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The new devices of gas-turbine engines of ground transport on the basis cascade pressure exchanger of krajniuk

Krajniuk A.

Transport Problems

2011

T. 6, z. 2

107-119

Main trends of perfection of gas-turbine engines (GTE) of transport plants by application of principles of the cascade pressure exchange (CPE) for air compression in the working cycle of gas-turbine plant have been analyzed. The principle of action and performances of work of heat compressor CPE realizing compression of working body on the whole at the expense straight convert inputting heat in disposing work of torrent with insignificant distraction mechanics work from shaft selection of power has been described. The results of computational investigation of four variants of the GTE working process organization on the basis of the two-staged compression assembly with intermediate cooling and heating of air-gas medium have been adduced. Application of units CPE in the capacity of compressing stage GTE opens the prospect of adaptations GTE performance by conditions of work in the capacity of forcing units of overland transport.

Skurcz liniowy i naprężenia skurczowe w okresie krzepnięcia i stygnięcia stopu AlSi21

Mutwil J.

Archiwum Odlewnictwa

2006

R. 6, nr 21/1

93-100

Opisano stanowisko do badania skurczu liniowego i naprężeń skurczowych w odlewie. Przedstawiono badania przebiegu zmian wymiaru liniowego i naprężeń skurczowych w krzepnącym i stygnącym odlewie pręta ze stopu AlSi21. Badania prowadzono w piaskowych i metalowych formach testowych.

An experimental set-up for examination of the progress of linear contraction- and shrinkage stresses in casting has been described. The examinations of linear contraction and shrinkage stresses progress in period of solidification and self-cooling of the rodcasting from hyper-eutectic AlSi21 alloy have been presented. The examinations have been in sand- and metal mould conducted.