Development of Ceramic Turbocharger Rotors for High-Temperature Use

1993 ◽  
Vol 115 (1) ◽  
pp. 23-29 ◽  
Author(s):  
H. Kawase ◽  
K. Kato ◽  
T. Matsuhisa ◽  
T. Mizuno
Keyword(s):  
High Temperature ◽  
Silicon Nitride ◽  
Mechanical Strength ◽  
Impact Resistance ◽  
Exhaust Gas ◽  
Gas Temperature ◽  
High Mechanical Strength ◽  
Foreign Object Damage ◽  
Exhaust Gas Temperature ◽  
The Impact

A ceramic turbocharger rotor (CTR) for high-temperature use has been developed. The features of this rotor are the use of silicon nitride, which maintains high mechanical strength up to 1200°C, and a new joining technique between the ceramic rotor and its metal shaft. The CTR is expected to cope with stoichiometric mixture burning engines, which produce a higher exhaust gas temperature for fuel economy, and the impact resistance of the rotor against foreign object damage (FOD) has been markedly increased, over that of earlier rotors, resulting in higher reliability. This paper describes the development of ceramic turbocharger rotors for high-temperature use, focusing on the mechanical strength of silicon nitride and the joining of the ceramic rotor and its metal shaft.

scholarly journals Development of Ceramic Turbocharger Rotors for High Temperature Use

1991 ◽  
Author(s):  
Hiroyuki Kawase ◽  
Tadaaki Matsuhisa ◽  
Kiminari Kato ◽  
Takeyuki Mizuno
Keyword(s):  
High Temperature ◽  
Silicon Nitride ◽  
Mechanical Strength ◽  
Impact Resistance ◽  
Exhaust Gas ◽  
Gas Temperature ◽  
High Mechanical Strength ◽  
Foreign Object Damage ◽  
Exhaust Gas Temperature ◽  
The Impact

A ceramic turbocharger rotor (CTR) for high temperature use has been developed. The features of this rotor are the use of silicon nitride which maintains high mechanical strength up to 1,200 °C and a new joining technique between the ceramic rotor and its metal shaft. The CTR is expected to cope with stoichiometrical mixture burning engines which produce a higher exhaust gas temperature for fuel economy, and the impact resistance of the rotor against foreign object damage (FOD) has been markedly increased, over that of earlier rotors, resulting in higher reliability. This paper describes the development of ceramic turbocharger rotors for high temperature use focusing on the mechanical strength of silicon nitride and the joining of the ceramic rotor and its metal shaft.

Impact of Oxygenated Additives on Performance Characteristics of Methyl Ester in IC Engine

2016 ◽  
Vol 852 ◽  
pp. 724-728 ◽  
Author(s):  
D. Yuvarajan ◽  
K. Pradeep ◽  
S. Magesh Kumar
Keyword(s):  
Thermal Efficiency ◽  
Butyl Alcohol ◽  
Exhaust Gas ◽  
Gas Temperature ◽  
Compression Ignition Engine ◽  
Ic Engine ◽  
Oxygenated Additives ◽  
Lower Viscosity ◽  
Exhaust Gas Temperature ◽  
The Impact

In this present work, the impact of blending n-butyl alcohol, a next generation biofuel with jatropha biodiesel on the performance of a diesel engine are examined. Tests were performed on a constant speed compression ignition engine using n-butyl alcohol / jatropha biodiesel blends. N-butyl alcohol was added to jatropha biodiesel by 10, 20 and 30% by volume. Performance parameters namely break thermal efficiency (BTE), Brake specific fuel consumption (BSFC) and Exhaust gas temperature (EGT) were analyzed in this work. It was experimentally found that by adding n-butyl alcohol to neat jatropha biodiesel, significant reduction in viscosity was observed. In addition, break thermal efficiency was increased by 0.8 % due to improved atomization of the blends. Further, brake specific fuel and exhaust gas temperature was further reduced due to lower viscosity and improved combustion rate with addition of n-butyl alcohol to jatropha biodiesel.

scholarly journals Signal filtering method of the fast-varying diesel exhaust gas temperature

2018 ◽  
Vol 175 (4) ◽  
pp. 48-52
Author(s):  
Patrycja PUZDROWSKA
Keyword(s):  
Diesel Exhaust ◽  
Exhaust Gas ◽  
Gas Temperature ◽  
Engine Exhaust ◽  
Temperature Changes ◽  
Filtering Method ◽  
Significant Parameter ◽  
Mathematical Processing ◽  
Exhaust Gas Temperature ◽  
The Impact

