A Durable, Intermediate Temperature, Direct Reading Heat Flux Transducer for Measurements in Continuous Wind Tunnels

Kidd, C. T.

doi:10.21236/ada107729

Cited by 27 publications

(4 citation statements)

References 6 publications

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“…When it came to gradient heat flux measure sensors, two typical heat flux measuring sensors are the Gardon-type gauge composed of a foil and a heat sink 18 and the Schmidt-Boelter gauge made of a thermopile. 19 Wang et al 20 and Li et al 21 designed and calibrated a kind of Gardon-type gauge. Their experimental results indicated that the output temperature difference and the output thermoelectric voltage produced by the sensor were almost in direct proportion to the exterior radiation.…”

Section: Introductionmentioning

confidence: 99%

Study of amplification coefficient in a water-cooling Gardon-type heat power measuring apparatus

Zhang

et al. 2015

Chinese Journal of Aeronautics

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A new water-cooling Gardon-type heat power measuring apparatus is designed to meet the need of heat power source management and distribution. The steady state measurement mathematic model of the apparatus is built up in theory and the system amplification coefficient is defined as the ratio of the heat power to the temperature difference of the device, with which the value of the measured source power can be calculated easily with the corresponding temperature difference. In order to obtain an optimal heat power measuring system, the coefficients that can influence the relationship between the amplification coefficient, the temperature difference, and the heat power are analyzed. On the basis of these analyses, a set of experimental device is constructed and a number of experiments are carried on. Compared with the input heat power sample data, the error of the experimental measuring results is less than ±2%, and the experimental measuring values are in good agreement with the calculated theoretical ones. The heat power measuring apparatus can be applied in heat flux or heat power measurement in other fields due to its simple structure and high accuracy.

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Section: Introductionmentioning

confidence: 99%

Study of amplification coefficient in a water-cooling Gardon-type heat power measuring apparatus

Zhang

et al. 2015

Chinese Journal of Aeronautics

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“…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.

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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.

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“…Schmidt-Boelter-type heat flux sensor[87] was chosen for this application because it was commercially available, had good sensitivity to radiative heat fluxes of the expected magnitudes in a relatively small size, produced an output voltage that is directly proportional to the incident flux, and, provided it was in good thermal contact with a sufficient heat sink, was capable of delivering continuous measurements for an indefinite time. The front (sensing) surface of the sensor was coated with black paint with a reported absorptance of 0.94 to maximize the sensor's absorption of thermal radiation.…”

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confidence: 99%

Assessment of the Performance of Ablative Insulators Under Realistic Solid Rocket Motor Operating Conditions

Martin

2017

Int J Energetic Materials Chem Prop

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A Durable, Intermediate Temperature, Direct Reading Heat Flux Transducer for Measurements in Continuous Wind Tunnels

Cited by 27 publications

References 6 publications

Study of amplification coefficient in a water-cooling Gardon-type heat power measuring apparatus

Study of amplification coefficient in a water-cooling Gardon-type heat power measuring apparatus

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

Assessment of the Performance of Ablative Insulators Under Realistic Solid Rocket Motor Operating Conditions

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