Model simulation method for liquid nitrogen flow in corrugated pipe of high-temperature superconducting cable

Abstract

A model simulation method for liquid nitrogen flow in a corrugated pipe of a high-temperature superconducting cable is characterized by comprising the following steps: 1, constructing a geometric model for the corrugated pipe of the high-temperature superconducting cable, and dividing grids for the geometric model; 2, performing numerical simulation on liquid nitrogen flow in the corrugated pipe by using a solver so as to calculate liquid nitrogen pressure drop data corresponding to different inlet speeds in the corrugated pipe; 3, repeating the step 1 and the step 2 for different corrugated pipes to obtain liquid nitrogen pressure drop data corresponding to different inlet speeds in the different corrugated pipes, and obtaining a change curve of the liquid nitrogen pressure drops and friction factors in the different corrugated pipes along with Reynolds numbers; 4, on the basis of the different change curves of the liquid nitrogen pressure drop and the friction factor in the corrugated pipe along with the Reynolds number, obtaining the influence rule of different factors of the corrugated pipe on liquid nitrogen flow and the influence rule of the different factors on the heat exchange effect of the corrugated pipe. The method provided by the invention can accurately provide simulation references of various different parameters on the flow characteristics of the liquid nitrogen in the corrugated pipe.

Description

technical field [0001] The invention relates to the field of superconducting cables, in particular to a model simulation method for the flow of liquid nitrogen in a bellows of a high-temperature superconducting cable. Background technique [0002] The application of superconducting technology in power systems is diverse, and it is also one of the main directions of superconducting application research in recent years. Compared with power cables, superconducting cables have great advantages, such as: strong power transmission capacity, cost saving, small footprint, extremely low line impedance, small transmission loss, and strong anti-magnetic interference ability; relatively low The voltage can be used for long-distance transmission, and it can also be transmitted underground to avoid noise, electromagnetic pollution and safety hazards caused by ultra-high-voltage high-altitude transmission, and to protect the ecological environment. [0003] At present, encapsulating high-...

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Problems solved by technology

However, most of the simulation methods are different from the experimental data, the accuracy of the simulation needs to be considered, and the reference value is not high

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