| Accurate measurement of flow is a more complicated issue, which is determined by the nature of flow rate. Flow media is liquid, gas, solid particles or their combination type. Liquid flow includes laminar flow and turbulent flow, it is steady-state flow or transient flow. Flow rate is a one of the primary parameter to be measured and controlled in industrial production, scientific experiments, energy metering and other fields in the daily life.Turbine flow meter is a velocity-type flow measuring instrument, it is widely used in metallurgy, petroleum, chemical, food, light industry and other high precision industrial areas because it has the character of high accuracy, good repeatability, better adaptability, and wide linear range. The research scientists has not been further interrupted since the first turbine flow meter is developed in United States in 1938. Formed by two parts mainly as to turbine flow meter: the turbine flow sensor and convertor. The research of this article mainly focuses on the design of the turbine flow sensor and the signal processing for the converter.The research of this paper is divided into the following aspects: First, this paper analyses the working principle of the turbine flowmeter and mathematical model and the reason of the error influencing measurement results. Secondly, this paper introduces experimental equipment of the turbine flow sensor. The improving methods of flowmeter sensor are presented by analysising the diversity of experimental results of the turbine flow meter.Finally, Fluent is applied to the simulation of turbine flow sensor ,which is one of the software: Computational Fluid Dynamics (CFD). A likely mesh division method is obtained, the optimal simulation model of turbine flowmeter is found. The main factors affecting measurement accuracy of the turbine flowmeter is obtained by simulation study. The result indicates that the FLUENT is an effective optimization tools to improve the measure precision of the turbine flowmeter. |
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