The paper presents the problem of the impact of external distortions originating on laboratory test stands on the results of measurements of fast-varying diesel exhaust gas temperature. It has been stressed how significant the aspect of the test stand adaptation is during an experiment to ensure the smallest possible impact. This paper, however, focuses on the methods of mathematical processing of a signal recorded during experimental research of a real object. The most significant parameter requiring filtering is the fast-varying exhaust gas temperature in the engine exhaust channel. Methods of mathematical processing adequate to this type of distorted signal have been presented, particularly those that can be used in the Matlab environment and consisting in averaging of the obtained curves of temperature changes. The results of the application of these methods have also been presented on actual curves recorded during laboratory tests and their evaluation has been made.

scholarly journals Mathematical Modeling of the Working Conditions of the Ship’s Utilization Boiler in Order to Evaluate Its Performance

Energies ◽  
2019 ◽  
Vol 12 (16) ◽  
pp. 3105
Author(s):  
Tomasz Tuński ◽  
Cezary Behrendt ◽  
Marcin Szczepanek
Keyword(s):  
Mathematical Model ◽  
Flow Resistance ◽  
Saturated Steam ◽  
Exhaust Gas ◽  
Gas Temperature ◽  
Limit Values ◽  
Power Load ◽  
Boiler Tubes ◽  
Exhaust Gas Temperature ◽  
The Impact

The paper presents a mathematical model allowing the determination of the amount of saturated steam produced in marine water tube boilers and smoke tube boilers. The mathematical model includes the impact of the exhaust gas temperature and its amount, ambient temperature, engine power load, and location of boiler tubes. In addition to the amount of steam generated in a boiler, it is also feasible to establish flow resistance of the exhaust gas in the boiler determined by the boiler tubes’ arrangement and the thickness of scale deposits and the exhaust gas temperature after the exhaust gas boiler. Due to the model universality, it may be applied not only to make calculations for existing boilers, but also to perform numerical experiments in order to determine the amount of steam produced by the entire range of boilers used in the waste heat recovery systems in power marine systems and the adopted limit values, such as exhaust gas flow resistance and their temperature, after the boiler. The reliability of the obtained results has been revised by comparing them with the outcomes of the experiments performed on the ships.

scholarly journals Error Estimation of Measured Exhaust Gas Temperature in Afterburner Mode in an Aero Gas Turbine Engine

2022 ◽  
Vol 72 (1) ◽  
pp. 10-17
Author(s):  
Benny George ◽  
N. Muthuveerappan
Keyword(s):  
High Temperature ◽  
Error Estimation ◽  
Exhaust Gas ◽  
Gas Temperature ◽  
Turbofan Engine ◽  
Velocity Error ◽  
Temperature Probe ◽  
Exhaust Gas Temperature ◽  
Radiation Error ◽  
Conduction Error

In a turbofan engine, thrust is a key parameter which is measured or estimated from various parameters acquired during engine testing in an engine testbed. Exhaust Gas Temperature (EGT) is the most critical parameter used for thrust calculation. This work presents a novel way to measure and correct the errors in EGT measurement. A temperature probe is designed to measure EGT in the engine jet pipe using thermocouples. The temperature probe is designed to withstand the mechanical and temperature loads during the operation. Structural analysis at the design stage provided a strength margin of 90% and eigenfrequency margin of more than 20%. Thermal analysis is carried out to evaluate maximum metal temperature. Errors are quite high in high-temperature measurements which are corrected using the available methodologies. The velocity error, conduction error, and radiation error are estimated for the measured temperature. The difference of 97 K between the measured gas temperature and calculated gas temperature from measured thrust is explained. The estimated velocity error is 1 K, conduction error is 3 K, and radiation error is 69 K. Based on the error estimation, the measurement error is brought down to 24 K. After applying the above corrections, the further difference of 24 K between measured and estimated value can be attributed to thermocouple error of +/-0.4% of the reading for class 1 accuracy thermocouple, other parameter measurement errors, and analysis uncertainties. The present work enables the designer to calculate the errors in high-temperature measurement in a turbofan engine.

scholarly journals Measurement of GT exhaust gas temperature by acoustic pyrometry: Preliminary error investigation

2021 ◽  
Vol 312 ◽  
pp. 11011
Author(s):  
Gianluca Caposciutti ◽  
Lorenzo Ferrari
Keyword(s):  
Acoustic Wave ◽  
Sound Propagation ◽  
Time Of Flight ◽  
Optimal Solution ◽  
Exhaust Gas ◽  
Gas Temperature ◽  
Acoustic Emitter ◽  
Set Up ◽  
Exhaust Gas Temperature ◽  
The Impact

