0230 周期パルス加熱式熱線流速計を用いた乱流計測(OS2-6 乱流の計測・解析・制御,オーガナイズドセッション)

抄録

A constant temperature hot wire anemometer includes a feedback circuit that needs proper care for influence from surrounding electrical noises and its stability. We have developed a novel hot wire anemometer with periodic pulse heating and tested it for a jet flow measurement. The principle of the anemometer is that flow velocity is estimated from rate of thermal decay of a hot wire sensor so that a feedback circuit is unnecessary. Other advantages of this anemometer are less influence of the fluid temperature and small effective volume of the thermal field to determine the measured velocity. The test measurements indicate enough accuracy for a dynamic measurement of flow velocity, compared with a constant temperature hot wire anemometer.