Automatic Painting and Paint Removal System: A Preliminary Design for Aircraft Applications

2018 ◽  
pp. 640-650
Author(s):  
Umberto Morelli ◽  
Matteo D. L. Dalla Vedova ◽  
Paolo Maggiore
Keyword(s):  
Preliminary Design ◽  
System A ◽  
Paint Removal ◽  
Removal System

CATI: A Computer Aided Tolerancing Interface

1992 ◽  
Author(s):  
Rikard Söderberg
Keyword(s):  
Normal Distribution ◽  
Tolerance Analysis ◽  
Distribution Model ◽  
Preliminary Design ◽  
Tolerance Limits ◽  
Cad System ◽  
System A ◽  
Computer Aided ◽  
2D Drawing ◽  
Normal Distribution Model

Abstract This work presents an interface for tolerance analysis in a CAD system. A method for picking up necessary information from a 2D drawing is developed and implemented as an interface in a commercial CAD system. The interface communicates with an external calculation program which determines unknown tolerance limits using the normal distribution model. Results from the calculation program is in the end used by the interface to present measures with tolerances on the drawing. The advantage of using CATI in preliminary design is discussed, and a strategy for treating interrelated tolerance chains is presented.

Coal-Fueled Gas Turbine Combustor Island Development

1988 ◽  
Author(s):  
P. B. Roberts ◽  
R. T. LeCren ◽  
L. H. Cowell ◽  
M. L. Noble ◽  
A. M. Hasan
Keyword(s):  
Gas Turbine ◽  
System Component ◽  
Assessment Data ◽  
Gas Turbine Combustor ◽  
Slag Removal ◽  
System A ◽  
Order Of Magnitude ◽  
Sorbent Injection ◽  
Engine Size ◽  
Removal System

Solar Turbines Incorporated, a subsidiary of Caterpillar Inc., is currently developing under DOE sponsorship a coal-fueled version of its industrial Centaur Model H gas turbine for cogeneration applications. A critical sub-system component is the coal-fueled combustor island consisting of a Two-Stage Slagging Combustor (TSSC) with an integrated Particulate Rejection Impact Separator (PRIS). Earlier development of the TSSC consisted of basic feasibility demonstrations and emissions evaluations and has been reported previously together with preliminary system design and assessment data. This paper reports on the continued bench-scale development of the combustor island with the objective of developing a data base suitable for use in scaling-up the design by an order of magnitude to a rating consistent with application to the 3.8 MW Centaur Model H gas turbine. Development activities have included analytical and flow visualization modeling; sorbent injection tests for control of sulfur oxides; and baseline evaluations of a continuous slag removal system. A preliminary engine-size combustor island design is also presented.

Support Structures Extraction for Hybrid Layered Manufacturing

2001 ◽  
Author(s):  
Jianzhong Ruan ◽  
Jun Zhang ◽  
F. W. Liou
Keyword(s):  
Deposition Process ◽  
Extraction Methods ◽  
Layered Manufacturing ◽  
Machining Process ◽  
Support Material ◽  
Support Structures ◽  
System A ◽  
Material Deposition ◽  
Building Process ◽  
Removal System

Abstract In a multi-axis metal hybrid layered manufacturing system, a combined laser material deposition and material removal system with more than 3-aixs mobility, sometimes support structures are necessary in the part building process, which prevent object from falling during deposition process. Since the support material is the same as build material, it is very difficult to remove the support material in the post processing stage. Thus, the support material must be machined off. Therefore, the geometry information of support structures is important for the machining process. In this paper, a method is presented to extract support structures automatically. Two types of support structures, trapped and non-trapped, are classified in this paper and their extraction methods are discussed respectively.

Ammonia Removal from a Landfill Leachate by Nitrification and Denitrification

1985 ◽  
Vol 20 (3) ◽  
pp. 126-137 ◽  
Author(s):  
S. Dedhar ◽  
D.S. Mavinic
Keyword(s):  
Toxic Effect ◽  
Landfill Leachate ◽  
Ammonia Removal ◽  
Cod Removal ◽  
Glucose Loading ◽  
System A ◽  
Bacterial Uptake ◽  
Nitrification And Denitrification ◽  
Biological Treatability ◽  
Removal System

Abstract The purpose of this research project was to study the biological treatability of a leachate from an “older” landfill, with specific regard to the removal of ammonia by nitrification and denitrification. A single sludge denitrification system with recycle was used. Leachate ammonia concentrations of up to 288 mg/L-N were reduced to less than 1 mg/L. The ammonia was removed by nitrification and bacterial uptake. Glucose was added to aid denitrification. The degree of denitrification was dependent on the glucose loading to the anoxic reactor. The influent leachate COD removal was 20%; however after the addition of glucose to the system, a mean COD removal of 74% was obtained. The four metals monitored, zinc, manganese, nickel and iron were removed by the biomass, but not to the same extent. At the metal concentrations observed, there was no inhibitory/toxic effect to the ammonia removal system employed.

A study of a target identification method for an active debris removal system

2016 ◽  
Vol 231 (1) ◽  
pp. 180-189 ◽  
Author(s):  
Jae-Dong Seong ◽  
Hae-Dong Kim ◽  
Ha-Yeon Choi
Keyword(s):  
Space Debris ◽  
Line Element ◽  
Target Identification ◽  
Collision Probability ◽  
Object Type ◽  
System A ◽  
Active Debris Removal ◽  
Debris Removal ◽  
Primary Mission ◽  
Removal System

In a preparatory study conducted prior to the development of an active space debris removal system, a method for selecting target debris based on information such as the cumulative collision probability, the operational condition of objects, and their sizes and launch dates was developed for use in the protection of four Korea Multi-Purpose Satellite constellation satellites. This method can be used to select candidate removal targets. Two-line element data are used to identify threatening objects with high cumulative collision probability. Using information in the Satellite Catalog database, objects smaller than a certain size or objects that are currently operational were excluded from the selection range. The results of an analysis of the cumulative collision probability, object size, object type, and primary mission information showed that the COSMOS 1328, COSMOS 1862, COSMOS 375, and COSMOS 1606 satellites were suitable targets for an active debris removal mission.

scholarly journals Research and Application on the Key Parameters of the Long Compression and Short Pumping Ventilation Dust Removal System

2018 ◽  
Vol 237 ◽  
pp. 01015
Author(s):  
Zhang She-ji ◽  
MA Wei ◽  
MO Jin-ming
Keyword(s):  
Process Parameters ◽  
Dust Removal ◽  
Confined Space ◽  
Technological Parameters ◽  
Field Verification ◽  
System A ◽  
Air Jet ◽  
Air Volume ◽  
Working Face ◽  
Removal System

For the question of circulation wind emerged in the process of using long compression and short pumping ventilation dust removal system, a new model of air volume matching was proposed, and the empirical formula of the key process parameters such as axial and radial air volume, axial and radial air out distance were derived according to the relevant theories of air jet in the confined space. Then the 20106 return roadway of fully mechanized working face in Wang Jia Ling coal mine was selected to conduct field verification tests. The result showed that the new air volume catching model had good adaptability, and the key process parameters obtained by theoretical calculation and field test were basically identical. Under the condition of optimum technological parameters, the total dust and respiratory dust concentration of the driver’s place can be reduced 91.98% and 89.53% respectively.

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