G101 熱流体用のデジタル計測システムにおける動的補償システムの高精度化(GS1-流体一般,一般セッション)

概要

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The high-accuracy simultaneous measurement of temperature and velocity fields was realized by employing FPGA (Field Programmable Gate Array) digital device. The temperature compensation was indispensable for the velocity measurement owing to the velocity and temperature dependence of the hot-wire anemometer in the thermally stratified flow fields. The instantaneous velocity and temperature were simultaneously measured through compensating the velocity information based on the temperature information. The accuracy of the velocity measurement at high temperature was improved with the strict algorithm of the temperature compensation which considered the temperature dependence of the thermal properties of the air. The high-accuracy velocity measurement was realized within the accuracy of ±1.6% in the temperature range of 1.5 times as wide as that of the previous method by the thermo-anemometer with digital dynamic compensation system.
2010-10-29