Propulsion Machinery of the “Koeln” Class Escort Frigates With Special Consideration of Gas Turbine Propulsion

1965 ◽  
Author(s):  
K. H. Kurzak ◽  
H. Reuter
Keyword(s):  
High Pressure ◽  
Diesel Engine ◽  
Gas Turbine ◽  
High Speed ◽  
High Performance ◽  
Space Structure ◽  
Propulsion Systems ◽  
Design Work ◽  
High Speed Diesel ◽  
Advanced Development

The Koeln Class escort frigates represents the first larger type of vessel built for the German Federal Navy. The design work dates back as far as 1955–1956. In view of the planned operational use of the ships an extremely light construction of the propulsion machinery with a long operating range was required. Furthermore, combat safety required an appropriate space structure of the propulsion machinery. For this purpose various propulsion systems were examined at the time, e.g., steam-turbine and diesel-engine propulsion, and a comparison was made between direct and electrical output transmissions. The advanced development of gas-turbine technique in connection with the introduction of high pressure-charged, high-speed diesel engines together with the development of high-performance, variable-pitch propellers led to a design which, compared with other types of propulsion, proved to be extremely advantageous not only with regard to the standard displacement of the vessel but, because of the low fuel consumption, also to the displacement of the fully equipped ship (1, 2).

Detecting and Correcting Cylinder Imbalance in Direct Injection Engines

2000 ◽  
Vol 123 (3) ◽  
pp. 413-424 ◽  
Author(s):  
M. J. van Nieuwstadt ◽  
I. V. Kolmanovsky
Keyword(s):  
High Pressure ◽  
Diesel Engine ◽  
High Speed ◽  
Fuel Injection ◽  
Direct Injection ◽  
Direct Injection Engines ◽  
High Speed Diesel ◽  
On Line ◽  
Manufacturing Accuracy ◽  
Adaptation Scheme

Modern direct injection engines feature high pressure fuel injection systems that are required to control the fuel quantity very accurately. Due to limited manufacturing accuracy these systems can benefit from an on-line adaptation scheme that compensates for injector variability. Since cylinder imbalance affects many measurable signals, different sensors and algorithms can be used to equalize torque production by the cylinders. This paper compares several adaptation schemes that use different sensors. The algorithms are evaluated on a cylinder-by-cylinder simulation model of a direct injection high speed diesel engine. A proof of stability and experimental results are reported as well.

A SIMULATION APPROACH FOR PLANING BOATS PROPULSION AND MANOEUVRABILITY

2016 ◽  
Vol 158 (B1) ◽  
Author(s):  
A Ircani ◽  
M Martelli ◽  
M Viviani ◽  
M Altosole ◽  
C Podenzana-Bonvino ◽  
...  
Keyword(s):  
High Speed ◽  
High Performance ◽  
Preliminary Design ◽  
Propulsion Systems ◽  
Sea Trial ◽  
Performance Requirements ◽  
High Speed Diesel ◽  
Captive Model Tests ◽  
Speed Up

A comprehensive approach to modelling and simulation of high speed craft dynamics during turning circle and zig-zag manoeuvres is presented in this paper. The high performance requirements for propulsion systems and the increasing attention being paid to planing hull manoeuvring features suggest the need for a thorough investigation into ship dynamics, starting in the preliminary design phase. Dynamic aspects of planing craft during manoeuvres cannot be adequately dealt with by traditional methodologies and purely steady state approaches. For this reason, the boat’s dynamic behaviour is evaluated by means of a time domain simulator, able to represent the hull dynamics, including the mutual interactions with the propulsion system and propulsion controller. Manoeuvrability characteristics are simulated on the basis of captive model tests on planing hulls available in open literature. Compared with previous similar studies, in the present work a possible strategy is introduced to represent roll motion due to the propulsion and steering effects. Finally, the simulation results are compared with sea trial records in order to highlight the capabilities and shortcomings of the proposed method. The case study analysed is a boat equipped with two azimuthal propulsors driven by two high-speed diesel engines that ensure a speed up to 32.5 kn.

scholarly journals Gas Turbine Development in Sweden After 1945: A Historical Review

