ガス温度変化に対する熱線流速計の出力補正

抄録

This paper describes the practical compensation method of the output of hot-wire anemometer (constant temperature type) for the variation of gas temperature.
The experiments were made in steady air flow under several conditions of the diameter and length of hot-wire, the mean temperature of hot-wire, the gas temperature and the air stream velocity.
The thermal equilibrium for a hot-wire (electrically heated wire) normal to gas stream was examined; the convective heat transfer to gas and the conductive heat flow to the supports of the wire were investigated, and an empirical relation between Nusselt number and Reynolds number was obtained.
Further, a compensation method with the calibration constants of an anemometer obtained under atmospheric condition was proposed.