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Research Papers: Combustion and Reactive Flows

Three-Dimensional Inverse Heat Transfer in a Composite Target Subject to High-Energy Laser Irradiation

[+] Author and Article Information
Jianhua Zhou, J. K. Chen, Z. C. Feng

Department of Mechanical and Aerospace Engineering,  University of Missouri, Columbia, MO 65211

Yuwen Zhang1

Department of Mechanical and Aerospace Engineering,  University of Missouri, Columbia, MO 65211zhangyu@missouri.edu

1

Corresponding author.

J. Heat Transfer 134(11), 111201 (Sep 24, 2012) (10 pages) doi:10.1115/1.4006107 History: Received March 30, 2011; Revised January 02, 2012; Published September 24, 2012; Online September 24, 2012

A new numerical model is developed to simulate the 3D inverse heat transfer in a composite target with pyrolysis and outgassing effects. The gas flow channel size and gas addition velocity are determined by the rate equation of decomposition chemical reaction. The thermophysical properties of the composite considered are temperature-dependent. A nonlinear conjugate gradient method (CGM) is applied to solve the inverse heat conduction problem for high-energy laser-irradiated composite targets. It is shown that the front-surface temperature can be recovered with satisfactory accuracy based on the temperature/heat flux measurements on the back surface and the temperature measurement at an interior plane.

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Copyright © 2012 by American Society of Mechanical Engineers
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Figures

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Figure 2

Physical model of 1D gas flow channels

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Figure 4

Temperature at the laser spot center on the front surface for q0″=150 W/cm2

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Figure 5

Temporal evolvement of the gas channel shape (labels are time in seconds)

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Figure 6

Distribution of the convective heat transfer coefficient along the x-direction (labels are time in seconds)

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Figure 7

Recovered temperatures on the front surface

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Figure 8

2D contours of the temperatures at the front surface at the time of 4 s

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Figure 9

Contour distributions of the recovered temperatures errors (K) on the front surface at different times

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Figure 10

Results for q0″=300 W/cm2

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Figure 11

Recovered front surface temperature for f = 5 Hz

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