mirage

A novel thermal sensor concept for flow direction and flow velocity.

DSpace/Manakin Repository

 

Search DR-NTU


Advanced Search Subject Search

Browse

My Account

A novel thermal sensor concept for flow direction and flow velocity.

Show full item record

Title: A novel thermal sensor concept for flow direction and flow velocity.
Author: Nguyen, Nam-Trung.
Copyright year: 2005
Abstract: This paper presents a unified theory for different measurement concepts of a thermal flow sensor. Based on this theory, a new flow sensor concept is derived. The concept allows measuring both direction and velocity of a fluid flow with a heater and an array of temperature sensors. This paper first analyzes the two-dimensional (2-D) forced convection problem with a laminar flow. The two operation modes of a constant heating power and of a constant heater temperature are considered in the analytical model. A novel estimation algorithm was derived for the flow direction. Different methods for velocity measurement were presented: the hot-wire method, the calorimetric method, and the novel average-temperature method. The only geometric parameter of the sensor, the dimensionless position of the sensor array, is optimized based on the analytical results. Furthermore, the paper presents the experimental results of the sensor prototype. In order to verify the analytical model, an array of temperature sensors was used for recording the 2-D temperature profile around the heater. Temperature values are transferred to a computer by a multiplexer. A program running on a personal computer extracts the actual flow velocity and flow direction from the measured temperature data. This paper discusses different evaluation algorithms, which can be used for this sensor. A simple Gaussian estimator was derived for the direction measurement. This estimator provides the same accuracy as the analytical estimator. Velocity results of both the calorimetric concept and the novel average-temperature concept are also presented.
Subject: DRNTU::Engineering::Mechanical engineering.
Type: Journal Article
Series/ Journal Title: IEEE sensors journal
School: School of Mechanical and Aerospace Engineering
Rights: © 2005 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. The published version is available at: DOI: [http://dx.doi.org.ezlibproxy1.ntu.edu.sg/10.1109/JSEN.2005.858924].
Version: Accepted version

Files in this item

Files Size Format View
ThermalSensorPaper.pdf 1.274Mb PDF View/Open
   

DOI Query

- Get published version (via Digital Object Identifier)
   

This item appears in the following Collection(s)

Show full item record

Statistics

Total views

All Items Views
A novel thermal sensor concept for flow direction and flow velocity. 279

Total downloads

All Bitstreams Views
ThermalSensorPaper.pdf 121

Top country downloads

Country Code Views
United States of America 41
China 30
Taiwan 15
Singapore 9
France 5

Top city downloads

city Views
Beijing 19
Mountain View 19
Taipei 10
Singapore 8
Simi Valley 4

Downloads / month

  2014-02 2014-03 2014-04 total
ThermalSensorPaper.pdf 0 0 3 3