Horizontal non-uniform indirect heating rectangular channel flow visualization test apparatus

Abstract

The invention discloses a horizontal non-uniform indirect heating rectangular channel flow visualization test apparatus. The apparatus consists of a flow channel body module, a power loading module and a clamping fixing module. By conveniently adjusting an output power of each electric heating element, horizontal heat flow distribution with different forms is realized according to research needs. The test apparatus can be used to carry out a flow visualization test research of a rectangular narrow-slit flow channel under horizontal non-uniform heat flow working conditions, influences of thermal parameters such as pressure, temperature, flow volume and horizontal heat load distribution, and corresponding geometric parameters on flow characteristics in the narrow-slit channel are studied, and corresponding bubble dynamic characteristics and flow pattern transition criteria are obtained. At the same time, the test apparatus can obtain detailed flow field and temperature field information by combining with advanced measuring equipment and testing means. In addition, the test apparatus is designed with the reasonable clamping fixing module to ensure that the test apparatus can be operated within a wide range of thermal parameters to meet test working condition demands of different engineering under practical application backgrounds.

Description

technical field [0001] The invention belongs to the technical field of nuclear reactor thermal fluid experiment research in the field of energy and power engineering, and in particular relates to a flow visualization test device for non-uniform heating of plate-shaped fuel elements in a rectangular channel in the transverse direction. Background technique [0002] With the increasing application of nuclear energy technology, research on small and medium-sized nuclear power units and multi-purpose reactors such as combined heat and power is developing faster and faster. Because the integrated reactor is especially suitable for small-scale nuclear power plants in terms of technology and economy, and fully meets the safety requirements of future nuclear power. At the same time, because the integrated structure is to connect the pressure vessel, steam generator and main pump of the reactor into a whole, all parts of the reactor are a complete combination, which makes the reactor...

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Problems solved by technology

However, its research object is aimed at cylindrical nuclear fuel rods, and it is applied to the experimental research on critical heat flow of nuclear fuel assemblies, so it is difficult to extend to rectangular channels commonly used in engineering applications; Non-uniform heat release instead of lateral non-uniform thermal effects

Therefore, the simulation device and its test method cannot be applied to the experimental research on the flow and heat transfer characteristics of the transverse non-uniform heating rectangular channel

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