet duct,” Electrical Engineering & Automation, vol. 2, no. 4, pp. 44-51, Apr. 2013.