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| Non-contacting suspended temperature measuring device |
| RUAN Xiao-dong, CUI Xun-bo, ZOU Jun, ZHONG Wei-hua, CHEN Shui-xuan, FU Xin |
| (State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China) |
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Abstract A non-touching temperature device was developed based on air cushion aiming at the problems that the temperature measurement was easily disturbed by cooling water and vapor in laminar cooling region. The relations between the structural parameters, e.g. distance, area of lower surface and groove depth, and the suspending force of the nozzle and the pressure distribution on the surface of the strip were investigated by computational fluid dynamics (CFD). The effects of viscosity damping coefficient on response and stability were analyzed by dynamics models. The basic system parameters were determined. The developed device has the good self-adjusting ability for the distance and can stably suspend on the strip surface. The good performance was verified by the application of the device in the laminar cooling physical simulation system, in spite of the interference of cooling water, high speed moving and vibration of the target object.
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Published: 09 March 2010
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非接触式悬浮测温装置仿真与试验研究
针对层流冷却区温度测量易受冷却水、雾气干扰的问题,利用喷射的气体产生的气垫效应,开发了非接触式悬浮测温装置.采用计算流体力学(CFD)方法研究间距、喷嘴下缘面积和均压槽深度等关键结构参数对喷嘴受力、带钢表面气体压力分布的影响,通过动力学仿真研究黏性阻尼系数对悬浮的响应速度、稳定性的影响,并确定了非接触式测温装置的基本系统参数.开发的非接触式悬浮测温装置具有良好的间距自调节能力,能够稳定地悬浮在带钢表面.将该装置应用到某钢厂层流工况物理模拟系统中,结果表明,在冷却水扰动、被测物体高速移动和振动的恶劣工况下,该装置仍能取得满意的测量效果.
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