Research Papers: Design and Analysis

Benchmarking of Improved DPAC Transient Deflagration Analysis Code

[+] Author and Article Information
James E. Laurinat

Savannah River National Laboratory,
Savannah River Site,
Aiken, SC 29808
e-mail: james.laurinat@srnl.doe.gov

Steve J. Hensel

Fellow ASME
Savannah River Nuclear Solutions,
Savannah River Site,
Aiken, SC 29808
e-mail: steve.hensel@srnl.doe.gov

1Corresponding author.

Contributed by the Pressure Vessel and Piping Division of ASME for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received December 6, 2016; final manuscript received August 7, 2017; published online September 27, 2017. Assoc. Editor: Hardayal S. Mehta.The United States Government retains, and by accepting the article for publication, the publisher acknowledges that the United States Government retains, a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this work, or allow others to do so, for United States Government purposes.

J. Pressure Vessel Technol 139(6), 061205 (Sep 27, 2017) (7 pages) Paper No: PVT-16-1230; doi: 10.1115/1.4037635 History: Received December 06, 2016; Revised August 07, 2017

The deflagration pressure analysis code (DPAC) has been upgraded for use in modeling hydrogen deflagration transients. The upgraded code is benchmarked using data from vented hydrogen deflagration tests conducted at the HYDRO-SC Test Facility at the University of Pisa. DPAC originally was written to calculate peak pressures for deflagrations in radioactive waste storage tanks and process facilities at the Savannah River Site. Upgrades include the addition of a laminar flame speed correlation for hydrogen deflagrations and a mechanistic model for turbulent flame propagation, incorporation of inertial effects during venting, and inclusion of the effect of water vapor condensation on vessel walls. In addition, DPAC has been coupled with chemical equilibrium with applications (CEA), a NASA combustion chemistry code. The deflagration tests are modeled as end-to-end deflagrations. The improved DPAC code successfully predicts both the peak pressures during the deflagration tests and the times at which the pressure peaks.

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Grahic Jump Location
Fig. 1

Pressure transients for Carcassi and Fineschi deflagration tests

Grahic Jump Location
Fig. 2

Correlation of laminar burning velocities

Grahic Jump Location
Fig. 3

Modeling of pressure transient for Carcassi and Fineschi unvented test

Grahic Jump Location
Fig. 4

Modeling of pressure transient for Carcassi and Fineschi 0.03-m vent test

Grahic Jump Location
Fig. 5

Modeling of pressure transient for Carcassi and Fineschi 0.10-m vent test



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