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TECHNICAL BRIEFS

Numerical Prediction of Fluid Flow and Heat Transfer in the Target System of an Axisymmetric Accelerator-Driven Subcritical System

[+] Author and Article Information
K. Arul Prakash

Department of Mechanical Engineering, Indian Institute of Technology Kanpur, Kanpur-208 016, India

G. Biswas1

Department of Mechanical Engineering, Indian Institute of Technology Kanpur, Kanpur-208 016, Indiagtm@iitk.ac.in

B. V. Kumar

Department of Mathematics, Indian Institute of Technology Kanpur, Kanpur-208 016, India

1

Corresponding author.

J. Heat Transfer 129(4), 582-588 (Nov 15, 2006) (7 pages) doi:10.1115/1.2709972 History: Received April 15, 2006; Revised November 15, 2006

Thermal hydraulics related to the design of the spallation target module of an accelerator-driven subcritical system (ADSS) was investigated numerically using a streamline upwind Petrov-Galerkin (SUPG) finite element (FE) method. A large amount of heat is deposited on the window and in the target during the course of nuclear reaction between the proton beam and the molten lead-bismuth eutectic (LBE) target. Simulations were carried out to predict the characteristics of the flow and temperature fields in the target module with a funnel-shaped flow guide and spherical bottom of the container. The beam window was kept under various thermal conditions. The analysis was extended to the case of heat generation in the LBE. The principal purpose of the analysis was to trace the temperature distribution on the beam window and in the LBE. In the case of turbulent flows, the number of recirculation regions is decreased and the maximum heat transfer was found to take place downstream of the stagnation zone on the window.

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Copyright © 2007 by American Society of Mechanical Engineers
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Figures

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Figure 1

Physical domain of the target system of an ADSS with boundary conditions

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Figure 2

(a) Fully developed pipe flow results (kinetic energy) for Re=500,000 and (b) fully developed pipe flow results (dissipation rate) for Re=500,000

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Figure 3

Streamlines for (a) Re=500, (b) Re=700, and (c) Re=1000

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Figure 4

Pressure contours for (a) Re=500, (b) Re=700, and (c) Re=1000

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Figure 5

Temperature contours for constant temperature along the beam window (enlarged view of beam window:) (a) Re=500, (b) Re=700, and (c) Re=1000

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Figure 6

Nusselt number for constant temperature along the beam window: (a) Re=500, (b) Re=700, and (c) Re=1000

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Figure 7

Cf×Re along the beam window: (a) Re=500, (b) Re=700, and (c) Re=1000

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Figure 8

Temperature contours for heat generation in LBE and constant window surface temperature along the beam window: (a) Re=500, (b) Re=700, and (c) Re=1000

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Figure 9

Streamlines for (a) Re=141,340, (b) Re=282,690, and (c) Re=565,380

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Figure 10

(a) Temperature contours for constant temperature along the beam window (enlarged view of beam window) for Re=565,380, and (b) enlarged view of the rectangular portion shown in (a)

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Figure 11

Nusselt number for constant window temperature along the beam window for (a) Re=141,340, (b) Re=282,690, and (c) Re=565,380

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