Heat Transfer Measurement Techniques Used or in Development at ONERA/Chalais-Meudon

Consigny, H.; Sant, Yves Le; Bouvier, F.; Baumann, P.; Mérienne, Marie-Claire

doi:10.1007/978-94-011-1828-6_39

Cited by 3 publications

(2 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To measure the rate of incident heat flux, various types of heat-flux gauges, which measure the magnitude of the incident heat-flux, have been developed. Conventional heat-flux gauges can be categorized as (i) gauges based on temperaturedifference measurement that include Gardon-type gauges [1], Schmidt-Boelter gauges [2], standard layered gauges [3], miniature plug-type heat-flux gauges [4]; (ii) gauges based on the dissipation of electrical power from a heater mounted on the substrate surface [5]; and (iii) gauges based on transient surface-temperature measurement using various techniques such as those involving co-axial thermocouples [6] and thin-film resistance elements [7].…”

Section: Introductionmentioning

confidence: 99%

An experimental study of a radially arranged thin-film heat-flux gauge

Cho

Fralick

Bhatt

1997

Meas. Sci. Technol.

View full text Add to dashboard Cite

A new thin-film heat-flux gauge was designed and fabricated on three different substrate materials. Forty pairs of Pt-Pt/10% Rh thermocouple junctions were deposited in a circular pattern on the same plane of the substrate. Over the thermocouples, 5 and 10 µm thick thermal resistance layers were deposited to create a temperature gradient across those layers. Calibration and testing of these gauges were carried out in an arc-lamp calibration facility. The heat flux calculated from the gauge output is in good agreement with the value obtained from the pre-calibrated standard sensor. A CO 2 laser was also used to test the steady-state and dynamic responses of the heat-flux gauge. During the steady-state test, the time constant for the heating period was 30 s. The frequency response of the heat-flux gauge was measured in the frequency domain using a CO 2 laser and a chopper. The responses from an infrared detector and the heat-flux gauge were measured simultaneously and compared. It was found that the thin-film heat-flux gauge has a dynamic frequency response of 3 kHz.

show abstract

Section: Introductionmentioning

confidence: 99%

An experimental study of a radially arranged thin-film heat-flux gauge

Cho

Fralick

Bhatt

1997

Meas. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…To measure the rate of incident heat ux, various types of heat ux gauges have been developed. Conventional heat ux gauges can be categorized as 1) gauges based on the temperature difference measurement, which include the Gardon-type gauge, 2 the Schmidt-Boelter gauge, 3 and standard layered gauges 4 ; 2) gauges based on transient surface temperature measurement using various techniques such as coaxial thermocouples 5 and thin-lm resistance elements 6 ; and 3) gauges based on the dissipation of electrical power from a heater mounted on the substrate surface. 7 One of the major drawbacks of the conventionalheat ux gauge is a distortion of thermal-and owelds created due to the sensor's very presence.…”

mentioning

confidence: 99%

Steady-State and Frequency Response of a Thin-Film Heat Flux Gauge

Cho

Fralick

Bhatt

1997

Journal of Spacecraft and Rockets

View full text Add to dashboard Cite

A new and simpler design of thin-lm heat ux gauge has been developed for use in high-heat-ux environments. Heat ux gauges of the same design were fabricated on three different substrates and tested. The heat ux gauge comprises a thermopile and a thermocouple junction, which measures the surface temperature. The thermopile has 40 pairs of S-type thermocouples and is covered by two thermal resistance layers. Calibration and testing of these gauges were rst carried out in an arc-lamp calibration facility. Sensitivity of the gauge was discussed in terms of the relative conductivity and surface temperature. The heat ux calculated from the gauge output was in good agreement with the precalibrated standard sensor. The steady-state and the transient response characteristics of the heat ux gauge were also investigated using a carbon dioxide pulse laser as a heat source. The dynamic frequency response was evaluated in terms of the nondimensional amplitude ratio with respect to the frequency spectrum of a chopped laser beam. The frequency response of the gauge was determined to be about 3 kHz. The temperature pro les in the thin-lm heat ux gauge were obtained numerically in steady-state conditions using FLUENT and compared with the experimental results.

show abstract

Phosphor Thermography Technique in Hypersonic Wind Tunnels: First Results

Sant

Edy²

International Congress on Instrumentation in Aerospace Simulation Facilities,

View full text Add to dashboard Cite

Heat Transfer Measurement Techniques Used or in Development at ONERA/Chalais-Meudon

Cited by 3 publications

References 2 publications

An experimental study of a radially arranged thin-film heat-flux gauge

An experimental study of a radially arranged thin-film heat-flux gauge

Steady-State and Frequency Response of a Thin-Film Heat Flux Gauge

Phosphor Thermography Technique in Hypersonic Wind Tunnels: First Results

Contact Info

Product

Resources

About