Abstract
We propose a novel probe for turbulence measurement of two velocity components. The probe is composed of a hot-wire and a group of cold-wires. The normal hot-wire placed upstream is used not only to measure an instantaneous velocity magnitude but to operate as a heat source. On the other hand, the group of cold-wires placed downstream is used to detect a thermal wake formed behind the upstream hot-wire. By applying the Gaussian interpolation technique to the cold-wire outputs to find the position of a maximum temperature rise, we can also measure an instantaneous vector of fluid velocity. The proposed technique is examined in a cylinder wake flow at x/d = 40 (Red ≃ 2500). The measurement results of the longitudinal and lateral rms velocities and the Reynolds shear stress are quite reasonable. It is found that a response compensation of cold-wires is indispensable for an accurate flow-direction measurement in turbulent flows.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: The Proceedings of Mechanical Engineering Congress, Japan
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
