Transient thermal modelling and validation in high-voltage x-ray sources

Nancy Ma; Steven A. Morris; Eric J. Miller; Kris J. Kozaczek; Vincent F. Jones

doi:10.1016/j.tsep.2019.100364

Transient thermal modelling and validation in high-voltage x-ray sources

Nancy Ma, Steven A. Morris, Eric J. Miller, Kris J. Kozaczek, Vincent F. Jones

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

During the operation of a high-voltage x-ray source, relatively large amounts of electrical energy must be transferred to the x-ray tube. The efficiency of generation of a useful flux of photons is in the order of 10⁻⁴, and most of the input energy is dissipated as thermal energy or waste heat in the tube. The thermal management of this waste heat is a key aspect of designing an optimal x-ray source. This investigation presents the transient temperature distribution obtained by test measurements coupled with transient numerical modelling of the x-ray source. The numerical model is calibrated to match transient three-dimensional experimental temperature measurements by varying the boundary conditions and thermophysical properties of materials. The boundary conditions and material properties are assumed to be spatially uniform and constant with respect to time.

Original language	English
Article number	100364
Journal	Thermal Science and Engineering Progress
Volume	13
DOIs	https://doi.org/10.1016/j.tsep.2019.100364
State	Published - Oct 2019
Externally published	Yes

Keywords

Experimental model validation
Heat transfer
Numerical modelling
Test measurements
Thermal management
X-ray

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10.1016/j.tsep.2019.100364

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title = "Transient thermal modelling and validation in high-voltage x-ray sources",

abstract = "During the operation of a high-voltage x-ray source, relatively large amounts of electrical energy must be transferred to the x-ray tube. The efficiency of generation of a useful flux of photons is in the order of 10−4, and most of the input energy is dissipated as thermal energy or waste heat in the tube. The thermal management of this waste heat is a key aspect of designing an optimal x-ray source. This investigation presents the transient temperature distribution obtained by test measurements coupled with transient numerical modelling of the x-ray source. The numerical model is calibrated to match transient three-dimensional experimental temperature measurements by varying the boundary conditions and thermophysical properties of materials. The boundary conditions and material properties are assumed to be spatially uniform and constant with respect to time.",

keywords = "Experimental model validation, Heat transfer, Numerical modelling, Test measurements, Thermal management, X-ray",

author = "Nancy Ma and Morris, {Steven A.} and Miller, {Eric J.} and Kozaczek, {Kris J.} and Jones, {Vincent F.}",

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journal = "Thermal Science and Engineering Progress",

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T1 - Transient thermal modelling and validation in high-voltage x-ray sources

AU - Ma, Nancy

AU - Morris, Steven A.

AU - Miller, Eric J.

AU - Kozaczek, Kris J.

AU - Jones, Vincent F.

PY - 2019/10

Y1 - 2019/10

N2 - During the operation of a high-voltage x-ray source, relatively large amounts of electrical energy must be transferred to the x-ray tube. The efficiency of generation of a useful flux of photons is in the order of 10−4, and most of the input energy is dissipated as thermal energy or waste heat in the tube. The thermal management of this waste heat is a key aspect of designing an optimal x-ray source. This investigation presents the transient temperature distribution obtained by test measurements coupled with transient numerical modelling of the x-ray source. The numerical model is calibrated to match transient three-dimensional experimental temperature measurements by varying the boundary conditions and thermophysical properties of materials. The boundary conditions and material properties are assumed to be spatially uniform and constant with respect to time.

AB - During the operation of a high-voltage x-ray source, relatively large amounts of electrical energy must be transferred to the x-ray tube. The efficiency of generation of a useful flux of photons is in the order of 10−4, and most of the input energy is dissipated as thermal energy or waste heat in the tube. The thermal management of this waste heat is a key aspect of designing an optimal x-ray source. This investigation presents the transient temperature distribution obtained by test measurements coupled with transient numerical modelling of the x-ray source. The numerical model is calibrated to match transient three-dimensional experimental temperature measurements by varying the boundary conditions and thermophysical properties of materials. The boundary conditions and material properties are assumed to be spatially uniform and constant with respect to time.

KW - Experimental model validation

KW - Heat transfer

KW - Numerical modelling

KW - Test measurements

KW - Thermal management

KW - X-ray

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DO - 10.1016/j.tsep.2019.100364

M3 - Article

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VL - 13

JO - Thermal Science and Engineering Progress

JF - Thermal Science and Engineering Progress

M1 - 100364

ER -

Transient thermal modelling and validation in high-voltage x-ray sources

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Keywords

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