Simultaneous measurements of velocity, gas concentration, and temperature by way of thermal-anemometry-based probes

Abstract Many natural and engineering flows transport more than one scalar. Moreover, to study the scalar mixing therein, knowledge of velocity field is also essential. For this reason, present work describes development a three-wire thermal-anemometry-based probe simultaneously measure velocity, helium concentration, temperature in turbulent flows. It first demonstrated, both theoretically experimentally, that measured by cold-wire thermometer effectively insensitive concentration. Then, building on recent Hewes Mydlarski (2021 Meas. Sci. Technol. 32 105305), which pertains design interference probes (i.e. used gas concentration), novel compensation technique proposed extend their use non-isothermal The performance validated coaxial jets combining form probe. Given can be employed obtain simultaneous measurements multiple scalars, it therefore investigate phenomena such as multi-scalar mixing, including differential diffusion.