... 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...

... to better understand the combustion phenomena at engine-relevant conditions. It was found that hydrogen addition to natural gas decreases the ignition delay times during combustion to a significant degree while ammonia addition was shown to have varying effects depending on the fuel composition. 1% natural...

...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...

..., for further uncertainty quantification (UQ) studies with modified input uncertainties. 26 06 2018 28 06 2018 Combustion Combustors Computational fluid dynamics Flame Thermoacoustics Thermoacoustic stability analysis should be an essential part of the design process of low...

... manuscript received July 12, 2018; published online September 14, 2018. Editor: Jerzy T. Sawicki. 28 06 2018 12 07 2018 Combustion Combustors Flame Dry low emission (DLE) combustors often are used in power generation gas turbine to meet increasingly stringent emission...

... Syngas Generation,” ASME J. Eng. Gas Turbines Power, 140 (4), p. 041505). The study at hand shows a mass-flow variation of the reforming process with mass flows, which allow for pure syngas combustion and further improvements of the two burner concepts which result in a more application-oriented...

...Kexin Liu; Phill Hubbard; Suresh Sadasivuni; Ghenadie Bulat Extension of gas fuel flexibility of a current production SGT-400 industrial gas turbine combustor system is reported in this paper. A SGT-400 engine with hybrid combustion system configuration to meet a customer's specific requirements...

...] Noiray , N. , Bothien , M. , and Schuermans , B. , 2011 , “ Investigation of Azimuthal Staging Concepts in Annular Gas Turbines ,” Combust. Theory Modell. , 15 ( 5 ), pp. 585 – 606 . 10.1080/13647830.2011.552636 [3] Connor , J. O. , Acharya , V. , and Lieuwen , T. , 2015...

.... It demonstrates the first use of high-speed dual-plane orthogonally-polarized stereoscopic-particle image velocimetry (PIV) and synchronized OH planar laser-induced fluorescence in a premixed swirling flame. We use this technique to explore the effects of combustion and longitudinal acoustic forcing on the time...

...Aditya Saurabh; Hassan Imran; Holger Nawroth; Christian Oliver Paschereit; Lipika Kabiraj Fractal analysis is undertaken to characterize flame surface fluctuations on an unconfined turbulent premixed flame and the resulting far-field acoustics fluctuations. Results indicate that combustion noise...

... the exhaust gas recirculation system, (2) condensation of volatiles from the crankcase ventilation system, (3) leaked oil from valve stem seals, and (4) combustion gas backflow into the intake system during periods of valve overlap. Mechanism 1 occurs because exhaust gas is normally recycled into the engine's...

...J. A. Piehl; O. Samimi Abianeh; A. Goyal; L. Bravo Turbulent spray combustion of n -dodecane was modeled at relevant engine conditions using two combustion models (direct integration of chemistry (DIC) and flamelet generated manifolds (FGM)) and multifidelity turbulence models (dynamic structure...