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Title: Nondestructive quality assurance of ceramic filters using noncontact dynamic characterization

Abstract

Ceramic candle filters are stiff cylindrical structures arranged in rosettes in a hot gas vessel. Custom-made with strong composite materials, these filters are designed to withstand heating and cooling cycles of very high temperature gradients during coal energy production processes. To ensure consistency in the manufactured filters, noncontact dynamic characterization using laser vibrometry is proposed as a factory quality control technique. To evaluate the proposed technique, a sensitivity study using both contact and noncontact vibration measurements is first conducted. The shift in natural vibration frequencies is used as a quality indicator for likely manufacturing variables. Six candle filters are tested using dynamic impact tests. Contact and noncontact results are compared with theoretical natural frequency values, which show that laser results were 'noisier' due to dropout from speckle noises. The results are used to establish the sensitivity of the technique, which indicates that dynamic characterization is a valid nondestructive testing technique for quality assurance of the ceramic filters, provided that the manufactured filters have a quality variation greater than 3.21%.

Authors:
; ;  [1]
  1. University of Alabama, Birmingham, AL (United States). Dept. of Civil & Environmental Engineering
Publication Date:
OSTI Identifier:
20681328
Resource Type:
Journal Article
Journal Name:
Journal of Nondestructive Evaluation
Additional Journal Information:
Journal Volume: 24; Journal Issue: 2; Journal ID: ISSN 0195-9298
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; CERAMICS; FILTERS; HOT GAS CLEANUP; QUALITY CONTROL; NONDESTRUCTIVE TESTING; IMPACT TESTS; LASERS; FOSSIL-FUEL POWER PLANTS; COMBINED-CYCLE POWER PLANTS

Citation Formats

Yue, P, Chen, S E, and Nishihama, Y. Nondestructive quality assurance of ceramic filters using noncontact dynamic characterization. United States: N. p., 2005. Web. doi:10.1007/s10921-005-3482-0.
Yue, P, Chen, S E, & Nishihama, Y. Nondestructive quality assurance of ceramic filters using noncontact dynamic characterization. United States. https://doi.org/10.1007/s10921-005-3482-0
Yue, P, Chen, S E, and Nishihama, Y. 2005. "Nondestructive quality assurance of ceramic filters using noncontact dynamic characterization". United States. https://doi.org/10.1007/s10921-005-3482-0.
@article{osti_20681328,
title = {Nondestructive quality assurance of ceramic filters using noncontact dynamic characterization},
author = {Yue, P and Chen, S E and Nishihama, Y},
abstractNote = {Ceramic candle filters are stiff cylindrical structures arranged in rosettes in a hot gas vessel. Custom-made with strong composite materials, these filters are designed to withstand heating and cooling cycles of very high temperature gradients during coal energy production processes. To ensure consistency in the manufactured filters, noncontact dynamic characterization using laser vibrometry is proposed as a factory quality control technique. To evaluate the proposed technique, a sensitivity study using both contact and noncontact vibration measurements is first conducted. The shift in natural vibration frequencies is used as a quality indicator for likely manufacturing variables. Six candle filters are tested using dynamic impact tests. Contact and noncontact results are compared with theoretical natural frequency values, which show that laser results were 'noisier' due to dropout from speckle noises. The results are used to establish the sensitivity of the technique, which indicates that dynamic characterization is a valid nondestructive testing technique for quality assurance of the ceramic filters, provided that the manufactured filters have a quality variation greater than 3.21%.},
doi = {10.1007/s10921-005-3482-0},
url = {https://www.osti.gov/biblio/20681328}, journal = {Journal of Nondestructive Evaluation},
issn = {0195-9298},
number = 2,
volume = 24,
place = {United States},
year = {Wed Jun 01 00:00:00 EDT 2005},
month = {Wed Jun 01 00:00:00 EDT 2005}
}