Annular micro-channel heat exchanger and fluid flow heat exchange experimental device thereof

The invention discloses an annular micro-channel heat exchanger and a fluid flow heat exchange experimental device thereof. The annular micro-channel heat exchanger comprises a substrate and two U-shaped grooves, wherein the two U-shaped grooves are engaged with the two opposite sides of the substrate respectively; the substrate comprises an upper cover plate and a lower cover plate; the lower cover plate is provided with four channels; each of the channels consists of a primary flow channel, a secondary annular flow channel and inclined flow channels; the primary flow channel of each channelis divided into two parts which are disposed on two ends of the lower cover plate respectively; the corresponding secondary annular flow channel is connected between the two parts; the inclined flow channels are disposed in the middle area of the secondary annular flow channel; the upper cover plate and the lower cover plate are closed to make each channel be an enclosed independent space with twoopen ends; and a straight