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基于传热方程的铂电阻器测温系统误差研究 被引量:1
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作者 张莉莉 贺晓雷 卢为 《传感器与微系统》 CSCD 北大核心 2012年第11期36-39,共4页
针对铂电阻器自热效应这一现象,通过理论分析铂电阻器在温度测量中所产生的误差。由此提出一种实验方法进行系统误差研究。铂电阻器测温环境是有限空间的空气罐,罐内压力控制在500~1 013 hPa,液体槽温度控制在-70~80℃之间。罐内的流... 针对铂电阻器自热效应这一现象,通过理论分析铂电阻器在温度测量中所产生的误差。由此提出一种实验方法进行系统误差研究。铂电阻器测温环境是有限空间的空气罐,罐内压力控制在500~1 013 hPa,液体槽温度控制在-70~80℃之间。罐内的流体视为自然流动的N2与O2的二元混合气体。利用传热学分析热量传递过程中能量耗散关系、热流密度分布状态以及混合气体的热物理性质,通过建立数学模型,运用Matlab进行仿真运算。结果表明:在上述温度、压力和微小电流的条件下,铂电阻器测温结果中存在-0.4~0.6℃误差。 展开更多
关键词 铂电阻器 效应 空气热物理性质 误差
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Solution of Modern Thermo Physical Problems of Applied External and Internal Aerodynamics with Dark Matter-Energy Simulation
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作者 Mikhail Ja. Ivanov 《Journal of Energy and Power Engineering》 2014年第5期812-825,共14页
The paper is devoted to new, experimentally registered thermo physical problems of high temperature applied external and internal aerodynamics which is defined first of all by intensive interaction of the gaseous medi... The paper is devoted to new, experimentally registered thermo physical problems of high temperature applied external and internal aerodynamics which is defined first of all by intensive interaction of the gaseous media and thermal radiation. The first report section analyses basic complexities of designing high temperature air breathing engines related to origin of so-called "unexpected" heat of working process. The next parts of the report consider physical, chemical and plasma features of aerodynamics of reentry space blunt bodies and meteors with specified account of thermal radiation influence. Our solutions are based on the classical Dark Matter-Energy simulation. We present special experimental data for Dark Matter pressure registration on the earth conditions. 展开更多
关键词 AERODYNAMICS thermal radiation air breathing engine blunt bodies dark matter pressure.
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