流体中速度场检测方案(粒子图像测速)
检测样品
其他
检测项目
速度场
关联设备
共3种
方案详情文
We report particle image velocimetry measurements of the collision of a vortex ring with a heated
wall kept at constant temperature. We consider the case when both the vortex ring and the thermal
boundary layer generated by the vertical heated wall are stable and laminar prior to any interaction.
The impingement process can be divided into two parts. sid A ring-driven stage, where the vortex
ring grows in diameter while approaching the wall and therefore it sweeps progressively an
increased surface on the wall. siid A boundary layer-driven stage, where the vortex ring moves
upward due to the thermal convective motion generated by the heated wall. In some cases, the
head-on collision triggers the ring’s azimuthal instability as revealed by the formation of vortical
structures arranged on a wavy starlike pattern and confirmed by flow visualizations. A single
collision generates important velocity gradients and shear stresses along the wall accompanied with
the creation of local vorticity normal to the vertical heated wall. Peak wall shear stresses occur near
the point of impact of the vortex ring core.
北京欧兰科技发展有限公司为您提供《流体中速度场检测方案(粒子图像测速)》,该方案主要用于其他中速度场检测,参考标准《暂无》,《流体中速度场检测方案(粒子图像测速)》用到的仪器有德国LaVision PIV/PLIF粒子成像测速场仪、三维立体PIV、Imager sCMOS PIV相机。
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