TY - JOUR
T1 - Design and validation of a nanoscale cross-wire probe (X-NSTAP)
AU - Fu, Matthew K.
AU - Fan, Yuyang
AU - Hultmark, Marcus Nils
N1 - Funding Information:
Acknowledgements This work was supported by under NSF Grant CBET-1510100 (program manager Ron Joslin) and the Office of Naval Research (ONR) Grant N00014-17-2309. M. K. F. was supported by the Department of Defense (DoD) through the National Defense Science and Engineering Graduate Fellowship (NDSEG) Program. The authors would like to thank Dan Hoffman and Janik Kiefer for their assistance in aligning and assembling the Princeton Superpipe facility and instrumentation. The authors would especially like to thank Prof. Alexander Smits for his indispensable insight and assistance. All probes were manufactured in the Micro/Nano Fabrication Laboratory (MNFL) at Princeton University.
Publisher Copyright:
© 2019, Springer-Verlag GmbH Germany, part of Springer Nature.
PY - 2019/6/1
Y1 - 2019/6/1
N2 - Abstract: A nano-sized crossed thermal anemometer (X-NSTAP) was developed and validated for measurements of two-components of velocity at high Reynolds numbers. The new sensor design is based on the single-component nanoscale thermal anemometry probe (NSTAP) previously used to acquire streamwise velocity measurements at high Reynolds numbers. The new sensor can, simultaneously, measure two components of velocity with a spatial resolution of 42×42×50μm, an order of magnitude smaller in each dimension than conventional cross-wires. The new X-NSTAP design features several structural and manufacturing modifications to improve the aerodynamic performance of the sensor compared to previous nanoscale cross-wire designs. The effects of different manufacturing modifications were evaluated using dye visualizations over scale models of the sensor tip. The pitch sensitivity of the final sensor design was evaluated in an open-loop wind-tunnel and was comparable to the single-component NSTAP design. The X-NSTAP was then deployed in the Princeton Superpipe to acquire axial and radial velocity measurements up to friction Reynolds numbers, Reτ= 24 , 000 with good agreement to existing studies. Graphical abstract: [Figure not available: see fulltext.].
AB - Abstract: A nano-sized crossed thermal anemometer (X-NSTAP) was developed and validated for measurements of two-components of velocity at high Reynolds numbers. The new sensor design is based on the single-component nanoscale thermal anemometry probe (NSTAP) previously used to acquire streamwise velocity measurements at high Reynolds numbers. The new sensor can, simultaneously, measure two components of velocity with a spatial resolution of 42×42×50μm, an order of magnitude smaller in each dimension than conventional cross-wires. The new X-NSTAP design features several structural and manufacturing modifications to improve the aerodynamic performance of the sensor compared to previous nanoscale cross-wire designs. The effects of different manufacturing modifications were evaluated using dye visualizations over scale models of the sensor tip. The pitch sensitivity of the final sensor design was evaluated in an open-loop wind-tunnel and was comparable to the single-component NSTAP design. The X-NSTAP was then deployed in the Princeton Superpipe to acquire axial and radial velocity measurements up to friction Reynolds numbers, Reτ= 24 , 000 with good agreement to existing studies. Graphical abstract: [Figure not available: see fulltext.].
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U2 - 10.1007/s00348-019-2743-0
DO - 10.1007/s00348-019-2743-0
M3 - Article
AN - SCOPUS:85066260872
SN - 0723-4864
VL - 60
JO - Experiments in Fluids
JF - Experiments in Fluids
IS - 6
M1 - 99
ER -