Development of a nanoscale hot-wire probe for supersonic flow applications

K. Kokmanian, S. Scharnowski, M. Bross, S. Duvvuri, M. K. Fu, C. J. Kähler, M. Hultmark

    Research output: Contribution to journalArticlepeer-review

    11 Scopus citations

    Abstract

    Abstract: A new nanoscale thermal anemometry probe (NSTAP) was designed and fabricated to measure mass flux in supersonic flows. This sensor was evaluated in the Trisonic Wind Tunnel Munich (TWM) at both subsonic and supersonic speeds. Subsonic compressible flow tests were performed to confirm the new sensor’s repeatability and to compare its behaviour to measurements from a conventional cylindrical hot-wire, while supersonic tests were performed to investigate the nature of the convective heat transfer from the nanoscale sensor at those conditions. For the range of mass fluxes tested in the supersonic regime, a linear relationship between the Nusselt number and the Reynolds number fit the data well. A linear relationship has previously been noticed at length scales close to the molecular mean free path of the flow and has been attributed to the free-molecule flow regime, where the Knudsen number is on the order of unity. Graphical abstract: [Figure not available: see fulltext.].

    Original languageEnglish (US)
    Article number150
    JournalExperiments in Fluids
    Volume60
    Issue number10
    DOIs
    StatePublished - Oct 1 2019

    All Science Journal Classification (ASJC) codes

    • Computational Mechanics
    • Mechanics of Materials
    • General Physics and Astronomy
    • Fluid Flow and Transfer Processes

    Fingerprint

    Dive into the research topics of 'Development of a nanoscale hot-wire probe for supersonic flow applications'. Together they form a unique fingerprint.

    Cite this