... an expanded Turkel’s approach for thermally perfect gas mixtures. Partial pressure derivatives are approximated when using the flamelet generated manifolds (FGM) combustion model. The proposed scheme is evaluated through scale-resolving simulations of the Cambridge burner flame SWB1 on an unstructured grid...

...A. Ballotti; S. Castellani; A. Andreini In this study, a dynamic thickening strategy for dynamic thickened flame model for large eddy simulations (DTFLES) application to multi-regime combustion is proposed. The main idea lies in using the numerical solution of an ordinary differential equation (ODE...

... the piston cooling jet (PCJ), which is common in modern engines. Considerable research has been undertaken to identify generalized engine heat transfer correlations and to predict piston and cylinder wall surface temperatures during operation. Most of these correlations require in-cylinder combustion...

... combustion exhaust gas recirculation stability pilot flame Climate change is steadily affecting our environment, with the negative effects and risks becoming increasingly severe [ 1 ]. A major cause of climate change is greenhouse gases, carbon dioxide (CO 2 ) in particular. CO 2 is generated...

..., and nonpolluting combustion systems. This includes more traditional concern for formation of nitrogen oxides (NO x , typically NO and NO 2 ), which can also provide detrimental impacts on both respiratory health and the environment. While NO x emissions were already a primary consideration for natural gas fired...

...Tom Tanneberger; Johannes Mundstock; Christoph Rex; Sebastian Rösch; Christian Oliver Paschereit The vision of a carbon-neutral world implies the shift from fossil to clean fuels for combustion-driven processes and machines like gas turbines. Green hydrogen is a promising alternative to substitute...

... various physical properties to accurately reproduce the spray characteristics. Then, a minimal and high-precision surrogate skeletal mechanism that can be suitable for computational fluid dynamics (CFD) simulations was developed and validated against some fundamental combustion experiments for each...

... decreases the sensitivity of the optimization error to the LHS seed number, i.e., the sample distribution. In this section, the toolchain is used to find scaled designs with similar thermo-physical properties to the reference case described in Sec. 3.2 . Simulations are made with combustion chamber...

... volumetric efficiency and power output. CNG's lower gas jet momentum during a low load operation creates a non-uniform air-fuel mixture that affects ignition and combustion quality. Direct injection of CNG with optimum injection timing is expected to improve volumetric efficiency, ignition quality...

... important ammonia decomposition pathways in the presence of hydrogen and natural gas. combustion emissions fuels and combustion National Aeronautics and Space Administration 10.13039/100000104 80NSSC21K2056 U.S. Department of Energy 10.13039/100000015 DE-FE0032072 e...

...Wenjin Qin; Lihui Xu; Qiang Cheng With the increasing environmental and energy problems, the development of new combustion technology has become a hot topic in the research of internal combustion engine. Reactivity controlled compression ignition (RCCI) combustion mode is the most promising...

... equivalence ratio (Φ global ) and with intake charge preheating to analyze the performance, combustion and emission characteristics of the engine. The important parameters such as brake thermal efficiency, actual diesel replacement, coefficient of variation of indicated mean effective pressure, relative cycle...

... dioxide (CO 2 ) content, respectively, this paper studies the influence of different biogas mixtures compared to natural gas on the combustion in a flameless oxidation (FLOX ® )-based six nozzle combustor. The single staged combustor is suitable for use in a micro gas turbine (MGT) based combined heat...

... capabilities are either using a diffusion burner or some version of a wet low emissions (WLE) burner. Most dry low emission/dry low NO x (DLE/DLN) technologies are currently limited to approximately 60% H 2 or less. Therefore, research is currently underway to develop low NO x gas turbine combustion systems...

...Seyfi Polat; Hamit Solmaz; Ahmet Uyumaz; Alper Calam; Emre Yılmaz; H. Serdar Yucesu In this study, the effects of negative valve overlap (NVO) on homogenous charge compression ignition (HCCI) combustion and engine performance were experimentally investigated. A four stroke, single cylinder, port...

..., the reliable autoignition of the pilot fuel is of utmost importance for combustion in DF engines. However, the autoignition of the pilot fuel suffers from low compression temperatures caused by Miller valve timings. These valve timings are applied to increase efficiency and reduce nitrogen oxide (NO x...

... recirculation models and could be used to calculate combustion air–fuel ratio from the CO and CO 2 content of the burned gas. These are typically complicated parameters to predict due to the slow response time and sensitivity to hydrocarbons of wide-band oxygen sensors. A differing pattern of RGF change...

... timing (IT). During the last few decades, the researchers have studied the effect of various parameters to improve the overall performance characteristics (performance, combustion, and emission) of DFM engines. This paper makes an in-depth analysis to unveil the physical characteristics of the crucial...

...Carlos Xisto; Olivier Petit; Tomas Grönstedt; Anders Lundbladh In the present paper, the synergistic combination of intercooling with pulsed detonation combustion is analyzed concerning its contribution to NO x and CO 2 emissions. CO 2 is directly proportional to fuel burn and can, therefore...

... of Acoustic Systems ,” Acta Acust. Acust. , 102 ( 5 ), pp. 824 – 833 . 10.3813/AAA.918997 [6] Ducruix , S. , Durox , D. , and Candel , S. , 2000 , “ Theoretical and Experimental Determinations of the Transfer Function of a Premixed Laminar Flame ,” Proc. Combust. Inst. , 28 ( 1 ), pp...