Thermodynamic Model and Dynamic Temperature Compensation in Positive-Pressure-Based Sonic Nozzle Gas Flow Standard
Thermodynamic Model and Dynamic Temperature Compensation in Positive-Pressure-Based Sonic Nozzle Gas Flow Standard
复制标题
正压音速喷嘴气体流量标准中的热力学模型和动态温度补偿
DOI：
10.1109/tim.2012.2234599
复制
发表时间：
2013-01
影响因子：
5.6
通讯作者：
Wang, Huaxiang
中科院分区：
文献类型：
--
作者：
Wang, Chao;Ding, Hongbing;Wang, Huaxiang
高精度热电阻在音速喷管气流标准装置中应用非常广泛。为了获得真实的瞬态温度和最小化温度对流动不确定性的影响，提出了流动温度现象的热力学模型，并与实验测量结果进行了比较。利用FLUENT软件进行了数值模拟，分析了实验测量值与模型计算值之间的差异。分析表明，这种差异主要来自于滞止槽内的温度分布。此外，这种差异可以忽略不计。为了降低测量不确定度，提出了一种动态温度补偿方法，即采用最小二乘估计法和小波滤波算法求解热阻的实际模型和逆模型参数。将补偿器的输出与热力学模型得到的真实瞬态温度进行比较，证明了该补偿方法的准确性和有效性。
High-precision thermal resistances are very often used in the sonic nozzle airflow standard facilities. In order to obtain the true transient temperature and minimize temperature effects on flow uncertainty, a thermodynamic model for flow temperature phenomena was presented and compared with experimental measurements. Numerical simulations using the software of FLUENT were carried out to analyze the difference between the experimental measurements and the model results. The analysis showed that such difference came from the temperature distribution in the stagnation tank. In addition, such difference could be ignored. In order to reduce the measurement uncertainty, a dynamic temperature compensation, which solved the actual model of thermal resistances and parameters of inverse model by least squares estimation method and wavelet filtering algorithm, had been presented. Comparing the output of the compensator with the true transient temperature obtained by the thermodynamic model, it proved the accuracy and the effectiveness of this compensation method.
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影响因子：
2.2
作者：
P. Wright
通讯作者：
P. Wright
DOI：
10.1016/j.proeng.2011.11.2439
发表时间：
2011
期刊：
Procedia Engineering
影响因子：
--
作者：
Shuncai Yao;Rule Gao
通讯作者：
Shuncai Yao;Rule Gao
影响因子：
1.6
作者：
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通讯作者：
M. Tagawa;Kenji Kato;Y. Ohta
DOI：
--
发表时间：
2000-06
期刊：
--
影响因子：
--
作者：
J. Wright;A. Johnson
通讯作者：
J. Wright;A. Johnson
影响因子：
1.6
作者：
P. Hung;G. Irwin;R. Kee;S. McLoone
通讯作者：
P. Hung;G. Irwin;R. Kee;S. McLoone