JSC All Russia Heat Engineering Institute VTI

Moscow, Russia

JSC All Russia Heat Engineering Institute VTI

Moscow, Russia

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Belyakov A.V.,JSC All Russia Heat Engineering Institute VTI | Sarantsev V.V.,Belarusian National Technical University | Gorbachev A.N.,JSC All Russia Heat Engineering Institute VTI | Panteleenko F.I.,Belarusian National Technical University | And 2 more authors.
Power Technology and Engineering | Year: 2016

Work is devoted to studying development of technology for forming erosion-resistant coatings for steam turbine rotor blades by electric-spark alloying. Comparative analysis is provided for current methods of steam turbine rotor blade strengthening and repair. It is shown that electric-spark coating formation on leading edges is important, and development of forming technology is connected with a search for new materials. New engineering solutions are found for coating formation from cobalt stellites, the properties of cobalt stellite and cermet hard alloy VK8 electric-spark coatings are studied, and the effect of operating unit parameters on coating formation is demonstrated. New vibrator structures are created for forming electric-spark coatings making it possible to expand the range of electrode vibration to 260 Hz, and specimens are prepared for testing with coating formation. © 2016, Springer Science+Business Media New York.


Suchkov S.I.,JSC All Russia Heat Engineering Institute VTI | Ivanova I.P.,JSC All Russia Heat Engineering Institute VTI
Power Technology and Engineering | Year: 2016

Results are considered for a study of basic power steel corrosion rate in a producer gas atmosphere and a method is proposed for its calculation under industrial conditions. © 2016, Springer Science+Business Media New York.


Vasil'ev V.D.,JSC All Russia Heat Engineering Institute VTI | Bulysova L.A.,JSC All Russia Heat Engineering Institute VTI | Berne A.L.,JSC All Russia Heat Engineering Institute VTI
Power Technology and Engineering | Year: 2016

A computational and experimental investigation of the processes occurring in premix combustors with swirl stabilization similar to that used in modern gas-turbine engines is described. The combustor burner consists of main and pilot burners. The combustor operates on a mixture of natural gas and air with excess air coefficient from 10 to 2.6. The influence of the fuel fraction in the pilot burner (PFR) with fixed excess air coefficient á on the macrostructure of the flame — the relation between the shape and position of the flame front and the dominating structures of the flow — is examined. The flame front is investigated by means of three-dimensional numerical modeling. Four ma xxx crostructures are observed in the experimental PFR range from 0 to 100% with fixed excess air coefficient á. It is shown that each form of high-frequency combustion instability corresponds to a definite macrostructure of the flame. It is noted that the fuel fractions in the pilot burner at which changes are observed in the flame configuration are associated with the appearance of thermo-acoustic instability. © 2016, Springer Science+Business Media New York.

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