Results 21 to 30 of about 13,778 (223)

A method to improve accuracy of hot-wire probe calibration under variable temperature field

Journal of Measurement Science and Instrumentation, 2023
The probe calibration wind tunnel of IFA300 hot-wire anemometer system cannot complete the probe calibration at a given temperature and low flow rate, because the side wall of the calibration wind tunnel has high thermal conductivity.
WANG Ye, HU Jiazhi, GUAN Guoxiang
doaj  

Novel hot-wire based spirometry is highly accurate at low flow rates

Current Directions in Biomedical Engineering, 2018
Spirometry is the most commonly used pulmonary function test. The aim of this comparative study was to evaluate four commercially available spirometers with different measurement principles (turbine-, ultrasound-, differential pressure- and hot-wire ...
Perera Arshan, Friedrich Petra, Ledermüller Rosina   +2 more
doaj   +1 more source

Initial study of an alternative technology aimed at measuring and controlling the flow rate in air conditioning ducts

Advances in Mechanical Engineering, 2021
This paper states that there might have around 1000 small size business jets (until nine occupants) flying across the world equipped with flow control and regulating shut-off valves that uses hot wire anemometer devices to regulate massflow rate from the
Andrei Testi, Marcio Abud Marcelino, Francisco Antonio Lotufo, Teófilo Miguel de Souza   +3 more
doaj   +1 more source

An Automatic Optimiser for Air Flow Direction Measurement

Measurement + Control, 1968
A self-adaptive instrument servomechanism has been devised to enable airflow direction to be automatically determined when using a hot wire anemometer for flow measurements.
A. M. Porter BSc, P. L. Neely BSc, A. D. Bond BSc, PhD   +2 more
doaj   +1 more source

Relaminarization of accelerated turbulent boundary layer under favorable pressure gradient with sink flow type (Coherent structure and two-point statistics)

Nihon Kikai Gakkai ronbunshu, 2022
The relaminarization process of a turbulent boundary layer under a sink flow was investigated experimentally. The boundary layer was accelerated because of the contraction of the flow area. The mean and fluctuating velocity components were measured using
Masashi ICHIMIYA, Ikuo NAKAMURA, Masaki NAKATA   +2 more
doaj   +1 more source

Wind Energy and the Turbulent Nature of the Atmospheric Boundary Layer [PDF]

, 2012
Wind turbines operate in the atmospheric boundary layer, where they are exposed to the turbulent atmospheric flows. As the response time of wind turbine is typically in the range of seconds, they are affected by the small scale intermittent properties of
Allan Morales, Castaing B., Frisch U., Günther H., Hendrik Heißelmann, International Electrotechnical Commission (IEC), Joachim Peinke, Jonkman J., Kang H. S., Kleinhans D., Kleinhans D., Knebel P., Körber F., Malcolm D. J., Matthias Wächter, Michael Hölling, Milan P., Milan P., Muzy J.F.m.c., Nico Reinke, Nielsen M., Patrick Milan, Philip Rinn, Tanja Mücke, Wächter M., Øye S.   +25 more
core   +1 more source

Determination of Wall Friction Velocity of the Turbulent Boundary Layer by Two-Parameter Nonlinear Curve Fitting

Xibei Gongye Daxue Xuebao, 2020
Hot-wire anemometer is a fundamental tool for flow field measurement, and has been widely adopted in research of turbulent flow. A turbulent boundary layer was generated by a trip wire and a piece of sandpaper in the low-speed wind tunnel, and the time ...

doaj   +1 more source

Excitation of localized wave packet in swept-wing supersonic boundary layer

MATEC Web of Conferences, 2017
The evolution of the artificial wave packet in swept-wing supersonic boundary layer was experimentally studied at M = 2. The localized disturbances were generated by a pulse glow discharge. Measurements were provided by a hot-wire anemometer. The spatial
Yatskikh Aleksey, Rumenskikh Marina, Yermolaev Yury, Kosinov Aleksander, Semionov Nikolay   +4 more
doaj   +1 more source

Detailed airflow dynamics and temperature data of axisymmetric and anisothermal jets developing in a room

Data in Brief, 2020
HVAC systems are often used to reach thermal comfort in buildings. It is then necessary to understand the resulting indoor airflow and thermal conditions to optimize the systems.
Teddy Gresse, Lucie Merlier, Frédéric Kuznik   +2 more
doaj   +1 more source

Metallic hot wire anemometer [PDF]

, 1977
A hot wire anemometer is described which has a body formed of heat resistant metal such as an alloy high in nickel content which supports a probe wire disposed in a V groove in the body.
Lemos, F. R.
core   +1 more source