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A simplified CFD model for spectral radiative heat transfer in high-pressure hydrocarbon–air combustion systems

Journal Article · · Proceedings of the Combustion Institute
 [1];  [2];  [3]
  1. Pennsylvania State Univ., University Park, PA (United States); DOE/OSTI
  2. Pennsylvania State Univ., University Park, PA (United States)
  3. Univ. of California, Merced, CA (United States)
Detailed radiation modeling in piston engines has received relatively little attention to date. Recently, it is being revisited in light of current trends towards higher operating pressures and higher levels of exhaust-gas recirculation (EGR), both of which enhance molecular gas radiation. Advanced high-efficiency engines also are expected to function closer to the limits of stable operation, where even small perturbations to the energy balance can have a large influence on system behavior. Detailed radiation modeling using sophisticated tools like photon Monte Carlo/line-by-line (PMC/LBL) is computationally expensive. Here, guided by results from PMC/LBL, a simplified stepwise-gray spectral model in combination with a first-order spherical harmonics (P1 method) radiative transfer equation (RTE) solver is proposed and tested for engine-relevant conditions. Radiative emission, reabsorption and radiation reaching the walls are computed for a heavy-duty compression-ignition engine at part-load and full-load operating conditions with different levels of EGR and soot. The results are compared with those from PMC/LBL, P1/FSK (P1 with a full-spectrum k-distribution spectral model) and P1/Gray radiation models to assess the proposed model’s accuracy and computational cost. The results show that the proposed P1/StepwiseGray model can calculate reabsorption locally and globally with less than 10% error (with respect to PMC/LBL) at a small fraction of the computational cost of PMC/LBL (a factor of 30) and P1/FSK (a factor of 15). In contrast, error in computed reabsorption by the P1/Gray model is as high as 60%. Finally, it is expected that the simplified model should be broadly applicable to high-pressure hydrocarbon–air combustion systems, with or without soot.
Research Organization:
Pennsylvania State Univ., University Park, PA (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE); National Science Foundation (NSF)
Grant/Contract Number:
EE0007278
OSTI ID:
1614029
Alternate ID(s):
OSTI ID: 1637093
Journal Information:
Proceedings of the Combustion Institute, Journal Name: Proceedings of the Combustion Institute Journal Issue: 4 Vol. 37; ISSN 1540-7489
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (15)

A simplified reaction mechanism for soot formation in nonpremixed flames journal December 1991
Numerical and experimental analysis of combined convective and radiative heat transfer in laminar flow over a circular cylinder journal November 1995
The stepwise gray P-1 approximation for multi-dimensional radiative transfer in molecular-gas—particulate mixtures journal August 1992
Internal-combustion engine heat transfer journal January 1987
A probability density function approach to modeling turbulence–radiation interactions in nonluminous flames journal March 1999
Measurement of in-cylinder soot particles and their distribution in an optical HSDI diesel engine using time resolved laser induced incandescence (TR-LII) journal September 2012
Comparison of accuracy and computational expense of radiation models in simulation of non-premixed turbulent jet flames journal June 2015
Soot and spectral radiation modeling for high-pressure turbulent spray flames journal April 2018
HITEMP, the high-temperature molecular spectroscopic database journal October 2010
Progress in probability density function methods for turbulent reacting flows journal April 2010
Turbulence–chemistry interactions in a heavy-duty compression–ignition engine journal January 2015
A Multidimensional Radiation Model for Diesel Engine Simulation with Comparison to Experiment journal November 2003
Determination of the Wavelength Dependence of Refractive Indices of Flame Soot journal September 1990
Radiation Heat Transfer in Nonisothermal Nongray Gases journal August 1967
Effect of Radiation on Diesel Engine Combustion and Heat Transfer journal January 2009

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