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Title: Method of measuring reactive acoustic power density in a fluid

Abstract

A method for determining reactive acoustic power density level and its direction in a fluid using a single sensor is disclosed. In the preferred embodiment, an apparatus for conducting the method, which is termed a thermoacoustic couple, consists of a stack of thin, spaced apart polymeric plates, selected ones of which include multiple bimetallic thermocouple junctions positioned along opposite end edges thereof. The thermocouple junctions are connected in series in the nature of a thermopile, and are arranged so as to be responsive to small temperature differences between the opposite edges of the plates. The magnitude of the temperature difference, as represented by the magnitude of the electrical potential difference generated by the thermopile, is found to be directly related to the level of acoustic power density in the gas.

Inventors:
 [1];  [1];  [2]
  1. (Los Alamos, NM)
  2. (Santa Fe, NM)
Issue Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM
OSTI Identifier:
865576
Patent Number(s):
4538464
Assignee:
United States of America as represented by United States (Washington, DC) LANL
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; measuring; reactive; acoustic; power; density; fluid; determining; level; direction; single; sensor; disclosed; preferred; embodiment; apparatus; conducting; termed; thermoacoustic; couple; consists; stack; spaced; apart; polymeric; plates; selected; ones; multiple; bimetallic; thermocouple; junctions; positioned; opposite; edges; connected; series; nature; thermopile; arranged; responsive; temperature; differences; magnitude; difference; represented; electrical; potential; generated; found; directly; related; gas; directly related; acoustic power; temperature difference; potential difference; electrical potential; preferred embodiment; spaced apart; power density; temperature differences; opposite edges; thermocouple junctions; selected ones; single sensor; opposite edge; difference generated; reactive acoustic; density level; thermocouple junction; active acoustic; /73/136/374/

Citation Formats

Wheatley, John C., Swift, Gregory W., and Migliori, Albert. Method of measuring reactive acoustic power density in a fluid. United States: N. p., 1985. Web.
Wheatley, John C., Swift, Gregory W., & Migliori, Albert. Method of measuring reactive acoustic power density in a fluid. United States.
Wheatley, John C., Swift, Gregory W., and Migliori, Albert. Tue . "Method of measuring reactive acoustic power density in a fluid". United States. https://www.osti.gov/servlets/purl/865576.
@article{osti_865576,
title = {Method of measuring reactive acoustic power density in a fluid},
author = {Wheatley, John C. and Swift, Gregory W. and Migliori, Albert},
abstractNote = {A method for determining reactive acoustic power density level and its direction in a fluid using a single sensor is disclosed. In the preferred embodiment, an apparatus for conducting the method, which is termed a thermoacoustic couple, consists of a stack of thin, spaced apart polymeric plates, selected ones of which include multiple bimetallic thermocouple junctions positioned along opposite end edges thereof. The thermocouple junctions are connected in series in the nature of a thermopile, and are arranged so as to be responsive to small temperature differences between the opposite edges of the plates. The magnitude of the temperature difference, as represented by the magnitude of the electrical potential difference generated by the thermopile, is found to be directly related to the level of acoustic power density in the gas.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1985},
month = {1}
}

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