Torsional Balance for Simultaneous Evaluation of Thrust Force and Flow Velocity of Electrostatically Induced Ionic Wind

Jun Rong Lee, Jiang Kai Lam, Ee Von Lau, Seong Chun Koay, Kean How Cheah

Research output: Journal PublicationArticlepeer-review

2 Citations (Scopus)

Abstract

This paper describes the development of a precise thrust measuring balance based on torsional pendulum principle for simultaneous evaluation of thrust force and flow velocity of electrostatically induced ionic wind. The balance has achieved a resolution as low as 1.38~\mu \text{N} and zero drift of 0.15 nN/s through proper isolation of external noises. Calibration has been carried out by using an improved version of electrostatic calibrator which produces a wide range of accurate and repeatable calibration force. After the calibration, the balance can resolve constant force from 41.03 to 627.84~\mu \text{N}. The maximum uncertainty error is 12.90% for measurement of constant force. The application of the balance has been demonstrated in measuring the smallest thrust force of 62.2~\mu \text{N} produced by the ionic wind. Using jet impingement theory, the lowest flow velocity of the ionic wind is evaluated as 27 m/s.

Original languageEnglish
Article number8601350
Pages (from-to)4518-4525
Number of pages8
JournalIEEE Transactions on Instrumentation and Measurement
Volume68
Issue number11
DOIs
Publication statusPublished - Nov 2019
Externally publishedYes

Keywords

  • Electrostatic (ES)
  • flow velocity
  • ionic wind
  • micronewton
  • torsional pendulum

ASJC Scopus subject areas

  • Instrumentation
  • Electrical and Electronic Engineering

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