CFD Simulation Study on Heat Generation and Cooling of Geotechnical Centrifuge under Low Pressure
With the development of geotechnical centrifuge toward high-speed and mega-scale,accurate estimation of internal heat generation and rational design of external heat dissipation structures have become important prerequisites for the development of centrifuges.In this paper,a CFD numerical simulation mode is established based on the rotating reference frame method(MRF).The internal flow field and temperature field distribution of the geotechnical centrifuge during stable operation are explored.The effect of reducing the pressure on reducing the temperature in the chamber is studied.The results show that the wind resistance power decreases linearly with the decrease of air pressure,and when the air pressure in the cabin decreases from normal pressure to 10000Pa and 2000Pa,the average temperature in the cabin decreases by 1.7 K and 4.8 K respectively.Finally,the research object is extended to the external heat dissipation structure,and the coupled heat transfer model of the geotechnical centrifuge and the radiator is established.Providing a simulation basis for accurately estimating the internal temperature rise of the centrifuge and designing and optimizing the external heat dissipation structure.
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