一种基于反问题算法的管道壁面热流密度测量技术  

A Method for Measuring Duct Wall Heat Flux Based on Inverse Problem Algorithm

作　　者：吴洪潭[1] 崔志尚[1] 许祝安[2] 

机构地区：[1]中国计量学院计量技术工程学院,浙江杭州310018 [2]浙江大学物理系,浙江杭州310027

出　　处：《计量学报》2007年第3期237-238,287,共3页Acta Metrologica Sinica

基　　金：国家自然科学基金(10225417)

摘　　要：为了解决目前传统测量方法中无法准确计量热流密度的问题,在已知管道内沿层流的几处不同点的测温数据的基础上,建立了热流密度计量的反问题数学模型,采用共轭梯度法,给出了简明的热流测量步骤。数值实验表明,在存在较大温度测量误差的情况下,这种方法仍具有较高的计量精度。It is difficult to measure the duct wall heat flux accurately with traditional methods. A new inverse problem model of measurement of heat flux is developed, based on the temperature reading taken inside the fluid at different locations along the flow. A straightforward approach is presented by conjugate gradient method. The numerical results show that, this method has a high accuracy even though there are large measuring errors in temperature.

关 键 词：计量学 热流密度 反问题 共轭梯度法 测量误差 

分 类 号：TB941[一般工业技术—计量学]