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Saint Petersburg, Russia

Krivonosova V.,OJSC Power Machines | Lebedev A.,OJSC Power Machines | Simin N.,OJSC Power Machines | Zolotogorov M.,JSC NPO CKTI | Kortikov N.,Saint Petersburg State Polytechnic University
Proceedings of the ASME Turbo Expo | Year: 2011

This paper presents the results of experimental and numerical investigations of cooling effectiveness of the film cooled turbine nozzle. The nozzle is with two internal cavities. Front cavity of the nozzle is fed with high pressure cooling air from compressor diffuser with minimal losses of pressure for ensuring film cooling of the leading edge. Rear cavity is with impingement tube for high effective convective cooling. Experimental measurements of cooling flow capacity and cooling effectiveness were carried out on experimental facility of OSC "NPO CKTI". Investigations included isothermal internal flow tests and hot tests with internal flow and metal temperature measurements. Test results were compared with flow and thermal field CFD predictions. Temperature fields of body and platforms of nozzle were predicted by conjugate heat transfer simulation. Computation domain includes vane-to-vane path flow, vane solid body with shrouds and holes for cooling air injection. Heat transfer conditions inside vane were calculated with one dimension internal flow model. Isothermal internal flow test results were used to validate one dimension internal flow model. Comparison of the experimental and simulation results enabled to modify calculation models to obtain good agreement. Turbine vane temperature fields calculations in different operation conditions were carried out with validated numerical models. Copyright © 2011 by ASME.

Gimmelberg A.S.,JSC NPO CKTI | Mikhailov V.E.,JSC NPO CKTI | Mikhailov V.G.,JSC NPO CKTI | Baeva A.N.,JSC NPO CKTI | And 5 more authors.
Power Technology and Engineering | Year: 2014

An atmospheric pressure deaerator with a capacity of 500 tons/h has been designed for use in the heat supply system at the JSC "South-West Power Plant". It employs superheated (relative to the saturation temperature for the pressure in the deaerator) water with a temperature of 130 - 150°C as a heat transfer medium. Tests and operational data of the new DA-500/100 deaerator show that it operates stably, reliably, and efficiently within the design range of hydraulic and thermal loads, while the quality of the feed water after it meets the standards. The DA-500/100 deaerator with superheated water as the heat transfer medium is recommended for use in large heat supply systems in heating and electric power plants and boiler plants. © 2014 Springer Science + Business Media New York.

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