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UID:0-186@aerospace.technion.ac.il

DTSTART;TZID=Asia/Jerusalem:20220209T013000

DTEND;TZID=Asia/Jerusalem:20220209T023000

DTSTAMP:20230108T145338Z

URL:https://aerospace.technion.ac.il/events/high-speed-hot-wire-anemometry
 -towards-independent-characterization-of-instantaneous-flow-quantities-wit
 h-minimal-calibration/

SUMMARY:High-speed Hot-Wire anemometry towards independent characterization
  of instantaneous flow quantities with minimal calibration
DESCRIPTION:Lecturer:Yonit Goren Zaslavsky\n Faculty:Department of Aerospac
 e Engineering\n Institute:Technion – Israel Institute of Technology\n Lo
 cation:https://technion.zoom.us/j/91960400649\n Zoom: \n Abstract: \n Deta
 ils: \n Hot Wire Anemometry (HWA) methodology has yet to fully realize its
  potential. As a consequence\, nowadays\, the use of HWA is unapplicable t
 o flow conditions in the range of 0.4&lt\;M&lt\;1.2. This research aims to
  address this gap by extending the use of HWA to cover the compressible fl
 ow range typical in turbomachinery applications.\nThis research proposes a
  novel method to decouple and obtain the instantaneous characteristics of 
 the flow\, for an incompressible and supersonic field using HWA probe with
  at least 3 wires. The sensitivities of the velocity\, Temperature and den
 sity\, to the electrical voltage applied on the wire  \, are obtained fro
 m normalized characteristics of the flow ( \,  and ). Using a calibration
  process Reynolds-Nusselt curve is generated. This calibration can be cond
 ucted in a free jet facility without the need of a complex closed loop win
 d tunnel. Using a probe with slanted wires\, a decouple of the flow angles
  can be obtained\, by calibrating the ratio between the free stream Reynol
 ds and the effective Reynolds on the wire to the flow angle.\n5 Wire HWA w
 as created to demonstrate the capabilities of the probe towards conducting
  an experiment on an engine. Optimization was used to set the best wire pr
 operties such as wire temperature and diameter to maximize the accuracy of
  the results.\nA probe calibrated in this manner can therefore provide acc
 urate instantaneous data of small fluctuations in the flow and can potenti
 ally lead to a breakthrough in the research and development of state-of-th
 e-art turbomachinery applications.
CATEGORIES:Seminars
LOCATION:https://technion.zoom.us/j/91960400649

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