Oxide Conditioner, Alkaline Permanganate, Aircraft Turbine Engine Components

Abstract TIMETAL 829 is a Ti-5.5Al-3.5Sn-3Zr-1Nb-0.25Mo-0.3Si near-alpha titanium alloy that is weldable and has high strength and is a creep resistant high temperature alloy. The major application is as gas turbine engine components. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as fracture toughness, creep, and fatigue. It also includes information on forming and heat treating. Filing Code: TI-118. Producer or source: Timet.

Life assessment of a high temperature probe designed for performance evaluation and health monitoring of an aero gas turbine engine

International Journal of Turbo and Jet Engines ◽

10.1515/tjeng-2020-0037 ◽

2020 ◽

Vol 0 (0) ◽

Author(s):

Benny George ◽

Nagalingam Muthuveerappan

Keyword(s):

Performance Evaluation ◽

Gas Turbine ◽

Health Monitoring ◽

Gas Turbine Engine ◽

Life Assessment ◽

Exhaust Gas ◽

Cycle Fatigue ◽

Creep Life ◽

Turbine Engine ◽

Engine Components

AbstractTemperature probes of different designs were widely used in aero gas turbine engines for measurement of air and gas temperatures at various locations starting from inlet of fan to exhaust gas from the nozzle. Exhaust Gas Temperature (EGT) downstream of low pressure turbine is one of the key parameters in performance evaluation and digital engine control. The paper presents a holistic approach towards life assessment of a high temperature probe housing thermocouple sensors designed to measure EGT in an aero gas turbine engine. Stress and vibration analysis were carried out from mechanical integrity point of view and the same was evaluated in rig and on the engine. Application of 500 g load concept to clear the probe design was evolved. The design showed strength margin of more than 20% in terms of stress and vibratory loads. Coffin Manson criteria, Larsen Miller Parameter (LMP) were used to assess the Low Cycle Fatigue (LCF) and creep life while Goodman criteria was used to assess High Cycle Fatigue (HCF) margin. LCF and HCF are fatigue related damage from high frequency vibrations of engine components and from ground-air-ground engine cycles (zero-max-zero) respectively and both are of critical importance for ensuring structural integrity of engine components. The life estimation showed LCF life of more than 4000 mission reference cycles, infinite HCF life and well above 2000 h of creep life. This work had become an integral part of the health monitoring, performance evaluation as well as control system of the aero gas turbine engine.

Life assessment of a high temperature probe designed for performance evaluation and health monitoring of an aero gas turbine engine

International Journal of Turbo and Jet Engines ◽

10.1515/tjj-2020-0037 ◽

2020 ◽

Vol 0 (0) ◽

Author(s):

Benny George ◽

Nagalingam Muthuveerappan

Keyword(s):

Performance Evaluation ◽

Gas Turbine ◽

Health Monitoring ◽

Gas Turbine Engine ◽

Life Assessment ◽

Exhaust Gas ◽

Cycle Fatigue ◽

Creep Life ◽

Turbine Engine ◽

Engine Components

Abstract Temperature probes of different designs were widely used in aero gas turbine engines for measurement of air and gas temperatures at various locations starting from inlet of fan to exhaust gas from the nozzle. Exhaust Gas Temperature (EGT) downstream of low pressure turbine is one of the key parameters in performance evaluation and digital engine control. The paper presents a holistic approach towards life assessment of a high temperature probe housing thermocouple sensors designed to measure EGT in an aero gas turbine engine. Stress and vibration analysis were carried out from mechanical integrity point of view and the same was evaluated in rig and on the engine. Application of 500 g load concept to clear the probe design was evolved. The design showed strength margin of more than 20% in terms of stress and vibratory loads. Coffin Manson criteria, Larsen Miller Parameter (LMP) were used to assess the Low Cycle Fatigue (LCF) and creep life while Goodman criteria was used to assess High Cycle Fatigue (HCF) margin. LCF and HCF are fatigue related damage from high frequency vibrations of engine components and from ground-air-ground engine cycles (zero-max-zero) respectively and both are of critical importance for ensuring structural integrity of engine components. The life estimation showed LCF life of more than 4000 mission reference cycles, infinite HCF life and well above 2000 h of creep life. This work had become an integral part of the health monitoring, performance evaluation as well as control system of the aero gas turbine engine.

Diagnosis of Turbine Engine Transient Performance With Model-Based Parameter Estimation Techniques

Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; General ◽

10.1115/94-gt-317 ◽

1994 ◽

Cited By ~ 1

Author(s):

Jeff W. Bird ◽

Howard M. Schwartz

Keyword(s):

Gas Turbine ◽

Test Data ◽

Physical Models ◽

Turbine Engine ◽

Robustness To Noise ◽

Linear Effects ◽

Diagnostic Capabilities ◽

Engine Components ◽

And Control ◽

Parameter Estimation Techniques

This review surveys knowledge needed to develop an improved method of modelling the dynamics of gas turbine performance for fault diagnosis applications. Aerothermodynamic and control models of gas turbine processes are examined as complementary to models derived directly from test data. Extensive, often proprietary data are required for physical models of components, while system identification (SI) methods need data from specially-designed tests. Current methods are limited in: tuning models to test data, non-linear effects, component descriptions in SI models, robustness to noise, and inclusion of control systems and actuators. Conclusions are drawn that SI models could be formulated, with parameters which describe explicitly the functions of key engine components, to offer improved diagnostic capabilities.

Plating turbine engine components

Metal Finishing ◽

10.1016/s0026-0576(99)80314-6 ◽

1999 ◽

Vol 97 (2) ◽

pp. 115-116

Keyword(s):

Turbine Engine ◽

Engine Components

Life Prediction for Turbine Engine Components

Fatigue ◽

10.1007/978-1-4899-1736-2_18 ◽

1983 ◽

pp. 353-375 ◽

Cited By ~ 2

Author(s):

T. Nicholas ◽

J. M. Larsen

Keyword(s):

Life Prediction ◽

Turbine Engine ◽

Engine Components

An Integrated Approach for Gas Turbine Engine Simulation

10.1115/imece2000-1349 ◽

2000 ◽

Author(s):

Zhiwu Xie ◽

Ming Su ◽

Shilie Weng

Keyword(s):

Gas Turbine ◽

Local Area Network ◽

Integrated Approach ◽

Local Area ◽

Gas Turbine Engine ◽

Future Research ◽

Area Network ◽

Turbine Engine ◽

Engine Simulation ◽

Engine Components

Abstract The static and transient performance of a gas turbine engine is determined by both the characteristics of the engine components and their interactions. This paper presents a generalized simulation framework that enables the integration of different component and system simulation codes. The concept of engine simulation integration and its implementation model is described. The model is designed as an object-oriented system, in which various simulation tasks are assigned to individual software components that interact with each other. A new design rationale called “message-based modeling” and its resulting class structure is presented and analyzed. The object model is implemented within a heterogeneous network environment. To demonstrate its flexibility, the codes that deal with different engine components are separately programmed on different computers running various operating systems. These components communicate with each other via a CORBA compliant ORB, which simulates the overall performance of an engine system. The resulting system has been tested on a Local Area Network (LAN) to simulate the transient response of a three-shaft gas turbine engine, subject to small fuel step perturbations. The simulation results for various network configurations are presented. It is evident that in contrast to a standalone computer simulation, the distributed implementation requires much longer simulation time. This difference of simulation efficiency is analyzed and explained. The limitations of this endeavor, along with some future research topics, are also reported in this paper.