Estimation of an Object Trajectory in an Intake Duct using Numerical Simulation

  • L. Aravinth Department of Mechanical Engineering, Rajalakshmi Engineering College, Chennai - 602 105
  • N. Vidhyashankar DRDO-Gas Turbine Research Establishment, Bengaluru - 560 093
  • Reza Abbas DRDO-Gas Turbine Research Establishment, Bengaluru - 560 093
  • Natteri M. Sudharsan Department of Mechanical Engineering, Rajalakshmi Engineering College, Chennai - 602 105
Keywords: Gas turbine engine, Trajectory, Angle of attack, Overset mesh

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.

Author Biographies

L. Aravinth, Department of Mechanical Engineering, Rajalakshmi Engineering College, Chennai - 602 105

Mr L. Aravinth holds BE (Mechanical Engineering) from Anna University and currently pursuing his MS in the Department of Mechanical Engineering, REC. Currently working as a Junior Research Fellow with the Numerical Engineering and Simulation Lab, at the Rajalakshmi Engineering College, Chennai.

N. Vidhyashankar, DRDO-Gas Turbine Research Establishment, Bengaluru - 560 093

Mr N. Vidhyashankar is presently working as a Scientist in Compressor Group of DRDO-Gas Turbine Research Establishment, Bengaluru. His research interest include : Design of axial and centrifugal compressors, testing of compressors, design and analysis of intake ducts, aircraft-engine integration, fluid-structure interaction etc.

Reza Abbas, DRDO-Gas Turbine Research Establishment, Bengaluru - 560 093

Mr Reza Abbas is presently working as a Scientist in Compressor Group of DRDO-Gas Turbine Research Establishment, Bengaluru and his research interest include design of axial and centrifugal compressors, manufacture, assembly and testing of compressors, complex CFD simulations that include various blade rows of LP and HP spools along with bypass, study of unsteady flows using CFD.

Natteri M. Sudharsan, Department of Mechanical Engineering, Rajalakshmi Engineering College, Chennai - 602 105

Dr Natteri M. Sudharsan PhD from Nanyang Technological University, Singapore and Post doctoral fellowship with Institute of High Performance Computing, A-Star, Singapore. Currently working as a Professor of Mechanical Engineering with Rajalakshmi Engineering College and heads the Numerical Engineering and Simulation Laboratory. His research interests are in computational heat and fluid flow, combustion modeling and medical diagnostic applications using CFD.

Published
2020-02-10
How to Cite
Aravinth, L., Vidhyashankar, N., Abbas, R., & Sudharsan, N. (2020). Estimation of an Object Trajectory in an Intake Duct using Numerical Simulation. Defence Science Journal, 70(1), 10-17. https://doi.org/10.14429/dsj.70.14437
Section
Aeronautical Systems