Estimation of an Object Trajectory in an Intake Duct using Numerical Simulation
Abstract
This research aims to study the trajectory of an object inside a serpentine duct of a gas turbine engine using computational fluid dynamics. The coupled implicit solver with 6-degree of freedom (6-DOF) and chimera mesh (Overset mesh) is used to track the object’s trajectory. Various object orientation and aircraft angle of attack (AoA) at a speed of Mach 0.3 is studied. This provides an understanding of the bird’s movement inside the duct that might cause damage to the engine components during takeoff and landing. It was observed that the combination of AoA and object orientation decide the length of the trajectory before impact. The object is found to travel the farther when the AoA is at -20o with object oriented at 0o and 45o.The object tends pitch and yield to the flow irrespective of its initial orientation and hence the aircraft angle of attack is a more predominant factor. The effect of pressure recovery due to AoA and object orientation is also presented. The recovery is found to be at its best for AoA of 0o irrespective of object orientation. This approach could be utilised for designing an intake duct that can limit the damage to engine components due to bird ingestion and simultaneously maintain good pressure recovery.
References
lijewski, l.E. & Suhs, N.E. Time-accurate computational fluid dynamics approach to transonic store separation trajectory prediction. J. Aircraft, 1994, 31(4), 886-891. https://doi.org/10.2514/3.46575
Ubels, l.C.; Johnson, A.F.; Gallard, J.P. & Sunaric, M. Design and testing of a composite bird strike resistant leading edge. In 24th International SAMPE Europe conference of the Society for the Advancement of Materials and Process Engineering, Paris EXPO, Porte de Versailles, Paris, France, 1-3 April 2003, 1-14. https://reports.nlr.nl/bitstream/handle/10921/607/TP-2003-054.pdf?sequence=1&isAllowed=y [Accessed on 13 September 2019]
Nizampatnam, S.l. Models and methods for bird strike load prediction. Wichita State university, USA, 2007. (PhD Thesis).
Wellborn, R. S.; Reichert, A. B. & Okiishi, H. T. An experimental investigation of the flow in a diffusing S-duct. In 28th Joint Propulsion Conference and Exhibit cosponsored by the AIAA, SAE, ASME, and ASEE, July 6–8, 1992 AIAA 92–3622. https://doi.org/10.2514/6.1992-3622
Zhang, l.; liu, Z. & Jiang, J. A numerical simulation of the flow in a diffusing S-duct inlet. Modern Appl. Sci., 3(4), 2009, 111-116. https://doi.org/10.5539/mas.v3n4p111
Kachele, T.; Schneider, T. & Niehuis, R. Steady and unsteady numerical simulation of a bent intake geometry. Springer International Publishing, Ag 2018, 15-25. https://doi.org/10.1007/978-3-319-64519-3_2
Aref, P.; ghoreyshi, M.; Jirasek, A. & Satchell, J.M. CFD validation and flow control of RAE-M2129 S-duct diffuser using CREATETM-AV kestrel simulation tools. Aerospace, 2018, 31(5), 1-23. https://doi.org/10.3390/aerospace5010031
Steger, J.l.; Dougherty, F.C. & benek, J.A. A chimera grid scheme. Advances in grid generation, ASME FED 5(1), June, 1983.
Where otherwise noted, the Articles on this site are licensed under Creative Commons License: CC Attribution-Noncommercial-No Derivative Works 2.5 India