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Title: Visualization of the Mode Shapes of Pressure Oscillation in a Cylindrical Cavity

Our work describes a novel experimental method to visualize the mode shapes of pressure oscillation in a cylindrical cavity. Acoustic resonance in a cavity is a grand old problem that has been under investigation (using both analytical and numerical methods) for more than a century. In this article, a novel method based on high speed imaging of combustion chemiluminescence was presented to visualize the mode shapes of pressure oscillation in a cylindrical cavity. By generating high-temperature combustion gases and strong pressure waves simultaneously in a cylindrical cavity, the pressure oscillation can be inferred due to the chemiluminescence emissions of the combustion products. We can then visualized the mode shapes by reconstructing the images based on the amplitudes of the luminosity spectrum at the corresponding resonant frequencies. Up to 11 resonant mode shapes were clearly visualized, each matching very well with the analytical solutions.
 [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [2]
  1. Tsinghua Univ., Beijing (China)
  2. National Renewable Energy Lab. (NREL), Golden, CO (United States)
Publication Date:
OSTI Identifier:
Report Number(s):
Journal ID: ISSN 0010-2202
DOE Contract Number:
Resource Type:
Journal Article
Resource Relation:
Journal Name: Combustion Science and Technology; Journal Volume: 187; Journal Issue: 10; Related Information: Combustion Science and Technology
Research Org:
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Bioenergy Technologies Office (EE-3B)
Country of Publication:
United States
59 BASIC BIOLOGICAL SCIENCES Resonant frequency; Mode shape; Cylindrical cavity