Abstract
This paper describes the measurement of thermal strains and temperatures in a 0.25-scale aluminum-filled epoxy model of a double-flow large-steam-turbine nozzle chamber. A temperature gradient was induced by circulating chilled methyl alcohol through the interior. Strain gages and thermocouples were used to determine surface strains and temperatures at various locations for comparison with a finite-element analysis under development. A uniform cylinder was included on the inlet section of the model for calibration. The maximum measured tensile strain on the interior surface was 0.96 αΔT n , where ΔT n was the average temperature difference between the interior surface and the initial temperature. A maximum compressive strain of 0.50 αΔT n was measured on the outside surface of the nozzle-bowl sidewall.
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Marloff, R.H. Thermal tests of a steam-turbine nozzle-chamber model. Experimental Mechanics 19, 399–405 (1979). https://doi.org/10.1007/BF02324505
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DOI: https://doi.org/10.1007/BF02324505