scholarly journals Gas Turbine Train Development in France

1975 ◽  
Author(s):  
M. R. Garde
Keyword(s):  
Diesel Engine ◽  
Gas Turbine ◽  
High Speed ◽  
Rolling Stock ◽  
Lightweight Construction ◽  
The Future ◽  
Railway Traction ◽  
Aircraft Type ◽  
Very High

This paper presents a discussion on aircraft type gas-turbine train development. For railway traction purposes, the turbo-engines used on aircraft would improve the quality of the services provided in the electrified lines. The gas turbine should insure high speed and satisfactory acceleration. It would enable relatively lightweight construction to be carried out and run at a higher speed than trains on non-electrified lines. The gas turbine will not completely replace the diesel engine, but it will enable rolling stock to be constructed for which the diesel is unsuitable, especially in the case of high-speed, lightweight trainsets and, in the future, very high-powered units.

scholarly journals How to Get Component Maps for Aircraft Gas Turbine Performance Calculations

1996 ◽  
Author(s):  
Joachim Kurzke
Keyword(s):  
Gas Turbine ◽  
High Speed ◽  
Measured Data ◽  
Turbine Performance ◽  
The Many ◽  
Map Data ◽  
Performance Calculation ◽  
Excellent Tool ◽  
Very High ◽  
Drawing Program

Precise simulations of gas turbine performance cannot be done without component maps. In the early days of a new project one often has to use scaled maps of similar machines. Alternatively one can calculate the component partload characteristics provided that the many details needed for such an exercise are available. In a later stage often rig tests will be done to get detailed information about the behavior of the compressors respectively turbines. Performance calculation programs usually require the map data in a specific format. To produce this format needs some preprocessing. Measured data cannot be used directly because they show a scatter and they are not evenly distributed over the range of interest. Due to limitations in the test equipment often there is lack of data for very low and very high speed. With the help of a specialized drawing program available on a PC one can easily eliminate the scatter in the data and also inter- and extrapolate additional lines of constant corrected speed. Many graphs showing both the measured data and the lines passing through the data as a function of physically meaningful parameters allow to check whether the result makes sense or not. The extrapolation of compressor maps toward very low speed, as required for the calculation of starting, idle and windmilling performance calculations, is discussed in some detail. Instead of true measured data one can use data read from maps published in open literature. The program is also an excellent tool for checking and extending component maps one has derived from sparse information about a gas turbine to be simulated.

scholarly journals Surgical training in the UK

2007 ◽  
Vol 89 (1) ◽  
pp. 12-14
Author(s):  
L Williams
Keyword(s):  
Surgical Training ◽  
High Standard ◽  
Training System ◽  
The Future ◽  
The Uk ◽  
Very High ◽  
The Eu

The surgical training system in the UK has long been considered to be of a very high standard. However, it is currently under threat from many changes. To assure the quality of the future surgical consultant workforce we have moved away from apprentice-type training towards more ordered education. Although the reduction in hours and years will mean less overall experience there is a genuine belief that improved education and assessment can compensate. It says much for our island mentality that although we belong to the EU we consider European surgical training to be distinct from our own.

scholarly journals Technical parameters of high speed lines as the determinant for selection of rolling stock

2018 ◽  
Vol 180 ◽  
pp. 06007
Author(s):  
Jan Raczyński
Keyword(s):  
High Speed ◽  
Point Of View ◽  
Rolling Stock ◽  
High Speed Rail ◽  
Technical Parameters ◽  
Rail Vehicle ◽  
Railway Infrastructure ◽  
The One ◽  
Selection Of

Choosing a high-speed rail vehicle depends on many factors. On the one hand, there are requirements for ensuring the quality of service for passengers, on the other hand, there are constraints resulting from the parameters of available infrastructure. Also a relation of the benefit and financial costs associated with the purchase and the operation of rolling stock is essential. Technical characteristics of vehicles selected for operating a particular system is a compromise between the three groups of requirements. In this article technical parameters of railway infrastructure and rolling stock are classified and then analysed from the TSI requirements point of view.

