Title: Analysis of turboshaft engine-low power margin

Authors: Dappili Sasindra Reddy; Kosaraju Pavan Kumar; Yetukuri Manikanta; Bodduluri Prasanna Sai; E.T. Chullai

Addresses: Aeronautical Engineering Department, School of Aeronautical Sciences, Hindustan Institute of Technology and Science, Chennai – 603103, India ' Aeronautical Engineering Department, School of Aeronautical Sciences, Hindustan Institute of Technology and Science, Chennai – 603103, India ' Aeronautical Engineering Department, School of Aeronautical Sciences, Hindustan Institute of Technology and Science, Chennai – 603103, India ' Aeronautical Engineering Department, School of Aeronautical Sciences, Hindustan Institute of Technology and Science, Chennai – 603103, India ' Aeronautical Engineering Department, School of Aeronautical Sciences, Hindustan Institute of Technology and Science, Chennai – 603103, India

Abstract: Lower power margin is caused due to heavy tainting's in air path which leads to fouling. This also leads to reduced air flow of compressor which results in lower power; few more reasons for lower power is damage of hot core components like power turbine blades and impeller. Low power margin is defined as reduction of output shaft power below the minimum required power to lift the helicopter. The engine encountered with low power is confirmed by pilot by measuring the torque with corresponding to altitude and ambient temperature. If power loss is within the acceptable limit then compressor wash is carried out through which 25-35% power is regained. After compressor wash if power is not regained then the engine is sent to repair and overhaul division where snag is rectified and sent back to test bed for final analysis. If engine regains the power, then the engine will be dispatched.

Keywords: turboshaft; compression fouling; corrosion; engine testing; low power margin; test bed; turbine blade; power reductions; engine damages.

DOI: 10.1504/IJAIP.2024.142671

International Journal of Advanced Intelligence Paradigms, 2024 Vol.29 No.2/3, pp.248 - 262

Received: 20 Jul 2018
Accepted: 08 Sep 2019
Published online: 15 Nov 2024 *

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