Design optimization for fast heat-transfer gauges

Hogendoorn, C.J.; Lange, H. C. de; Steenhoven, A.A. van

doi:10.1088/0957-0233/9/3/017

Cited by 9 publications

(3 citation statements)

References 5 publications

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“…TFCs have been widely used in research on the transient behaviour of radiative heat transfer from a plasma and the yield of soft x-rays from high power Z-pinch plasmas [33][34][35]. The principle of operation of TFCs is that the electrical resist ance of a metal film is temperature dependent.…”

Section: Radiative Heat Flux Measurement Methodsmentioning

confidence: 99%

Effects of wire materials on radiative heat flux and spectral characteristics of a capillary discharge plasma jet

Yang¹,

Fan²,

Chen³

et al. 2019

J. Phys. D: Appl. Phys.

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Capillary discharge plasmas have been widely used in many fields. This paper investigates the influence of different explosion wire materials on the radiative heat flux and spectral characteristics. Three kinds of wire (aluminum, copper and nickel) with 0.3 mm diameter were used as initiation wires to produce an electrothermal plasma, with a capacitor charging voltage of 3 kV. A thin-film calorimeter with high response speed was used for the measurement of the radiative heat flux. At the same time, spectral analysis was performed using a spatially resolved spectrometer with an ICCD. Based on the results, the electrical energy transported to the plasma that is calculated from the voltage and current traces follows the order Cu > Al > Ni, while the radiative heat flux follows the order Al > Cu > Ni. The trends can be explained by the secondary combustion (chemical reaction with the air) of Al and the fact that the dissipated energy is smaller than the vaporization energy for Ni but larger for Al and Cu, resulting in a bad performance in jet heat flux due to the incomplete vaporization of Ni wires. For the Cu and Al cases, a four-stage evolution process of the emitted radiation, which describes the emission, absorption and decay processes, can be found from the spectral analysis.

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Section: Radiative Heat Flux Measurement Methodsmentioning

confidence: 99%

Effects of wire materials on radiative heat flux and spectral characteristics of a capillary discharge plasma jet

Yang¹,

Fan²,

Chen³

et al. 2019

J. Phys. D: Appl. Phys.

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“…A heat measuring method based on temperature transients is adopted by thin film resistance temperature devices (RTD), coaxial thermocouples, and calorimeters [17,18]. In order to measure the heat flux as a function of time, it is necessary to manage the temperature history by the methods discussed in [19].…”

Section: Introductionmentioning

confidence: 99%

Application of a Heat Flux Sensor in Wind Power Electronics

et al. 2016

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This paper proposes and investigates the application of the gradient heat flux sensor (GHFS) for measuring the local heat flux in power electronics. Thanks to its thinness, the sensor can be placed between the semiconductor module and the heat sink. The GHFS has high sensitivity and yields direct measurements without an interruption to the normal power device operation, which makes it attractive for power electronics applications. The development of systems for monitoring thermal loading and methods for online detection of degradation and failure of power electronic devices is a topical and crucial task. However, online condition monitoring (CM) methods, which include heat flux sensors, have received little research attention so far. In the current research, an insulated-gate bipolar transistor (IGBT) module-based test setup with the GHFS implemented on the base plate of one of the IGBTs is introduced. The heat flux experiments and the IGBT power losses obtained by simulations show similar results. The findings give clear evidence that the GHFS can provide an attractive condition monitoring method for the thermal loading of power devices.

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“…Typical examples of wall temperature sensors are reported in [ 1 – 5 ], heat flux sensors in [ 6 – 9 ], wall shear stress sensors in [ 10 – 17 ], transition detection in [ 18 – 20 ], and flow velocity measurements in [ 21 – 26 ]. Instead of compiling a large number of studies we try to characterize typical features of this kind of sensors and then set up a scheme by which these sensors can be classified.…”

Section: Introductionmentioning

confidence: 99%

Heat Transfer Measurements with Surface Mounted Foil-Sensors in an Active Mode: A Comprehensive Review and a New Design

Mocikat

Herwig

2009

Sensors

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A comprehensive review of film-sensors shows that they are primarily operated in a passive mode, i.e. without being actively heated to an extent, whereby they create a heat transfer situation on their own. Only when these sensors are used for wall shear stress measurements, the detection of laminar/turbulent transition, or the measurement of certain flow velocities, they are operated in an active mode, i.e. heated by an electrical current (after an appropriate calibration). In our study we demonstrate how these R(T)-based sensors (temperature dependence of the electrical resistance R) can also be applied in an active mode for heat transfer measurements. These measurements can be made on cold, unheated bodies, provided certain requirements with respect to the flow field are fulfilled. Our new sensors are laminated nickel- and polyimide-foils manufactured with a special technology, which is also described in detail.

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Design optimization for fast heat-transfer gauges

Cited by 9 publications

References 5 publications

Effects of wire materials on radiative heat flux and spectral characteristics of a capillary discharge plasma jet

Effects of wire materials on radiative heat flux and spectral characteristics of a capillary discharge plasma jet

Application of a Heat Flux Sensor in Wind Power Electronics

Heat Transfer Measurements with Surface Mounted Foil-Sensors in an Active Mode: A Comprehensive Review and a New Design

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