Development of subminiature multi-sensor hot-wire probes
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Authors
Westphal, Russell V.
Ligrani, Phillip M.
Lemos, Fred R.
Subjects
HOT-WIRE FLOWMETERS
MULTISENSOR APPLICATIONS
REYNOLDS STRESS
SUBMINIATURIZATION
TURBULENT FLOW
ACCURACY
ANISOTROPY
CALIBRATING
TURBULENT BOUNDARY LAYER
WIND TUNNEL TESTS
MULTISENSOR APPLICATIONS
REYNOLDS STRESS
SUBMINIATURIZATION
TURBULENT FLOW
ACCURACY
ANISOTROPY
CALIBRATING
TURBULENT BOUNDARY LAYER
WIND TUNNEL TESTS
Advisors
Date of Issue
1988-03
Date
Mar 01, 1988
Publisher
Language
Abstract
Limitations on the spatial resolution of multisensor hot wire probes have precluded accurate measurements of Reynolds stresses very near solid surfaces in wind tunnels and in many practical aerodynamic flows. The fabrication, calibration and qualification testing of very small single horizontal and X-array hot-wire probes which are intended to be used near solid boundaries in turbulent flows where length scales are particularly small, is described. Details of the sensor fabrication procedure are reported, along with information needed to successfully operate the probes. As compared with conventional probes, manufacture of the subminiature probes is more complex, requiring special equipment and careful handling. The subminiature probes tested were more fragile and shorter lived than conventional probes; they obeyed the same calibration laws but with slightly larger experimental uncertainty. In spite of these disadvantages, measurements of mean statistical quantities and spectra demonstrate the ability of the subminiature sensors to provide the measurements in the near wall region of turbulent boundary layers that are more accurate than conventional sized probes.
Type
Technical Report
Description
Series/Report No
Department
Organization
Ames Research Center
Identifiers
NPS Report Number
Sponsors
Funder
RTOP 505-60-31
Format
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.