Calculation and experimental research of influence of vapor ionization on the parameters of wet steam flow in supersonic nozzle

Authors

  • А. А. Тарелин A.N. Podgorny Institute for Mechanical Engineering Problems of NAS of Ukraine, Ukraine
  • В. П. Орловский A.N. Podgorny Institute for Mechanical Engineering Problems of NAS of Ukraine, Ukraine
  • А. С. Ковалев A.N. Podgorny Institute for Mechanical Engineering Problems of NAS of Ukraine, Ukraine
  • А. В. Нечаев A.N. Podgorny Institute for Mechanical Engineering Problems of NAS of Ukraine, Ukraine

Keywords:

steam turbine, mathematical model, ionization, nonequilibrium, condensation jump, experimental test bench, efficiency

Abstract

The main features of the developed mathematical model and program complex designed on its basis that allows calculating the parameters of no equilibrium vapor condensation for the channels of adjusted geometry, taking into account volume condensation on both homogeneous and heterogeneous embryos are studied. It was found that the change in absolute values of the pressures along the flow of the nozzle obtained by calculation is in good coincidence with the experimental data. It is stated that a number of experimental studies to determine the effect of heterogeneous condensation nuclei obtained by ionization of vapor on the steam flow parameters in supersonic nozzles are carried out for the first time. For this purpose experimental bench with different capacity of steam generators were created; vapor ionizers of corona and barrier type were designed; convergent-diffuser supersonic nozzles with different Mach numbers were designed and manufactured. The possibility of reducing losses from hypothermia and condensation jumps by vapor ionization that can help to improve the efficiency and compartment’s power of wet steam stages of full-scale turbines is shown. It is found that the ionization efficiency of the steam is higher when pressure is higher and steam temperature is closer to its saturation line

Author Biographies

А. А. Тарелин, A.N. Podgorny Institute for Mechanical Engineering Problems of NAS of Ukraine

Corresponding Member of the National Academy of Sciences of Ukraine

А. С. Ковалев, A.N. Podgorny Institute for Mechanical Engineering Problems of NAS of Ukraine

PhD

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Published

2016-06-16

Issue

Vol. 19 No. 2 (2016)

Section

Power Engineering

License

Copyright (c) 2016 А. А. Тарелин, В. П. Орловский, А. С. Ковалев, А. В. Нечаев

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