0

Full Content is available to subscribers

Subscribe/Learn More  >

Digitalization of High Accuracy Thermo-Anemometer for Heat Flux Measurement in Stratified Flow

[+] Author Affiliations
Shunichi Sanae, Katsuhisa Ohba

Numazu National College of Technology, Numazu, Shizuoka, Japan

Paper No. AJK2011-31022, pp. 115-118; 4 pages
doi:10.1115/AJK2011-31022
From:
  • ASME-JSME-KSME 2011 Joint Fluids Engineering Conference
  • ASME-JSME-KSME 2011 Joint Fluids Engineering Conference: Volume 2, Fora
  • Hamamatsu, Japan, July 24–29, 2011
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 978-0-7918-4441-0
  • Copyright © 2011 by JSME

abstract

In this study, the high-accuracy thermo-anemometer was developed to execute simultaneous measurement of temperature and velocity by employing Field Programmable Gate Array (FPGA) devices. A cold-wire temperature sensor has first-order lags due to thermal time constants, that means that a phase compensation is essential to measure temperature fluctuations with high frequency. The digital filter comprised the exact first-order lead characteristics was realized by the bilinear s-z transformation. It was verified that the temperature signals were appropriately compensated with an uncertainty of less than ±3.9% in frequency up to 10 kHz. For velocity measurements, a temperature compensation is indispensable owing to velocity and temperature dependence of response of a hot-wire anemometer in thermally stratified flow fields. The accuracy of the velocity measurements at high temperature was improved with the strict algorithm of the temperature compensation calculation incorporating the temperature dependence of the thermal properties of the air. The high-accuracy velocity measurement was realized within the accuracy of ±1.6% in the temperature range of 1.5 times as wide as that of the previous analog based system. The simultaneous measurement system for temperature and velocity was applicable to measure heat flux in thermally stratified flows.

Copyright © 2011 by JSME

Figures

Tables

Interactive Graphics

Video

Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In