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The operating processes in exhaust hood of steam turbine high pressure cylinder

DOI: 10.1615/ICHMT.2012.ProcSevIntSympTurbHeatTransfPal.700
pages 656-659

Svitlana Alyokhina
A. M. Pidgorny Institute for Mechanical Engineering Problems of the National Academy of Sciences of Ukraine, Kharkiv, UA-61046, Ukraine; V.N. Karazin Kharkiv National University, Kharkiv, UA-61022, Ukraine

Sinopsis

For effective construction and operation of steam turbines it is necessary to know detailed information about thermal and gas-dynamics processes in each element. In this paper an investigations of thermal and gas dynamics processes have been carried out for next thermal stress estimation in steam turbine exhaust hood. The direct coupled problem of heat exchange has been solved. Depending on gas-dynamic processes the thermal fields of solid and fluid mediums was obtained. Based on these results the heat transfer coefficients on surfaces by the decision of inverse problem of heat transfer are defined. The influence of flow structure on the values of heat transfer coefficients was shown. Data will be used for durability estimation of steam turbines.

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