Air-cooling accelerates the removal of heat, which increases the velocity of the air through the fan. Common forced convection mainly includes air-cooling and water-cooling. This method is low in cost and is only suitable for devices with low power density and no strict temperature requirements, because the heat dissipation capacity of this method is very limited. Among them, natural convection does not rely on external force fluid flows because of the temperature difference inside fluid, and the heat generated by the microelectronics is taken away and released. In the past few decades, heat dissipation has mainly been through natural and forced convection. According to statistics, 55% of electronic failures are caused by heat. It is essential to dissipate the heat accumulated inside electronics. With the rapid development of integrated circuits in terms of high integration and miniaturization, the thermal design power and heat flux of electronics are increasing. In addition, the heat dissipation performance of the rectangular, staggered fin (MC-SF), staggered rib (MC-SR) and cross-rib micro-channels were analyzed in the condition of the same pressure drop, MC-CR still has superior heat dissipation performance. When α = 30°, S = 0.1 mm, and λ = 4, the pressure drop was reduced from 22 kPa to 4.5 kPa. To reduce the pressure drop, the inclination (α) and spacing (S) of the cross-ribs were optimized. It was found that the aspect ratio and cooling performance were non-linear. Then, the effects of the aspect ratio (λ) of micro-channel in different flow rates were studied. Compared with the rectangular and horizontal ribs heat sink, the cross-rib micro-channel had improvements of 28.6% and 14.3% in cooling capability, but the pressure drop increased by 10.7-fold and 5.5-fold, respectively. The results show that, with the cross-rib micro-channel, the junction temperature of the thermal test chip was 336.49 K, and the pressure drop was 22 kPa. For a thermal test chip (TTC) with 100 w/cm 2, the cross-ribs micro-channel were compared with the rectangular (MC-R) and horizontal rib micro-channel (MC-HR) heat sinks. On this basis, analysis of the influence of body and inner-equipment on the flow resistance, which mainly includes the disturbance by the body, sticking effect of the body, the flow resistance by the low-pressure heater and so on, and gets the curve of steam flow resistance with the dimension of body structure and inner-equipment.This article presents a novel cross-rib micro-channel (MC-CR) heat sink to make fluid self-rotate. Influence proportion of different equipments was compared in flow resistance and flow state respectively. This paper puts forward a kind of micro modelling equipment of condenser-throat and gives the design project of the micro modelling experiment, and the feasibility analysis to the micro modelling equipment is studied. Combing with comparability principle, and on the premise of satisfying the same flow state, using the method of modelling blew, simulating the steam of turbine with flow air.
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