Thrust Characterization of Cryosat Cold-gas Propulsion System

2004 ◽  
Author(s):  
Davide Nicolini ◽  
Enrico Chesta ◽  
Maureen Picard ◽  
Rita Correia ◽  
Ben Thornber ◽  
...  
Keyword(s):  
Propulsion System ◽  
Cold Gas

A Survey of Advanced Methods for Analysis and Modeling of Propulsion System Reliability

2007 ◽  
Author(s):  
Richard C. Millar ◽  
Thomas A. Mazzuchi ◽  
Shahram Sarkani
Keyword(s):  
Power Systems ◽  
Failure Modes ◽  
Health Management ◽  
Propulsion System ◽  
System Availability ◽  
Maintenance Costs ◽  
Hard Time ◽  
The Impact ◽  
And Storage

Electronic controls, propulsion system monitoring and health management and application of information technology to maintenance data capture and storage are enabling users to accumulate large amounts of reliability and related maintenance data. Effective analysis and exploitation of these data bases requires advanced tools to extract meaningful and actionable information. The challenges include “competing” failure modes and periodic hard time maintenance that “censors” information from impending failures, and a high number of failure modes that confound analysis. These factors impede accurate assessment of the impact of corrective action and different maintenance procedures on availability and maintenance costs. They confound understanding of the reliability of complex propulsion & power systems that would enable more representative modeling of system availability and maintenance costs for both existing and future applications. Tools providing more complete and accurate characterization of reliability information for complex systems are being developed for aerospace, nuclear and communications industries. These are surveyed and capability gaps identified with respect to commercial and military propulsion & power systems.

scholarly journals Cold gas spray coatings: basic principles corrosion protection and applications

2017 ◽  
Vol 42 (1) ◽  
pp. 09 ◽  
Author(s):  
Fernando Santos da Silva ◽  
Núria Cinca ◽  
Sergi Dosta ◽  
Irene Garcia Cano ◽  
Josep Maria Guilemany ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Great Part ◽  
Spray Parameters ◽  
Basic Principles ◽  
Spray Coatings ◽  
Powder Composition ◽  
Particle Size And Shape ◽  
Spray Gun ◽  
Cold Gas

In this review, the beginnings and evolution of the cold gas spray (CGS) technique are described, followed by the main fundamental aspects of the technique together with a description of the several spraying systems up to date. Sequentially, the main spray parameters and their influence on the properties of the coatings are reported. Afterwards, the most important methodologies for preparing the feedstock powders to be sprayed, the effect of the powder composition, microstructure, particle size and shape on the properties of the coatings are discussed. The nature of the spray gun and nozzle, and the substrate pre-treatments were also discussed. With regard to microstructure and properties, the chemical and physical characterization of the coatings and the performance in protecting the substrates against corrosion together with some mechanical properties are presented and compared. The lacking systematic studies about the great part of investigated systems is the main drawback to compare the published results. Closing this review, the main applications, and the potentialities of the CGS coatings are evidenced.

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