一种热式气液流量测量技术的仿真与研究

Simulation and Research of Thermal Gas and Liquid Mass flow Measurement Technique

依据能量守恒原理和流量测量原理,提出了一种新型热式气液质量流量的测量方法,并基于方法设计了相应的热式气液质量流量计。对其进行数值模拟,研究了流量计在不同流速下的温度分布情况,分析和比较了不同流速下的导热杆上下端温度传感器的温差值,获得了适用的量程值。最后,对流体管内湍流换热过程进行分析,并对测量方法进行了测量精度的定量分析,分析结果显示其测量精度可达到98%,符合工程应用要求。计算结果为该热式气液质量流量计的设计、优化、定型提供了重要的参考依据。

The measurement method of a Thermal Gas and Liquid Mass Flow Meter （TMF）was obtained in the present study according to the conservation law of energy and the principle of flow rate t, and a Thermal Gas and Liquid Mass Flow Meter was designed based on the method. Through numerical simulation, the temperature distribution of TMF designed was investigated, under conditions of various flow velocityes. The temperature difference between the transducers at top and bottom of the thermal conductive probe under different flow velocity was analyzed and compared, and the corresponding measuring ranges were determined. Finally, the process of turbulent heat transfer in the flow pipe was simulated, and the accuracy of the measurement method was analyzed quantitatively. The results showed that the measurement accuracy was up to 98%, which is well in agreement with the requirements for engineering application. The present results could provide important reference for design, optimization and finalization of TMF.