Dynamic test system and method for heating and dehumidification of stationary blade

Abstract

The invention discloses a dynamic test system and method for heating and dehumidification of a stationary blade. The system comprises a cascade flow field main system, a heating steam subsystem, a circulating cooling system and a test observation system. The cascade flow field main system is supplied with steam by a steam generator and is used for simulating the actual flow field condition of a steam turbine stationary blade. The heating steam system is supplied with steam by the steam generator and is used for heating and dehumidifying the static blade of the test section. The circulating cooling system is used for condensing the steam into water and continuously circulating in the cascade flow field main system. The test observation system is used for regulating and controlling test operation parameters, and observing and recording the water film state on the surface of the stationary blade and the size and quantity of secondary water drops at the outlet of the stationary blade. According to the method, the steam turbine wet steam stage pressure, humidity and various flow parameters of a cascade are modeled, the static blade outlet surface water film state and the static blade outlet secondary water drop state are measured, the steam turbine static blade heating and dehumidification effect is verified, and reliable dynamic test data is provided for dehumidification research.

Description

technical field [0001] The invention belongs to the technical field of industrial equipment and steam turbine vane dehumidification, and specifically relates to a dynamic test system and method for heating and dehumidification of stationary vanes, which are applied to data testing and verification of the heating and dehumidification of vane heating and dehumidification in wet steam stages of steam turbines. Background technique [0002] A steam turbine is a typical turbomachinery. The high-temperature and high-pressure steam drives the blades to rotate and output shaft work. It is one of the main equipment in thermal power plants and nuclear power plants. In the wet steam stage of the steam turbine, especially the last few stages of low pressure, the steam will gradually condense to produce water droplet particles, which will adhere to the surface of the stator blade to form a water film. Driven by the high-speed airflow, the liquid film will tear and generate secondary wate...

AI Technical Summary

Problems solved by technology

[0004]According to the existing public information, most of the current research methods on heating and dehumidification remain in the theoretical research stage, lacking examples of engineering applications

Moreover, steam heating and dehumidification involves a complex phase-change heat process, which is affected by many aspects such as heating channel design and heating steam parameter selection. Therefore, there are few researches on engineering tests at this stage, and there is a lack of reliable dynamic test data. It is urgent to develop a Accurate and credible dynamic testing methods that can well simulate actual operating conditions

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