Hydrogen/carbon monoxide syngas burning rates measurements in high-pressure quiescent and turbulent environment

High-pressure hydrogen/carbon monoxide syngas turbulent burning velocities measured at constant turbulent Reynolds numbers

“…As to the important turbulent Reynolds number (Re T h u 0 L I /n), it has long been recognized as an intensity indicator of turbulence and an influential factor of turbulence effect on flames, where u 0 and L I are the root-mean-square (RMS) turbulent fluctuation velocity and the integral length scale of turbulence and n is the kinematic viscosity of reactants. Unfortunately, recent syngas turbulent combustion studies [4,5] merely looked at the promotion effect of increasing pressure ( p) on turbulent burning velocities (S T ) of syngas fuel due to the interaction between turbulent straining and enhanced flame instabilities at elevated pressure without any consideration on the impact of Re T enhancement. The increase of Re T is due to the decrease of n as p increases, because n w r À1 w p À1 , where r is the fluid density.…”

“…This is achieved by carefully controlling the product of u 0 L I in proportion to the decreasing n at elevated pressure up to 1.2 MPa in a recently-built, double-chamber, high-pressure explosion facility. The facility can be used to generate the wanted high-Re T near-isotropic turbulence [5,6], as to be discussed later. Typical syngas fuels can be simply decomposed into two major compositions, H 2 and CO, plus a third composition including the rest of other compositions such as CH 4 , CO 2 , and N 2 [1,5].…”

“…The facility can be used to generate the wanted high-Re T near-isotropic turbulence [5,6], as to be discussed later. Typical syngas fuels can be simply decomposed into two major compositions, H 2 and CO, plus a third composition including the rest of other compositions such as CH 4 , CO 2 , and N 2 [1,5]. There are three commonly-used syngas gasifiers: The moving-bed gasifier, the fluidized-bed gasifier, and the entrained-flow gasifier.…”

“…Among them, the entrained-flow gasifier has the highest concentration of CO and H 2 mixtures at the pure oxygen operation conditions. Thus, this paper considers the entrained-flow syngas with a fuel composition of 35% H 2 /65% CO at an equivalence ratio of 4 ¼ 0.5, same as that used in [5] for comparison. We measure such lean syngas laminar and turbulent burning velocities (S L and S T ) as a function of various non-dimensional parameters such as p/ p 0 and u 0 /S L while keeping Re T constant, where p 0 ¼ 0.1 MPa.…”

Preliminary Study on Combustion and Overall Parameters of Syngas Fuel Mixtures for Spark Ignition Combustion Engine

“…can then constitute the rest of the fuel mixture. The syngas is produced from various feedstock, for example, coal, biomass, organic waste, tar or natural gas, by a variety of production processes such as gasification or pyrolysis [1][2][3][4]. The exact composition of a syngas is then given by its production process and feedstock used.…”