Analysis of the mechanisms of stable flame propagation in a cross-flow reactor

2021 ◽  
Author(s):  
A.V. Yarkov ◽  
Keyword(s):  
Flame Propagation ◽  
Flow Reactor ◽  
Cross Flow ◽  
Stable Flame

Numerical Simulation of a Reacting Jet in a Vitiated Cross Flow Using a Novel Progress Variable Approach

2017 ◽  
Author(s):  
Rohit Kulkarni ◽  
John P. Wood ◽  
Mario Zuber ◽  
Hasan U. Karim
Keyword(s):  
Flame Propagation ◽  
Gas Turbines ◽  
Accurate Determination ◽  
Cross Flow ◽  
Combustion Products ◽  
Combustion Model ◽  
Progress Variable ◽  
Variable Approach ◽  
Auto Ignition ◽  
Lifted Flames

Staged/sequential combustion is a state of the art method to provide operational flexibility and reduced emissions in gas turbines. To use Computational Fluid Dynamics (CFD) to study such systems a reliable and computationally inexpensive turbulent combustion model is necessary. A key requisite for such a model is the accurate determination of the flame location in order to predict emissions, flame dynamics, and temperature distribution. Previously a model was developed for reheat combustion, based on a progress-variable method using auto-ignition reactors. However, sequential combustion systems are now being implemented where both auto-ignition and flame propagation are important. Consequently, the reheat model has been extended to consider flame propagation in mixtures that do not auto-ignite. This has been achieved by incorporating a small proportion of combustion products in the reactant mixture considered by the reactor. This approach has broadened the model’s applicability to address the full space between auto-ignition and flame propagation regimes. The revised model has been validated by comparison with reacting jet in vitiated cross-flow experiments demonstrating a significantly better prediction of the position of both attached and lifted flames than the original model.

Immobilized cell cross-flow reactor

1984 ◽  
Vol 26 (3) ◽  
pp. 217-220 ◽  
Author(s):  
G. K. Chotani ◽  
A. Constantinides
Keyword(s):  
Flow Reactor ◽  
Cross Flow ◽  
Immobilized Cell

Kinetic and operational study of a cross-flow reactor with immobilized pectolytic enzymes

1990 ◽  
Vol 12 (7) ◽  
pp. 499-505 ◽  
Author(s):  
Pedro Lozano ◽  
Arturo Manjón ◽  
JoséL. Iborra ◽  
Manuel Cánovas ◽  
Félix Romojaro
Keyword(s):  
Flow Reactor ◽  
Cross Flow ◽  
Pectolytic Enzymes

scholarly journals Optimasi pembuatan membran chitosam dalam penurunan COD dan BOD POME (Palm Oil Mill Effluent) [Optimization of the membrane production process to COD and BOD removal of POME (Palm Oil Mill Effluent)]

2016 ◽  
Vol 84 (1) ◽  
Author(s):  
Sri WAHYUNI ◽  
. SISWANTO ◽  
Alia DAMAYANTI
Keyword(s):  
Palm Oil ◽  
Membrane Filtration ◽  
Flow Reactor ◽  
Cross Flow ◽  
Oil Industry ◽  
Palm Oil Mill Effluent ◽  
Physico Chemical ◽  
Reactor Test ◽  
Palm Oil Mill ◽  
Filtration Technology

Palm oil is one of the main commodities that cultivated in Indonesia as the biggest palm oil producer. One of the main problems in palm oil industry is the difficulty to degradate the palm oil mill effluent (POME) due to the high quantity and content of COD and BOD. In physico-chemical, POME can be processed using membrane filtration technology. Chitosan is one of the most widely used material forproducing membrane filtration. Composite of Chitosan-PVA-PEG is a highly mixture absorbent, which possibly can be used as a membrane in filtration process of POME. The experiment was started with the production of composite membrane, and then filtration application using cross-flow reactor system. The variables of this experiment were chitosan and PVA ratio (3:7, 4:5, 1:1, 6:4 and 7:3 (v/v)), and stirring speed (100 rpm and 300 rpm). The reactor test was conducted for 50 minutes and permeate were taken every 10 minutes. Filtration output parameters that were analyzed flux, COD and BOD. The result showed that the highest flux values in the variation of the stirring speed of 100 rpm and 300 rpm were 40.20 L/m2.hr and 27.15 L/m2.hr, respectively. The highest rejection values of COD and BOD were obtained in membrane ratio variation of 1:1 (v/v) and stirring speed of 300 rpm, which are 97.24% and 97.60%, respectitively.

scholarly journals Optimasi Pembuatan Membran Chitosam dalam Penurunan COD dan BOD POME (Palm Oil Mill Effluent) [Optimization of the Membrane Production Process toCOD and BOD removal of POME (Palm Oil Mill Effluent)]

2016 ◽  
Vol 84 (1) ◽  
Author(s):  
Sri WAHYUNI ◽  
. SISWANTO ◽  
Alia DAMAYANTI
Keyword(s):  
Palm Oil ◽  
Membrane Filtration ◽  
Flow Reactor ◽  
Cross Flow ◽  
Oil Industry ◽  
Palm Oil Mill Effluent ◽  
Physico Chemical ◽  
Reactor Test ◽  
Palm Oil Mill ◽  
Filtration Technology

Palm oil is one of the main commodities that cultivated in Indonesia as the biggest palm oil producer. One of the main problems in palm oil industry is the difficulty to degradate the palm oil mill effluent (POME) due to the high quantity and content of COD and BOD. In physico-chemical, POME can be processed using membrane filtration technology. Chitosan is one of the most widely used material forproducing membrane filtration. Composite of Chitosan-PVA-PEG is a highly mixture absorbent, which possibly can be used as a membrane in filtration process of POME. The experiment was started with the production of composite membrane, and then filtration application using cross-flow reactor system. The variables of this experiment were chitosan and PVA ratio (3:7, 4:5, 1:1, 6:4 and 7:3 (v/v)), and stirring speed (100 rpm and 300 rpm). The reactor test was conducted for 50 minutes and permeate were taken every 10 minutes. Filtration output parameters that were analyzed flux, COD and BOD. The result showed that the highest flux values in the variation of the stirring speed of 100 rpm and 300 rpm were 40.20 L/m2.hr and 27.15 L/m2.hr, respectively. The highest rejection values of COD and BOD were obtained in membrane ratio variation of 1:1 (v/v) and stirring speed of 300 rpm, which are 97.24% and 97.60%, respectitively.

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