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  • 1
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    Furthur development of the dynamic gas temperature measurement system (1984)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: Candidate concepts capable of generating dynamic temperatures were identified and analyzed for use in verifying experimentally the frequency response of the dynamic gas temperature measurement system. A rotating wheel concept and one other concept will be selected for this purpose. Modifications to the data reduction code algorithms developed were identified and evaluated to reduce substantially the data reduction execution time. These modifications will be incorporated in a new data reduction program to be written in FORTRAN IV.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA. Lewis Research Center Turbine Engine Hot Section Technology, 1984; 10 p
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Further development of the dynamic gas temperature measurement system. Volume 1: Technical efforts (1986)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A compensated dynamic gas temperature thermocouple measurement method was experimentally verified. Dynamic gas temperature signals from a flow passing through a chopped-wheel signal generator and an atmospheric pressure laboratory burner were measured by the dynamic temperature sensor and other fast-response sensors. Compensated data from dynamic temperature sensor thermoelements were compared with fast-response sensors. Results from the two experiments are presented as time-dependent waveforms and spectral plots. Comparisons between compensated dynamic temperature sensor spectra and a commercially available optical fiber thermometer compensated spectra were made for the atmospheric burner experiment. Increases in precision of the measurement method require optimization of several factors, and directions for further work are identified.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-CR-179513-VOL-1 , NAS 1.26:179513-VOL-1 , P/W/GPD-FR-19381-VOL-1
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    NASA TECHNICAL REPORTS
  • 3
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    Further development of the dynamic gas temperature measurement system (1986)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: A compensated thermocouple measurement method was experimentally verified. Dynamic signal content from an atmospheric pressure laboratory burner was measured by the dynamic temperature sensor and a relatively delicate fine-wire resistance thermometer. Compensated data from the two dynamic temperature sensor thermoelements were compared with the compensated fine-wire data in the frequency domain. Absolute differences between spectral line amplitudes measured with different sensors are small relative to the mean temperature and verify the compenation method. Increases in precision of the measurement method require optimization of several factors, and directions for further work are identified.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: AIAA PAPER 86-1648
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Dynamic gas temperature measurement system (1983)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A gas temperature measurement system with compensated frequency response of 1 KHz and capability to operate in the exhaust of a gas turbine combustor was developed. Environmental guidelines for this measurement are presented, followed by a preliminary design of the selected measurement method. Transient thermal conduction effects were identified as important; a preliminary finite-element conduction model quantified the errors expected by neglecting conduction. A compensation method was developed to account for effects of conduction and convection. This method was verified in analog electrical simulations, and used to compensate dynamic temperature data from a laboratory combustor and a gas turbine engine. Detailed data compensations are presented. Analysis of error sources in the method were done to derive confidence levels for the compensated data.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA. Lewis Research Center Turbine Eng. Hot Sect. Technol. (HOST); p 17-35
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Dynamic gas temperature measurement system, volume 1 (1983)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A gas temperature measurement system with compensated frequency response of 1 kHz and capability to operate in the exhaust of a gas turbine engine combustor was developed. A review of available technologies which could attain this objective was done. The most promising method was identified as a two wire thermocouple, with a compensation method based on the responses of the two different diameter thermocouples to the fluctuating gas temperature field. In a detailed design of the probe, transient conduction effects were identified as significant. A compensation scheme was derived to include the effects of gas convection and wire conduction. The two wire thermocouple concept was tested in a laboratory burner exhaust to temperatures of about 3000 F and in a gas turbine engine to combustor exhaust temperatures of about 2400 F. Uncompensated and compensated waveforms and compensation spectra are presented.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-CR-168267-VOL-1 , NAS 1.26:168267-VOL-1 , PWA/GPD-FR-17145-VOL-1
    Format: application/pdf
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  • 6
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    Further development of the dynamic gas temperature measurement system (1985)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Two experiments for verifying the frequency response of a previously-developed dynamic gas temperature measurement system were performed. In both experiments, fine-wire resistance temperature sensors were used as standards. The compensated dynamic temperature sensor data will be compared with the standards to verify the compensation method. The experiments are described in detail.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA. Lewis Research Center, Turbine Engine Hot Section Technology, 1985; p 37-43
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    NASA TECHNICAL REPORTS
  • 7
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    Further development of the dynamic gas temperature measurement system (1986)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The objective of this effort was to experimentally verify a dynamic gas temperature measurement system in laboratory experiments. The dynamic gas temperature measurement system verification program is described. A brief description of the sensor geometry and construction is followed by a discussion of the probe heat transfer analysis and subsequent compensation method. The laboratory experiments are described and experimental results are discussed. Finally, directions for further investigation are given.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA, Lewis Research Center, Turbine Engine Hot Section Technology 1986; p 51-60
    Format: application/pdf
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