Acoustic pyrometry is an interesting technique that may find several useful applications in turbomachinery. It is well known that the speed of sound in a medium is directly related to its temperature. Acoustic pyrometry estimates the temperature of a gas by considering the time of flight of an acoustic wave moving through it. If one acoustic emitter-receiver couple is used, only the average temperature along the acoustic path can be determined. If multiple emitter-receiver couples laying on the same plane are used, a reconstruction of the temperature map in the section is possible. In this last case, the analysis is based on the fact that the temperature of each sub portion of the section affects the time of flight of all the acoustic paths travelling across it. Many parameters affect the accuracy of the measurement. They are mainly related to the physic of the sound propagation in a medium, the accuracy of the instrumentation used, the interaction between the acoustic wave and the flow velocity and the hardware set-up. In this study, the impact of the measurement set up of an acoustic pyrometry for the measurement of the exhaust gas temperature in a gas turbine was investigated to determine the optimal solution in terms of accuracy and robustness to uncertainties.

DMV 59

Alloy Digest ◽  
2009 ◽  
Vol 58 (8) ◽  
Keyword(s):  
Fracture Toughness ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Mechanical Strength ◽  
Physical Properties ◽  
Tensile Properties ◽  
Heat Treating ◽  
High Mechanical Strength ◽  
Temperature Performance

Abstract DMV 59 is the material of choice for a wide variety of applications where significant corrosion resistance and high mechanical strength is necessary. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as fracture toughness. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, and joining. Filing Code: Ni-672. Producer or source: Mannesmann DMV Stainless USA Inc.

Lime kiln conversion from coke to natural gas operation – an option in direction of sustainable energy

2020 ◽  
pp. 431-434
Author(s):  
Oliver Arndt
Keyword(s):  
Natural Gas ◽  
New Technology ◽  
Exhaust Gas ◽  
Gas Temperature ◽  
Gaseous Fuels ◽  
Lime Kiln ◽  
Lime Kilns ◽  
Co2 Balance ◽  
Exhaust Gas Temperature

This paper deals with the conversion of coke fired lime kilns to gas and the conclusions drawn from the completed projects. The paper presents (1) the decision process associated with the adoption of the new technology, (2) the necessary steps of the conversion, (3) the experiences and issues which occurred during the first campaign, (4) the impacts on the beet sugar factory (i.e. on the CO2 balance and exhaust gas temperature), (5) the long term impressions and capabilities of several campaigns of operation, (6) the details of available technologies and (7) additional benefits that would justify a conversion from coke to natural gas operation on existing lime kilns. (8) Forecast view to develop systems usable for alternative gaseous fuels (e.g. biogas).

scholarly journals Exhaust Gas Temperature Measurements in Diagnostics of Turbocharged Marine Internal Combustion Engines Part I Standard Measurements

2015 ◽  
Vol 22 (1) ◽  
pp. 47-54 ◽  
Author(s):  
Zbigniew Korczewski
Keyword(s):  
Internal Combustion Engines ◽  
Internal Combustion ◽  
Technical Condition ◽  
Temperature Measurements ◽  
Injection System ◽  
Exhaust Gas ◽  
Combustion Engines ◽  
Gas Temperature ◽  
Measuring Signal ◽  
Exhaust Gas Temperature

Abstract The article discusses the problem of diagnostic informativeness of exhaust gas temperature measurements in turbocharged marine internal combustion engines. Theoretical principles of the process of exhaust gas flow in turbocharger inlet channels are analysed in its dynamic and energetic aspects. Diagnostic parameters are defined which enable to formulate general evaluation of technical condition of the engine based on standard online measurements of the exhaust gas temperature. A proposal is made to extend the parametric methods of diagnosing workspaces in turbocharged marine engines by analysing time-histories of enthalpy changes of the exhaust gas flowing to the turbocompressor turbine. Such a time-history can be worked out based on dynamic measurements of the exhaust gas temperature, performed using a specially designed sheathed thermocouple. The first part of the article discusses possibilities to perform diagnostic inference about technical condition of a marine engine with pulse turbocharging system based on standard measurements of exhaust gas temperature in characteristic control cross-sections of its thermal and flow system. Selected metrological issues of online exhaust gas temperature measurements in those engines are discusses in detail, with special attention being focused on the observed disturbances and thermodynamic interpretation of the recorded measuring signal. Diagnostic informativeness of the exhaust gas temperature measurements performed in steady-state conditions of engine operation is analysed in the context of possible evaluations of technical condition of the engine workspaces, the injection system, and the fuel delivery process.

Sign in / Sign up

Export Citation Format

Share Document