Device and experimental method for visualization research on labyrinth channel in high pressure regulating valve

Abstract

The invention discloses a device for the visualization research on a labyrinth channel in a high pressure regulating valve, which is composed of five parts including a water flow-pressure adjusting system, a test system, particle release and recovery devices, a visualized labyrinth channel and an imaging system; one end of a steel pipe is immersed in a circulating water pool while the other end thereof is sequentially connected with a centrifugal pump, a turbine flowmeter, an inlet pressure gauge, a particle release device, visualized labyrinth channel, an outlet pressure gauge and a flow regulating valve, the tail end of the steel pipe is butt-jointed with the tracer particle recover device above the circulating water pool, the circulating water pool is internally provided with a thermometer. The visualized labyrinth channel is disposed horizontally, a high-speed camera is horizontally disposed above the visualized labyrinth channel, and the front part of an aperture of the high-speed camera is equipped with a 90-degree reflector. According to the invention, motion track of tracer particles in a flow field is recorded by means of high-speed photography, so clear images with comprehensive information about fluids flowing in the channel can be acquired, the device and the experimental method can not only be used for verifying the reliability of other research methods, but are also favorable for the optimized structural design of the channel.

Description

Technical field [0001] The invention relates to a device and an experimental method for visualizing the labyrinth channel inside a high-pressure regulating valve by using high-speed photography, and belongs to the technical field of fluid dynamic testing. Background technique [0002] The main way to improve the efficiency of coal utilization in power plants is to improve the steam parameters of power generation equipment. With the advancement of science and technology, the steam parameters of coal power have developed to supercritical and high-temperature ultra-supercritical. The high-pressure regulating valve is an important flow control device for the boiler feed water pump recirculation system, and its reliable operation will directly affect the safety of the entire unit. When the high-pressure regulating valve throttles and lowers the pressure under the conditions of high temperature and high pressure, it is easy to produce flashing and cavitation problems, and the resultin...

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Problems solved by technology

[0004] But so far, the device and experimental method for visualizing the labyrinth flow channel inside the high-pressure regulating valve by using high-speed photography, as well as related technical contents have not been reported.

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