Turbulence intensified heat transfer device for dynamically controlling cylindrical vortex generator and working method of turbulence intensified heat transfer device

Abstract

The invention discloses a turbulence intensified heat transfer device for dynamically controlling a cylindrical vortex generator and a working method of the turbulence intensified heat transfer device. The device comprises the cylindrical vortex generator, sealing devices and dynamic control structures, wherein the cylindrical vortex generator comprises a plurality of rows of cylinders arranged ona heat transfer surface; the bottom of each cylinder is connected with one dynamic control structure arranged in the heat transfer device; one sealing device is arranged between each cylinder and theheat transfer surface; and the dynamic control structures can control the cylinders to stretch out and draw back from the heat transfer surface. The dynamic vortex control technology is adopted for achieving dynamic control over changes of flowing vortexes, dynamic mechanical control and flowing heat transfer are combined, the included angle between the flowing direction and the fluid temperaturegradient is reduced through a dynamic turbulent flow effect, and therefore the convection heat exchange capacity is effectively improved, the phenomenon of local heat transfer deterioration can be avoided, and the dynamic control capability is high.

Description

technical field [0001] The invention belongs to the technical field of heat exchangers, and in particular relates to a turbulence enhanced heat transfer device for dynamically controlling a cylindrical vortex generator and a working method thereof. Background technique [0002] A heat exchanger is a device that transfers heat from one heat-carrying medium to another. All walks of life have different requirements for heat exchanger performance, so various heat exchanger structures are designed and applied. The field of hypersonic engines has a great demand for high-efficiency heat exchangers. [0003] In the field of aeroengines, different positions of the engine room wall may suffer from extremely high dynamic heat flux density. The traditional method of improving heat transfer capacity is to use fixed vortex generators to enhance heat transfer capacity. However, due to the dynamic change of the heat flux, the fixed vortex generator can no longer meet the demand, and becau...

AI Technical Summary

Problems solved by technology

However, due to the dynamic change of the heat flux, the fixed vortex generator can no longer meet the demand, and because the fixed vortex generator cannot dynamically change the structure of the vortex generator with the change of the heat flux, the flow generates many unnecessary energy consumption

For example, when the heat flux density is reduced, if a larger size vortex generator is used, although the heat exchange capacity meets the requirements, it will cause serious energy loss at the same time.

Otherwise, the requirements cannot be met

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