scholarly journals Gas Turbine Drive for New High Speed Trains

1975 ◽  
Author(s):  
Rolf Keller
Keyword(s):  
Diesel Engine ◽  
Gas Turbine ◽  
Gas Turbines ◽  
High Speed ◽  
Electrical Transmission ◽  
Rail Vehicles ◽  
Successful Series ◽  
Exhaust Gas Emission ◽  
High Speed Trains ◽  
The Usa

After numerous tests over the last 40 years, the aircraft gas turbine of two-shaft design has emerged as the most promising power unit for high-powered, fast and lightweight rail vehicles of the future. The performance characteristics, superior to those of the diesel engine, are complemented either by an electrical transmission system or a hydraulic transmission unit. The advantage of the gas turbine lies in its compactness and lightness in weight, allowing a doubling of power and savings in space. Viewed from a commercial standpoint, this means a covering of fuel costs. In respect of noise development and exhaust gas emission, the gas turbine is also more favorable than the diesel engine. The most successful series-built vehicles powered by gas turbines are the turbotrains of the SNCF which have also been imported into the USA where they are to be built under license.

scholarly journals RECONSTRUCTION OF INFRASTRUCTURE LLC "AVTOMIR"

2017 ◽  
Vol 21 (6) ◽  
pp. 32-43 ◽  
Author(s):  
E. V. Ageev ◽  
Yu. G. Alekhin ◽  
S. A. Grаshcow ◽  
N. V. Sarigo
Keyword(s):  
Power System ◽  
Production Capacity ◽  
Operating Conditions ◽  
The Body ◽  
Rolling Stock ◽  
Economic Activities ◽  
Maintenance And Repair ◽  
The Future ◽  
Technical Maintenance

The need for the reconstruction of existing auto service enterprises is caused by changes in the structure of the rolling stock, the design of cars and the conditions of their operation, increasing the requirements for the quality of rolling stock, the design of cars and their operating conditions, increasing the quality requirements for maintenance and repair, saving fuel and energy resources and quality assurance of the environment. In our case, the need to reconstruct the autoservice company LLC "Avtomir" is associated with the need to switch to maintenance and storage of new types of rolling stock, as well as changes in the dynamics of demand for cars. In LLC Avtomir there is no possibility of rendering services related to damage to the body of the car, which reduces the ability of the organization to receive additional income, as this type of damage owners of vehicles have to eliminate at other service stations. This fact puts the company in front of the need to create a paint and body shop in the future. The purpose of this work was the development of measures to reconstruct the infrasructure of LLC "Avtomir". The main results of the technological calculation of the enterprise are as follows: - the annual workload of the technical service station is 43529 man-hour; - annual scope of works of washing, maintenance, lubrication, adjusting for setting the angles of the front wheels, adjusting brakes, maintenance and repair of the power system, electrical, tire fitting 4913; 15235.2; 2176.5; 2611.7; 3917.6; 4353; 4353; 2285 and 914 man-hour respectively; - the annual volume of works at the tire fitting site, on the maintenance and repair site of the power supply system, electrical, maintenance units is 2133; 762; 4788.2 man-hour respectively; - necessary number of production workers for maintenance and technical maintenance 29 (technological) and 35 (staff), as well as the number of auxiliary 4 and engineering - technical 5 workers; - the necessary number of posts for washing, maintenance, lubricants, technical maintenance, adjusting for setting the angles of the front wheels, adjusting for the brakes, maintenance and repair of the power system, electrical 4; 1; 1; 1; 1; 1 and 1 respectively. Analysis of production and economic activities of the enterprise allowed us to identify the objectives of the enterprise, the dynamics of its development, the state of the production and technical base. This makes it possible to identify the main shortcomings in the functioning of the organization and to implement the formulation of new tasks that need to be solved in the future. Namely, LLC "Avtomir" needs to increase production capacity, namely the addition of a diagnostic post and one more car acceptance post. In addition, there is a need to implement the washing zone, and on the vacated area to arrange a painting and drying chamber and a preparation site for painting works.

