scholarly journals Integrated Pressure-Fed Liquid Oxygen / Methane Propulsion Systems - Morpheus Experience, MARE, and Future Applications

2016 ◽  
Author(s):  
Eric A. Hurlbert ◽  
Matthew J. Atwell ◽  
John C. Melcher ◽  
Robert L. Morehead
Keyword(s):  
Liquid Oxygen ◽  
Propulsion Systems

Some Problems Arising from the Use of Hydrogen-Fuelled Propulsion Systems

1964 ◽  
Vol 68 (647) ◽  
pp. 765-772 ◽  
Author(s):  
L. E. Maher
Keyword(s):  
Rocket Engine ◽  
Liquid Hydrogen ◽  
Propulsion System ◽  
Liquid Oxygen ◽  
Propulsion Systems ◽  
Vehicle Performance ◽  
Third Stage ◽  
Upper Stage ◽  
Chemical Propulsion ◽  
Rocket Technology

SummaryIt is now generally recognised that liquid hydrogen offers a considerable increase in vehicle performance over the more conventional fuels, despite its relatively low density.A design study on an upper stage, which uses a liquid hydrogen/ liquid oxygen chemical propulsion system, revealed a number of problem areas which extend beyond the current levels of experience and knowledge in rocket technology existing in the U.K. This study was made on the third stage of a communication satellite launching vehicle, and a number of the problems high-lighted during the course of the investigation, covering both the propulsion system and the structure, are described and discussed in terms of their importance and their effects on the launcher system. Solutions are suggested where possible—although, lacking practical confirmation, these must be tentative in the circumstances.While no fundamental difficulties are anticipated in the development of a rocket engine using hydrogen, it is essential to accumulate some background of data and experience to ensure that early policy and designs are sound; the importance of beginning practical work as soon as possible is emphasised.

MOLECULAR DYNAMICS CALCULATIONS OF NEAR-CRITICAL LIQUID OXYGEN DROPLET SURFACE TENSION

2005 ◽  
Vol 15 (4) ◽  
pp. 413-422 ◽  
Author(s):  
Michael M. Micci ◽  
S. J. Lee ◽  
B. Vieille ◽  
C. Chauveau ◽  
Iskendar Gokalp
Keyword(s):  
Molecular Dynamics ◽  
Surface Tension ◽  
Droplet Surface ◽  
Liquid Oxygen ◽  
Molecular Dynamics Calculations

Naval Hybrid Power Take-Off and Power Take-In – Lessons Learnt and Future Advances

2018 ◽  
Author(s):  
M Benatmane ◽  
B Salter
Keyword(s):  
Electrical Power ◽  
Maritime Industry ◽  
Propulsion Systems ◽  
Systems Architecture ◽  
Hybrid Propulsion ◽  
Leading Role ◽  
Lessons Learnt ◽  
Marine Industry ◽  
Operational Systems ◽  
Great Pressure

With the ever tightening of budgets and legislation, new vessel builds are facing tough times.  The future maritime industry requires more efficient vessels to minimise ship operational costs with cleaner technologies that meet stringent environment regulations, reduce greenhouse gas emissions, specifically carbon emissions. Emissions reduction continues to be high on the agenda for the marine industry, it is responsible for about 2.5 percent of global greenhouse emissions1 and is under great pressure to reduce its environmental impact. With pressure comes the opportunity to incentivize innovation, developments and implementation of energy efficient measures, both design and operational. Naval propulsion systems are no different from other industries, and the industry is exploring ways to optimise propulsion and electrical power generation systems architecture for better performance and efficiency. Electric technology plays a leading role. The paper will: Provide a brief overview about the hybrid propulsion concept, with key electrical, mechanical qualities and issues. Describe different designs configurations and performances of hybrid propulsion systems from demonstrated and operational systems in the commercial and naval world. Cover the lessons learnt in technologies and controls used on such systems. Examine future architectures including energy storage and explore the benefits and the flexibility these can bringto the hybrid propulsion sphere.

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