用于高温高压剪切流场的Gardon计研制
发布时间：2018-09-18 17:56
【摘要】：传统Gardon计一般为薄壁康铜片结构,通常应用于辐射热流的测量。当应用在高压对流环境中,存在承压能力不足、受对流加热不均匀性影响的问题。从Gardon计基本原理出发,以数值仿真分析了康铜箔厚度对传热特性的影响,推导了对流环境测量误差与对流换热系数和灵敏度系数的明确显式关系;并利用数值计算验证了其正确性。根据理论分析,设计并研制了适用于电弧风洞流场的Gardon计和复合型热流传感器,后者集成了Gardon计和水卡计的功能,可同时用两种方法测量表面热流。标定实验结果显示,传感器样件均具有较好的线性度(小于1.5%)和时间常数,水卡计经固定系数修正后与标准热流相对误差小于3.7%,当戈登计受对流换热影响较大时,可为其提供参考。
[Abstract]:Conventional Gardon gauges are generally thin-walled constantan sheets, which are usually used to measure radiant heat flux. When they are used in high-pressure convective environment, there are problems such as insufficient pressure bearing capacity and the influence of convective heating nonuniformity. The relationship between ambient measurement error and convective heat transfer coefficient and sensitivity coefficient is explicit, and its correctness is verified by numerical calculation. Based on theoretical analysis, Gardon meter and composite heat flow sensor for arc wind tunnel flow field are designed and developed. The calibration results show that the sensor samples have good linearity (less than 1.5%) and time constant. The relative error between the calibrated water calorimeter and the standard heat flow is less than 3.7% after the correction of the fixed coefficient. When the Gordon meter is greatly affected by convective heat transfer, it can provide a reference for it.
【作者单位】： 四川大学制造科学与工程学院;中国空气动力研究与发展中心;
【分类号】：O551.3
本文编号：2248674
[Abstract]:Conventional Gardon gauges are generally thin-walled constantan sheets, which are usually used to measure radiant heat flux. When they are used in high-pressure convective environment, there are problems such as insufficient pressure bearing capacity and the influence of convective heating nonuniformity. The relationship between ambient measurement error and convective heat transfer coefficient and sensitivity coefficient is explicit, and its correctness is verified by numerical calculation. Based on theoretical analysis, Gardon meter and composite heat flow sensor for arc wind tunnel flow field are designed and developed. The calibration results show that the sensor samples have good linearity (less than 1.5%) and time constant. The relative error between the calibrated water calorimeter and the standard heat flow is less than 3.7% after the correction of the fixed coefficient. When the Gordon meter is greatly affected by convective heat transfer, it can provide a reference for it.
【作者单位】： 四川大学制造科学与工程学院;中国空气动力研究与发展中心;
【分类号】：O551.3
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本文编号：2248674
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