A shielded hot-wire probe to detect flow reversals with one-dimensional pulsating flow

Abstract

A shielded hot-wire probe, based on the patent of Neuerburg, was further developed to detect flow reversals in a one-dimensional pulsating flow regime for frequencies of 66 and 100 Hz. This single-sensor hot wire, partially surrounded by a tubular shield with an oblique tip, has successfully detected the intermittent flow reversals caused by the flow interruption device in a pulsating air flow rig. For the purpose of reverse flow detection, this shielded single-sensor hot-wire probe provides a cost effective and simple-to-use alternative to multisensor hot-wire probes and optical velocity measurement devices such as laser Doppler anemometry.