基流对热对流涡旋结构影响的实验结果初步分析

用实验室模拟方法研究了径向温度梯度对热对流涡旋的影响,结果表明,径向温度梯度所引起的基流使热对流涡旋的对称性结构被破坏,使涡旋变成非对称结构,并使涡旋向基流下游偏移,其强度随基流的加强而减弱,直至消失.热对流涡旋越强其对称性结构越稳定,基流对它的影响越小 关键词： 转盘实验 基流 热对流涡旋

An laboratory simulation study on the effect of radial temperature gradient on the structure of the thermal convextion vortex in the rotating fluid

An experimental study about the effect of radial temperature gradient on the thermal vortex in the rotating fluid flows is outlined. The photos of the low height structure of the vortexes have been taken with a camera with a laser and the qualitative analysis about the inner structure of the thermal vortex acted on by the radial temperature gradient is accomplished. The following results have been gotten:1.The structure of the thermal vortex in a container on the rotating plate is a axisymmetric cyclonic vortex with a central eye.2.The cyclonic vortex becomes asymmetric under the action of the basic flow. Furthermore, the vortex center has a displacement along the flow and the intensity of vorticity fades.3.The stronger the intensity of vortex, the more stationary the vortex, and the effect of the basic flow is weakened.