1998 ◽  
Author(s):  
Kjell T. E. Thoren
Keyword(s):  
Gas Turbine ◽  
Air Force ◽  
Gas Turbines ◽  
High Speed ◽  
High Performance ◽  
Historical Review ◽  
Propulsion Systems ◽  
Hybrid Propulsion ◽  
History Of ◽  
Industrial Gas Turbine

The gas turbine development history of Sweden is exciting. By international comparison Sweden and its gas turbine manufacturers are small but can nevertheless claim periods with the worlds highest output, or highest efficiency large industrial gas turbine respectively. Sweden has always created its own military aircraft and fitting, high performance engines are developed in Sweden in license cooperation with large international manufacturers. The Swedish Air Force ranked number four in the world during the 60s. Pioneering contributions were also made with small gas turbines, such as high speed turbogenerators in hybrid propulsion systems for cars and trucks. Professionals know that gas turbine development success does not come easy. A lot of setbacks have to be mastered. The size of the crew is not always significant in the process.

scholarly journals Prognostic Assessment of the Performance Parameters for the Industrial Diesel Engines Operated with Microalgae Oil

2021 ◽  
Vol 13 (11) ◽  
pp. 6482
Author(s):  
Sergejus Lebedevas ◽  
Laurencas Raslavičius
Keyword(s):  
Energy Efficiency ◽  
Diesel Engine ◽  
High Speed ◽  
Performance Parameters ◽  
Prognostic Assessment ◽  
High Speed Diesel ◽  
Microalgae Oil ◽  
The Difference ◽  
Smoke Opacity ◽  
Efficiency Indicators

A study conducted on the high-speed diesel engine (bore/stroke: 79.5/95.5 mm; 66 kW) running with microalgae oil (MAO100) and diesel fuel (D100) showed that, based on Wibe parameters (m and φz), the difference in numerical values of combustion characteristics was ~10% and, in turn, resulted in close energy efficiency indicators (ηi) for both fuels and the possibility to enhance the NOx-smoke opacity trade-off. A comparative analysis by mathematical modeling of energy and traction characteristics for the universal multi-purpose diesel engine CAT 3512B HB-SC (1200 kW, 1800 min−1) confirmed the earlier assumption: at the regimes of external speed characteristics, the difference in Pme and ηi for MAO100 and D100 did not exceeded 0.7–2.0% and 2–4%, respectively. With the refinement and development of the interim concept, the model led to the prognostic evaluation of the suitability of MAO100 as fuel for the FPT Industrial Cursor 13 engine (353 kW, 6-cylinders, common-rail) family. For the selected value of the indicated efficiency ηi = 0.48–0.49, two different combinations of φz and m parameters (φz = 60–70 degCA, m = 0.5 and φz = 60 degCA, m = 1) may be practically realized to achieve the desirable level of maximum combustion pressure Pmax = 130–150 bar (at α~2.0). When switching from diesel to MAO100, it is expected that the ηi will drop by 2–3%, however, an existing reserve in Pmax that comprises 5–7% will open up room for further optimization of energy efficiency and emission indicators.

Characteristics of injection of diesel fuel, rapeseed oil and their mixtures in diesel engines of various types

2021 ◽  
pp. 167-178
Author(s):  
Keyword(s):  
Diesel Engine ◽  
Diesel Fuel ◽  
Diesel Engines ◽  
Rapeseed Oil ◽  
High Speed ◽  
Fuel Injection ◽  
Experimental Studies ◽  
Fuel Injector ◽  
High Speed Diesel ◽  
Engine Type

The necessity of adapting diesel engines to work on vegetable oils is justified. The possibility of using rapeseed oil and its mixtures with petroleum diesel fuel as motor fuels is considered. Experimental studies of fuel injection of small high-speed diesel engine type MD-6 (1 Ch 8,0/7,5)when using diesel oil and rapeseed oil and computational studies of auto-tractor diesel engine type D-245.12 (1 ChN 11/12,5), working on blends of petroleum diesel fuel and rapeseed oil. When switching autotractor diesel engine from diesel fuel to rapeseed oil in the full-fuel mode, the mass cycle fuel supply increased by 12 %, and in the small-size high-speed diesel engine – by about 27 %. From the point of view of the flow of the working process of these diesel engines, changes in other parameters of the fuel injection process are less significant. Keywords diesel engine; petroleum diesel fuel; vegetable oil; rapeseed oil; high pressure fuel pump; fuel injector; sprayer

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.

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