Development of Foil Bearings for Small Rotors

2013 ◽  
Author(s):  
Sadanand Kulkarni ◽  
Soniya D. Naik ◽  
K. Sarosh Kumar ◽  
M. Radhakrishna ◽  
Soumendu Jana
Keyword(s):  
Gas Turbine ◽  
High Speed ◽  
Load Capacity ◽  
Capacity Design ◽  
Micro Gas Turbine ◽  
Foil Bearings ◽  
High Speeds ◽  
Lubricating Property ◽  
Very High

Lubricant free high speed turbo-machineries are one of the emerging fields in the gas turbine technology. Foil bearings are the major contenders in the lubricant free bearings due to their ability to support significant loads at very high speeds. The paper deals with the various stages in the development of discrete and continuous bump foil bearings and testing of the same for designed speeds and loads. Development of bumps involves determination of bump geometry for the desired load capacity, design of special purpose dies for the fabrication of corrugated sheets, identification of suitable bump material and evolution of heat treatment process. Here Beryllium–Copper (Be-Cu) is used as a bump material because of its self-lubricating property and good mechanical strength. The clearance between the shaft and top foil can be adjusted by providing the back-up foils between the encircling foil and bump foil. The rotor system simulating the weight of a typical micro gas turbine is designed and fabricated. The foil bearings developed are tested under this simulated load conditions at speeds above 50,000 rpm. The results obtained show that the rotor is completely airborne at speed slightly above 9000 rpm and at higher speeds the rotor is stable.

scholarly journals Gas Turbine Applications for Railcar in Japan

1974 ◽  
Author(s):  
S. Takita
Keyword(s):  
Gas Turbine ◽  
Industrial Application ◽  
High Speed ◽  
Rolling Stock ◽  
Prime Mover ◽  
History Of Development ◽  
History Of

In 1967, IHI engaged in developing a gas turbine for high speed railcars as an industrial application of the aero gas turbine CT58. Since then, IM100-1R and IM100-2R engines, derived from CT58’s, have been tested on the bench and on experimental railcars by the Japanese Rolling Stock Manufacturers association (JRSMA) and the Japan National Railway (JNR). In this paper, a brief history of development tests for gas turbine railcars, problems and improvements in applications of the IM100-1R and -2R for prime mover of the railcar are described.

The Optimization of the Beam of High-Speed Computerized Embroidery Machine

2013 ◽  
Vol 470 ◽  
pp. 381-384
Author(s):  
Jun Rong Zhou
Keyword(s):  
Performance Analysis ◽  
High Speed ◽  
Dynamic Performance ◽  
New Model ◽  
Breakage Rate ◽  
The Future ◽  
Dynamic Performance Analysis ◽  
A Company

The beam of embroidery machine vibrates more intensely and breakage rate goes higher when the spindle rotates at 850rpm and then the quality of product reduces drastically. One high-speed computerized embroidery machine with 20 heads manufactured by a company in Jiangmen was studied for the problem mentioned above. Dynamic performance analysis was conducted to the beam by analytical experiment and computation based on FEM through ANSYS. One improvement solution was proposed and theoretical verification to the optimized beam was processed. It provides a reference for the improvement on embroiderys structure and the development of new model in the future.

The Effect of Single Pulse, Double Pulse and ForceArc MIG Welding Technology on Mechanical Properties of Welding Joint for 5083 Aluminum Alloy Used in High-Speed Train Body

2011 ◽  
Vol 337 ◽  
pp. 460-465
Author(s):  
Lei Su ◽  
Yuan Nie ◽  
Hua Ji ◽  
Chuan Ping Ma ◽  
Shao Hua Yan ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
High Speed ◽  
Single Pulse ◽  
Double Pulse ◽  
High Speed Train ◽  
Welding Joint ◽  
5083 Aluminum Alloy ◽  
Very High

The technology of lightening manufacture for aluminum alloy train body is one key of manufacturing high-speed train . The train body is a whole bearing loading tubular structure which is welded together by the large, hollow, thin-walled aluminum extrusion. Therefore，the demand for welding quality of aluminum alloy train body is very high，and the mechanical properties of joints severely affected the overall strength of welded components. To solve this problem ,we use the 421 EXPERT forceArc MIG of PHOENIX series of German EWM company to perform three types of experiments of single pulse, double pulse, and forceArc welding ,and then effect of three welding methods on mechanical properties of Welding joint for 5083 aluminum alloy used in high-speed train body is compared.

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