TY - GEN
T1 - Advancements in measuring the wall-normal velocity fluctuations in a turbulent boundary layer
AU - Byers, Clayton P.
AU - Fu, Matthew K.
AU - Fan, Yuyang F.
AU - Kokmanian, Katherine A.
AU - Hultmark, Marcus N.
PY - 2017
Y1 - 2017
N2 - A novel velocity sensor has been developed and characterized for use in turbulent flows. The new strain-based sensor uses a freestanding nano-ribbon exposed to the flow, which results in a geometrically determined sensitivity to a single velocity component. A nano-ribbon deflects under the action of fluid forcing, causing an internal strain which can be calibrated to the fluid velocity. An anisotropic sensitivity to forcing enables measurements of turbulent fluctuations orthogonal to the free-stream flow using only one sensing element. The sensor is deployed in a turbulent boundary layer, with sensitivity to fluctuations in the wall-normal direction. Operation of the sensor is simple and, in contrast to constant temperature hot-wire anemometry, does not require a feedback circuit. The predicted frequency response is O(105)Hz, making the sensor an interesting alternative for turbulence measurements.
AB - A novel velocity sensor has been developed and characterized for use in turbulent flows. The new strain-based sensor uses a freestanding nano-ribbon exposed to the flow, which results in a geometrically determined sensitivity to a single velocity component. A nano-ribbon deflects under the action of fluid forcing, causing an internal strain which can be calibrated to the fluid velocity. An anisotropic sensitivity to forcing enables measurements of turbulent fluctuations orthogonal to the free-stream flow using only one sensing element. The sensor is deployed in a turbulent boundary layer, with sensitivity to fluctuations in the wall-normal direction. Operation of the sensor is simple and, in contrast to constant temperature hot-wire anemometry, does not require a feedback circuit. The predicted frequency response is O(105)Hz, making the sensor an interesting alternative for turbulence measurements.
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M3 - Conference contribution
T3 - 10th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2017
BT - 10th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2017
PB - International Symposium on Turbulence and Shear Flow Phenomena, TSFP10
T2 - 10th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2017
Y2 - 6 July 2017 through 9 July 2017
ER -