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Benchmark Database for Input and Validation of Spray Combustion Models

Published

Author(s)

J F. Widmann, S R. Charagundla, Cary Presser

Abstract

Control of process efficiency and the formation of species byproducts from industrial thermal oxidation systems (e.g., power generation and treatment of liquid chemical wastes), is generally based on a priori knowledge of the input stream physical and chemical properties, desired stoichiometric conditions, and monitoring of a few major chemical species in the exhaust. Optimization of the performance of these systems is relying increasingly on computational models and simulations that help provide relevant process information in a cost-effective manner. Although computational fluid dynamics (CFD) offers a cost-effective alternative to experiments, the accuracy of the CFD model must first be assured. This should be accomplished in two ways: verification and validation (Oberkampf et al., 1997). Verification involves ensuring that the algebraic and differential equations within the model have been accurately solved. In addition to verifying that the numerical code arrives at the correct solution, it is also necessary to determine if the correct model has been solved. This is the validation step. The objective of this paper is to provide benchmark experimental data for CFD model and submodel validation. This paper presents data obtained from a baseline spray flame within the reference spray combustion facility at NIST. The spray data presented were collected non-intrusively using phase Doppler interferometry (PDI). Data are presented for the size and velocity distributions of the fuel droplets, droplet number density, and volume flux of fuel droplets within the spray. The enclosed combustion chamber provides well-characterized boundary conditions, and wall temperature data are provided as a function of axial position. Gas temperature and species measurements that were obtained at the reactor exit can be used for boundary conditions or validation of computational results. Gas-phase velocity, temperature, and heat flux measurements are planned for the next stage of this investigation.
Proceedings Title
12th Annual International Conference on Liquid Atomization and Spray Systems
Conference Dates
May 16-19, 1999
Conference Location
Undefined
Conference Title
International Conference on Liquid Atomization and Spray Systems

Keywords

CFD model validation, FTIR spectroscopy, multiphase combustion, phase Doppler interferometry, spray combustion

Citation

Widmann, J. , Charagundla, S. and Presser, C. (1999), Benchmark Database for Input and Validation of Spray Combustion Models, 12th Annual International Conference on Liquid Atomization and Spray Systems, Undefined (Accessed April 16, 2024)
Created April 30, 1999, Updated October 12, 2021