Examination of the evolutionary growth requirement of the U.S. SpaceStation Freedom propulsion system

1990 ◽  
Author(s):  
JOSEPH MORANO ◽  
JOHN HENDERSON
Keyword(s):  
Propulsion System ◽  
Growth Requirement ◽  
Evolutionary Growth ◽  
The U.S

Dust and Sand Protection for Marine Gas Turbines

1982 ◽  
Vol 104 (2) ◽  
pp. 260-267 ◽  
Author(s):  
M. R. Caskey
Keyword(s):  
Gas Turbine ◽  
Persian Gulf ◽  
Gas Turbines ◽  
Ship Design ◽  
Propulsion System ◽  
Electrical Generator ◽  
Gas Turbine Combustion ◽  
System Designs ◽  
Generator Gas ◽  
The U.S

The newest ship class to enter the U.S. Navy (USN) fleet is the DDG-993 KIDD Class guided missile destroyer. The lead ship of the Class, delivered March 1981, incorporates the main features of the DD 963 Class hull and main propulsion system designs. Originally ordered by the Imperial Iranian Navy (IIN), the ship design also incorporates unique features for protection from dust and sand. The ventilation ducting, deck machinery, and gas turbine combustion air all required modifications to protect against damage due to the expected Persian Gulf environment. This paper will outline the hardware changes considered necessary to meet the requirements for satisfactory IIN performance for the propulsion and electrical generator gas turbines.

scholarly journals GE LM2500 Marine Gas Turbine Experience Update

1991 ◽  
Author(s):  
Robert E. Reid ◽  
John J. Hartranft
Keyword(s):  
Gas Turbine ◽  
Propulsion System ◽  
Operational Experience ◽  
Ship Propulsion ◽  
The U.S

This paper provides a status of the ship propulsion system applications, the marine operational experience, and the demonstrated reliability of the GE LM2500 gas turbine. The unique maintenance approach that has been developed by the U.S. Navy and GE to maximize the availability of the LH2500 is also described.

Rendez vous with Saturn's rings

1984 ◽  
Vol 75 ◽  
pp. 743-759 ◽  
Author(s):  
Kerry T. Nock
Keyword(s):  
Solar Energy ◽  
Electric Propulsion ◽  
Power Source ◽  
Propulsion System ◽  
Low Thrust ◽  
Ring Plane ◽  
The Earth ◽  
Total Impulse ◽  
Saturn's Rings

ABSTRACTA mission to rendezvous with the rings of Saturn is studied with regard to science rationale and instrumentation and engineering feasibility and design. Future detailedin situexploration of the rings of Saturn will require spacecraft systems with enormous propulsive capability. NASA is currently studying the critical technologies for just such a system, called Nuclear Electric Propulsion (NEP). Electric propulsion is the only technology which can effectively provide the required total impulse for this demanding mission. Furthermore, the power source must be nuclear because the solar energy reaching Saturn is only 1% of that at the Earth. An important aspect of this mission is the ability of the low thrust propulsion system to continuously boost the spacecraft above the ring plane as it spirals in toward Saturn, thus enabling scientific measurements of ring particles from only a few kilometers.

Historical Introduction

1977 ◽  
Vol 35 ◽  
pp. 2-5
Author(s):  
R. D. Heidenreich
Keyword(s):  
Electron Emission ◽  
Secondary Electron ◽  
Secondary Electron Emission ◽  
50Th Anniversary ◽  
Secondary Emission ◽  
Wave Nature ◽  
Nobel Prize In Physics ◽  
Primary Electrons ◽  
The U.S ◽  
Mutual Agreement

This program has been organized by the EMSA to commensurate the 50th anniversary of the experimental verification of the wave nature of the electron. Davisson and Germer in the U.S. and Thomson and Reid in Britian accomplished this at about the same time. Their findings were published in Nature in 1927 by mutual agreement since their independent efforts had led to the same conclusion at about the same time. In 1937 Davisson and Thomson shared the Nobel Prize in physics for demonstrating the wave nature of the electron deduced in 1924 by Louis de Broglie.The Davisson experiments (1921-1927) were concerned with the angular distribution of secondary electron emission from nickel surfaces produced by 150 volt primary electrons. The motivation was the effect of secondary emission on the characteristics of vacuum tubes but significant deviations from the results expected for a corpuscular electron led to a diffraction interpretation suggested by Elasser in 1925.

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