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Prikaz rezultata 11-20 od 52
High reflectance as desired property of shining surface and undesired for laser welding in jewel production of 585 gold alloy
(Metalurgia International, 2013)
For most of golden jewels the desired property is the shining surface. From the other point of view, high level of shining leads to great reflectance of impinged beams from a surface. It means that when a laser beam is ...
Numeričko određivanje radijacionih svojstava plamena ugljenog praha / Numerical determination of the pulverized coal flame radiative properties
(Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd i Društvo termičara Srbije, Beograd, 2013)
Ispitan je uticaj broja čestica letećeg pepela koje nastaju fragmentacijom jedne čestice koksnog ostatka na radijaciona svojstva disperzne faze plamena ugljenog praha, kao i da li se primenom tako dobijenih radijacionih ...
Numeričko i analitičko određivanje performansi vetroturbina sa vertikalnom osom obrtanja / Numerical and analytical investigation of vertical axis wind turbine
(Univerzitet u Beogradu - Mašinski fakultet, Beograd, 2013)
Većina istraživanja vezanih za vetroturbine su fokusirana na precizno određivanje njihove efikasnosti. U radu je istaknut napredak koji je ostvaren u razvoju aerodinamičkih modela za analizu vetroturbina sa vertikalnom ...
Metodološki pristup proceni integriteta i veka rotacione opreme u hidroelektrani - turbinsko vratilo / Methodological approach to integrity assessment and service life of rotating equipment at hydropower plant: Turbine shaft
(Institut za ispitivanje materijala, Beograd, 2013)
Horizontalne Kaplanove turbine su instalirane u hidroelektrani 'ĐERDAP 2', 10 jedinica ukupne snage 28 MW. Uzimajući u obzir činjenicu da se zamor pojavio u mnogim komponentama, sprovedeno je istraživanje uticaja režima ...
Improving structure dynamic behaviour using a reanalysis procedures technique
(Univ Osijek, Tech Fac, Slavonski Brod, 2013)
The present paper deals with the problem of improving dynamic characteristics for a sub-structure of bucket wheel excavator. The procedure is concerned with the analysis of the distribution of potential and kinetic energy ...
Wind energy resource development in Ethiopia as an alternative energy future beyond the. dominant hydropower
(Pergamon-Elsevier Science Ltd, Oxford, 2013)
Over the centuries, energy has been supplied by wood, coal, oil and natural gas, as well as by uranium. All these energy sources are limited and create pollution problems. This has led countries to focus on a sustainable ...
Analysis of fouling factor in district heating heat exchangers with parallel helical tube coils
(Pergamon-Elsevier Science Ltd, Oxford, 2013)
This paper presents the results of measurements of thermal performance of 8 heat exchangers with parallel helical coils. Measurements were conducted in substations in 2 district heating systems in Serbia: Belgrade and ...
Numerička optimizacija procesa u ložištu sa aspekata emisije NOx i efikasnosti energetskog kotla / Numerical optimisation of processes in the furnace considering NOx emission and efficiency of utility boiler
(Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd i Društvo termičara Srbije, Beograd, 2013)
Razvijen je matematički model, namenjen za predviđanje procesa u energetskim parnim kotlovima TE Kostolac B tangencijalno loženim sprašenim lignitom. Model je primenjen za numeričku analizu rada kotla radi smanjenja emisije ...
Distortion of the substructure of a 20-ft shipping container exposed to zinc hot-dip galvanizing
(Institute of Metals and Technology, 2013)
The main goal of this study was to build a model for a numerical simulation of hot-dip galvanizing of a 20-ft ISO shipping container. For that purpose, the basic transient thermo-mechanical problem of a steel structure ...
Effect of austempering temperature on cavitation behaviour of unalloyed ADI material
(Elsevier Science Inc, New York, 2013)
This paper provides an in-depth study and description of cavitation damage and microstructural changes in two types of unalloyed austempered ductile iron (ADI). ADI materials used were austempered at 300 and 400 degrees C ...