Investigation on Convective Heat Transfer over a Rotating Disk with Bottom Wall Subjected to Uniform Heat Flux

摘要: A three-dimensional numerical study on the flow and heat transfer characteristics over a rotating disk with bottom wall subjected to uniform flux was conducted use of RNG k- turbulent model. And some experiments were also made for validation. The effects angular speed pin configuration temperature maps convective characte-ristics surface are analyzed. As increase velocity, impingement pumping jet centre became stronger transition from laminar turbu-lent occurred at outer radius disk, which resulted in enhancement. pins action weaker. Simultaneously, they acted as disturbing elements cyclone near surface, overall be enhanced. Under same extend areas different pins, needle has higher capacity than discrete ring pin.