Experimental research on ventilation at T10MW experimental steam turbine

This paper deals with flow through the experimental steam turbine T10MW under low positive or negative rotor output. The steam turbine was braked or powered by using the dynamometer. Totally 13 operational regimes were measured. Individual regimes vary in steam parameters – pressure, temperature - a...

Full description

Saved in:
Bibliographic Details
Main Authors: Tupý, David, Hoznedl, Michal
Format: Conference Proceeding
Language:English
Subjects:
Cooling
Cooling rate
Mass flow rate
Parameters
Spray cooling
Spraying
Steam flow
Steam turbines
Temperature probes
Thermometers
Trailing edges
Turbines
Water masses
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This paper deals with flow through the experimental steam turbine T10MW under low positive or negative rotor output. The steam turbine was braked or powered by using the dynamometer. Totally 13 operational regimes were measured. Individual regimes vary in steam parameters – pressure, temperature - at the turbine inlet and backpressure. As a part of experiments the mass flow rate of spray cooling water was also observed. The complication in this geometric steam turbine configuration is the presence of the two last stages and bypass channel. Results are evaluated with respect to the integral parameters of the flow part, which are flow rates, static pressures behind both last stages and especially the distribution of temperature along the blade length. These temperatures using thermometers and traversing temperature probe were measured. Measured results show significant differences in temperatures along the blade height as well as in axial direction. Differences are connected even with turbine regime and they can be up to tenths of centigrade. Differences are between last two stages as well. Steam flow in the lower half of blade has every time saturation temperature because of cooling water spraying compare to tip flow, which is superheated every time. Further increasing of cooling water mass flow doesńt lead to the tip steam cooling but the last stage blade trailing edges erosion.
ISSN:0094-243X
1551-7616
DOI:10.1063/5.0041416