Hot corrosion failure in the first stage nozzle of a gas turbine engine |
| |
| Affiliation: | 1. Department of Mechanical Engineering, Dezfoul Branch, Islamic Azad University, Dezfoul, Iran;2. Department of Mechanical Engineering, University of Zanjan, Zanjan, Iran;3. Department of Mechanical Engineering, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran;4. Department of Material Science and Engineering, Dezfoul Branch, Islamic Azad University, Dezfoul, Iran;1. The Flow Induced Corrosion Institution, Zhejiang Sci-Tech University, Hanzhou 310018, China;2. China Shenhua coal to liquid and chemical Co., Ltd., Ordos 017000, China;3. National Quality Supervision and Inspection Center of Pneumatic Products, Fenghua 315500, China;1. Department of Materials Science and Engineering, Bandar Abbas Branch, Islamic Azad University, Bandar Abbas, Iran;2. Department of Materials Science and Engineering, Shiraz Branch, Islamic Azad University, Shiraz, Iran;3. Technical Inspection Department, Bandar Abbas Oil Refining Company, Iran;1. Mechanical Engineering Department, Institute of Space technology;2. Material Science and Engineering Department:Institute of Space technology;3. Mechanical Engineering Department, UET lahore |
| |
| Abstract: | First-stage nozzles of gas turbines, which are the first elements after the combustion chamber, encounter hot gases from the combustion process and have the task of directing the fluid path and increasing the velocity of combustion products. This paper reports on the incidence and failure of the first-stage nozzles of a gas turbine in September 2013 at a seaside pump-house located in the South-West of Iran. The nozzle was made of nickel-based superalloy Nimonic105. Due to nozzle failure, the turbine was damaged severely. The cause of nozzle failure was investigated. The results of visual inspection, XRD analysis of deposits on the blade airfoil, SEM images and EDAX analysis showed the characteristics of hot corrosion. Finite-element analysis (FEM) revealed that the cause of blade trailing edge failure was thermal stress leading to thermal fatigue, which accelerated nozzle blade failure in addition to the hot corrosion. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
