Abstract
A dual-micro-wire probe, consisting of two consecutive coplanar cold and hot wires, has been developed for simultaneously measuring temperature and velocity fluctuations in turbulent aerothermal flows. Using a single sensor to perform these two simultaneous measurements presents significant challenges. One major issue is the temperature disturbance generated by the hot wire, which can influence the upstream cold wire's readings due to their proximity-limited to a maximum separation of 500 μm to ensure high spatiotemporal resolution. Additionally, the wake effect of the upstream cold wire can alter the flow conditions before reaching the downstream hot wire, potentially affecting measurement accuracy. In this study, we investigate these challenges through both numerical simulations and experimental analysis. Our results indicate that the temperature effect could be negligeable under certain forced convection conditions. Furthermore, we examine the upstream wire wake effect under varying sensor angles of attack, providing insights into optimizing sensor performance.