Simulation of Supercritical CO2 Flow Through Circular and Annular OrificeSource: Journal of Nuclear Engineering and Radiation Science:;2015:;volume( 001 ):;issue: 002::page 21003Author:Yuan, Haomin
,
Edlebeck, John
,
Wolf, Mathew
,
Anderson, Mark
,
Corradini, Michael
,
Klein, Sanford
,
Nellis, Gregory
DOI: 10.1115/1.4029337Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Supercritical CO2 (sCO2) is a promising working fluid for future highefficiency power conversion cycles. In order to develop these cycles, it is necessary to understand supercritical and twophase CO2 flow. This paper presents a methodology for the computational fluid dynamic (CFD) simulation of sCO2 flowing through a restriction under a wide range of flow conditions. Under an accidental situation, such as a pipe break, the inventory of sCO2 leaks out through a small restriction. In this research, we use circular and annular orifices to mimic the behavior of restrictions. As the atmospheric pressure is much smaller than the operating pressure in the pipe, a twophase choked flow will happen. Such behavior is considered in the simulation. The homogeneous equilibrium model (HEM) is employed to model the twophase state. To correctly simulate the behavior of the power cycle under this accidental scenario, the inventory leakage rate should be calculated precisely. Therefore, at the current state, this study only focuses on the prediction of mass flow rate through orifices.
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contributor author | Yuan, Haomin | |
contributor author | Edlebeck, John | |
contributor author | Wolf, Mathew | |
contributor author | Anderson, Mark | |
contributor author | Corradini, Michael | |
contributor author | Klein, Sanford | |
contributor author | Nellis, Gregory | |
date accessioned | 2017-05-09T01:22:18Z | |
date available | 2017-05-09T01:22:18Z | |
date issued | 2015 | |
identifier issn | 2332-8983 | |
identifier other | NERS_1_2_021003.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/159289 | |
description abstract | Supercritical CO2 (sCO2) is a promising working fluid for future highefficiency power conversion cycles. In order to develop these cycles, it is necessary to understand supercritical and twophase CO2 flow. This paper presents a methodology for the computational fluid dynamic (CFD) simulation of sCO2 flowing through a restriction under a wide range of flow conditions. Under an accidental situation, such as a pipe break, the inventory of sCO2 leaks out through a small restriction. In this research, we use circular and annular orifices to mimic the behavior of restrictions. As the atmospheric pressure is much smaller than the operating pressure in the pipe, a twophase choked flow will happen. Such behavior is considered in the simulation. The homogeneous equilibrium model (HEM) is employed to model the twophase state. To correctly simulate the behavior of the power cycle under this accidental scenario, the inventory leakage rate should be calculated precisely. Therefore, at the current state, this study only focuses on the prediction of mass flow rate through orifices. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | Simulation of Supercritical CO2 Flow Through Circular and Annular Orifice | |
type | Journal Paper | |
journal volume | 1 | |
journal issue | 2 | |
journal title | Journal of Nuclear Engineering and Radiation Science | |
identifier doi | 10.1115/1.4029337 | |
journal fristpage | 21003 | |
journal lastpage | 21003 | |
tree | Journal of Nuclear Engineering and Radiation Science:;2015:;volume( 001 ):;issue: 002 | |
contenttype | Fulltext |