Numerical Simulation for the Combustion Chamber of a Reference Calorimeter

Abstract

This paper focuses on the numerical modeling of the effect of the height of a combustion chamber on the development of a reference calorimeter whose objective is to measure the calorific value of natural gas. The impacts of temperature, velocity, and mass fraction on the exhaust gases were evaluated by varying the height of the combustion chamber. The eddy dissipation concept (EDC) approach was used to model combustion with two different chemical kinetic mechanisms: one with three steps, called the three-step mechanism defined by default in the software used, and second skeletal model, which consists of 41 steps, through the ChemKin-import file with 16 species. The main result of this study is the selection of a combustion chamber height for the reference calorimeter that produces the best performance in the combustion process, which is 70 mm, as well as the main differences in using a three-step mechanism and a skeletal model to simulate an oxy-fuel combustion reaction.

Combustion of Pulverized Coconut Shell in Lab-Scaled Incinerator Rig using CFD

“…The trend of the CO2 mass fraction was observed to decrease. It was the same reported by J. E. Eduardo, CO2 values were opposite of CO because CO2 molecules were dissociated and formed CO and O where the CO concentration was higher [16]. Besides, the volume average CO2 mass fraction obtained for all the excess air are 0.2582, 0.2507, 0.2196, 0.1896, 0.1709 and 0.1583 respectively.…”

Coded Thermal Wave Imaging based Defect Detection in Composites using Neural Networks

“…Therefore, to minimize the essential security concerns and maintenance cost, a robust and consistent non-destructive testing (NDT) is necessary for testing of composite materials [1]. In general, NDT consists of various non-invasive inspection techniques [2][3] to assess the material properties and structural characteristics of the components, or entire processing units. The demand for material defect detection increases various challenges in NDT [4][5][6].…”